Asphalt Contractor September 2022

SEPTEMBER 2022

BONUS:

BATCH VS DRUM: WHAT ASPHALT PLANT WORKS BEST FOR YOU?

+

MEASURE ASPHALT DENSITY WITH CUTTING EDGE

TECH

INDUSTRY EXCLUSIVE: www.ForConstructionPros.com/Asphalt

ROLLER SPEC GUIDE – BROWSE OVER 175 MODELS

A JOHN DEERE COMPANY

It takes a road to get there.

CLOSE TO OUR CUSTOMERS

And a world of experience to build that road. As the global leader in road construction and minerals processing technology, we‘ve seen just about everything there is to see.

In every climate, every condition, every twist, turn and terrain. And we put that world of experience in your hands, so you can experience exceptional performance and results at every phase of the road construction cycle.

WIRTGEN

VÖGELE

HAMM

KLEEMANN

TABLE OF CONTENTS |

SEPTEMBER 2022

COVER STORY Industry Exclusive: Roller Spec Guide Compare over 175 different asphalt rollers to help you decide which will best suit the needs of your team. | 12 SPECIAL REPORT: QUALITY CONTROL

PRODUCTION NOTES

JOBSITE INNOVATIONS

PAVEMENT PRESERVATION

24 Quality Control Products

34 Batch Vs. Drum: What To Consider Before You Buy

38 Which Roller Should I Use?

44 How Do We

Several of the top industry products used for measuring asphalt density.

30 Tech Tools for Measuring Asphalt Density

Investing in new an asphalt plant? These tips can help you find the best match.

By using the proper equipment to measure asphalt density, contractors can help ensure the success of the roadway and keep record of their efforts.

Improve Pavement Longevity?

Selecting the proper roller for the application, and using it correctly, will ensure optimal surface compaction on your construction projects.

Asset owners have more pavements to maintain than money to do so, which is why the industry needs to continually deploy proper preservation techniques to protect these investments.

IN EVERY ISSUE

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CONTRACTOR WWW.FORCONSTRUCTIONPROS.COM/ASPHALT WWW.FORCONSTRUCTIONPROS.COM/ASPHALT

CONTRACTOR

8

Editor’s Perspective

50

The Last Exit

LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS

LATEST INNOVATIONS INNOVATIONS FOR FOR ASPHALT ASPHALT PROFESSIONALS PROFESSIONALS LATEST

ASPHALT ASPHALT

SEPTEMBER 2022 Vol. 36, No. 7

CONTRACTOR CONTRACTOR LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS

LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS

Published by AC Business Media.

Asphalt

Asphalt CONTRACTOR

CONTRACTOR

201 N. Main Street, Fifth Floor Fort Atkinson, WI 53538 (800) 538-5544 • www.ACBusinessMedia.com LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS www.ForConstructionPros.com/Asphalt LATEST INNOVATIONS INNOVATIONS FOR FOR ASPHALT ASPHALT PROFESSIONALS PROFESSIONALS LATEST

4

Published and copyrighted 2022 by AC Business Media. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage or retrieval system, without written permission from the publisher.

Asphalt Contractor (ISSN 1055-9205, USPS 0020-688): is published ten times per year: January, February, March/April, May, June/July, August, September, October, November, December, with an additional Buyer’s Guide issue published in August by AC Business Media, 201 N. Main Street, Fifth Floor, Fort Atkinson, Wisconsin 53538.

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Printed in the U.S.A. SUBSCRIPTION POLICY: Individual subscriptions are available without charge only in the USA. The Publisher reserves the right to reject nonqualifying subscribers. One-year subscription to nonqualifying individuals: U.S. $45.00, Canada & Mexico $65.00, and $95.00 all other countries (payable in U.S. funds, drawn on U.S. bank). Single copies available (prepaid only) $10.00 each (U.S., Canada & Mexico), $15.00 each (International).

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

The BLAW-KNOX

University 2023

PAVER OPERATION AND MAINTENANCE 2023 DATES The Blaw-Knox University, now in its 58th season, is dedicated to training paver operators and foreman on proper Paver Operation and Maintenance and applied Best Paving Practices through classroom-style and hands-on application courses.

For over a half a decade Blaw-Knox has earned its reputation as the go to source of training and instruction on hot mix paving.

Blaw-Knox provides improved technical and problem-solving skills on a variety of paver operations and maintenance topics. Course instructors share decades of field and teaching experience with attendees, including training on the latest DOT requirements.

• • • •

January 16 - January 19 January 23 - January 26 January 30 - February 2 February 6 - February 9

REGISTRATION CLASS SIZE is limited, register today!

DETAILS All details can be found at www.blawknox.com/ training or contact at (407)290-6000 ext. 342 or training@blawknox.com

COME BE PART OF THE EXPERIENCE

Blaw-Knox offers multiple dates to satisfy the demand for its popular courses.

5201 N. Orange Blossom Trail Orlando, Florida 32810

DIGITAL CONNECTION www.ForConstructionPros.com/Asphalt ©phaisarnwong2517 – stock.adobe.com

Report: Economic Indicators Lead to Raised 2022 Forecast An ACT Research analysis of the North American commercial vehicle market shows improvement, reflecting better-than-expected production in June. 2023 is expected to be a good year, the report states.

Read more at:

http://asphalt.com/ j0ixah

IRONPROS Helps Companies Become Better Buyers of New Construction Equipment, Technology and Products A new platform that allows contractors, construction business owners and buying specialists to research almost the entire market of new heavy construction equipment, construction technology solutions and consumable products.

Read more at:

http://asphalt.com/8lz8gk

Two Massive Asphalt Producers Join NAPA’s Net Zero Initiative In order to achieve an ambitious 2050 net-zero emissions goal across the asphalt industry, powerful partnerships are needed.

Read more at: http://asphalt.com/18xjt0

© candy1812 – stock.adobe.com

FHWA Announces Rule Improving Nighttime Visibility with Retroreflective Pavement Marking As the Bipartisan Infrastructure Bill becomes law, the flow of new changes and mandates continues to trickle out of Washington.

Read more at:

http://asphalt. com/4ldza5

©ABCDstock – stock.adobe.com

Comprehensive Guide to Asphalt Plant Technology From increasing efficiencies to lowering carbon footprints, innovations are available to help mix producers meet their goals. Use the QR code below to download this FREE guide and discover the tools and technology to reduce costs, grow profits and produce quality results.

Read more at:

http://asphalt.com/ rkh2yq

6

ASPHALT CONTRACTOR SEPTEMBER 2022

Get social with us! Share pictures of what you’re working with over 29,000 other asphalt contractors on our Facebook page: Facebook.com/ Asphalt.Contractor/ www.ForConstructionPros.com/Asphalt

CONTRACTOR

LATEST ASPHALT PROFESSIONALS PROFESSIONALS LATEST INNOVATIONS INNOVATIONS FOR LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS

EDITOR’S PERSPECTIVE

SEPTEMBER 2022 • Vol. 36 No. 7

ASPHALT

CONTRACTOR

Brandon Noel, Editor

LATEST PROFESSIONALS LATEST INNOVATIONS FOR ASPHALTPROFESSIONALS LATEST INNOVATIONS FOR ASPHALT

Published by AC Business Media

bNoel@ACBusinessMedia.com 234-600-8983

Only As Good As Your People The quality of your company and its product can be most accurately measured by the workers behind them

A

braham Maslow wrote in 1966, "If the only tool you have is a hammer, it is tempting to treat everything as if it were a nail.” I love this concept, because it always helps me do two important things.

First, it helps me reframe any given problem in front of me. Whether I'm in the thick of it, striving to educate myself further in this vast and complex industry I am now a part of, or even normal home repair DIY projects I'm struggling to get done. It makes me take a second look at the "nail,” and ask if there is a completely different way to perceive or quantify my goals. Is it really a nail? Maybe it's screw? Maybe it's the damn wifi router and it just needs unplugged and I just want to smash it with a hammer because it will feel good.

The second thing this quote confronts me with, subsequently, is an appreciation for having the right tool. Once I've really fleshed out the things I want to achieve, the one-dimensional tool (i.e. the hammer) immediately reveals its limitations.

THE TOOLS OF INDUSTRY Like most heavy industries, it is easy to conflate what the real "tools" are when you have giant, hulking machines throwing their impressive weight around. They are truly modern marvels. They can tear up a stretch of highway, process it, blend it and turn it right back around into a freshly pressed road.

And they are getting smarter, more advanced, and complex every day. Our reliance on them

8

grows at a similar pace too. However, when broken down to their most basic elements and function, they are still hammers.

The true and most valuable tools of the industry are the men and women who put their hand to the grindstone every day, stand in the baking sun, put on their boots and get the job done. Smart business owners know this. They listen and pay attention when their people share the knowledge of their experience. A person who's done a task 1000 times knows a thing or two about that task, and sometimes are the first to know when the "hammer" is the wrong way to go.

QUALITY VS CONTROL This issue we've set our sights on quality.

There are a lot of ways to assure the kind of quality standards you need to achieve can be met. In this issue, we share some of the current devices, technology and methodology that can get you there. That isn't the final word, though, because we would be remiss if we left it at that alone. Anyone can tell you how difficult it is, not just in our industry but across the board, to find, hire and keep good hard workers today. Sometimes it is a matter of the pool of available workers, but other times it's not.

Maybe you are like the other thousands of employers out there with open positions that desperately need filled. You are looking for the type of quality employee that you're not going to invest time, resources and energy only to see them bail a short time later. Take a second look. The people on your team likely have a fresh perspective on how to attract what it is you need. Perhaps, it isn't a nail, and you don't need a hammer.

ASPHALT CONTRACTOR SEPTEMBER 2022

Asphalt CONTRACTOR

201 N. Main Street | Fort Atkinson, WI 53538 800.538-5544 • www.ACBusinessMedia.com LATEST INNOVATIONS FOR FOR ASPHALT LATEST PROFESSIONALS LATEST INNOVATIONS ASPHALT PROFESSIONALS PROFESSIONALS www.ForConstructionPros.com/Asphalt

Publication Staff Publisher

Amy Schwandt aschwandt@ACBusinessMedia.com

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Wayne Grayson Gigi Wood

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www.ForConstructionPros.com/Asphalt

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TO

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Discover the full line of SealMaster pavement products & equipment at sealmaster.net

sealmaster.net 800-395-7325

M E LT E R / R A P P L IC A T O

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NO LIMITS. THE OPTIONS ARE LIMITLESS 260-637-5729 • admasphaltplants.com

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W

ith so many options available, purchasing a new piece of equipment that meets your needs is not an easy decision. If you’re in the market for a tandem roller however, this is your best resource. Here, we’ve complied the industry’s only Tandem Roller Spec Guide, featuring equipment specifications for nearly 175 models. For an even easier way to compare, visit the exclusive, interactive and customizable version of this spec guide at http://www.forconstructionpros.com/specguide/roller to sort and compare models based on your requirements.

HAMM/WIRTGEN GROUP HAMM compaction technology boosts paving contractor productivity and profitability. Its expanded series of DV+ rollers offers split drums for compacting tight radii with vibration front and back, or vibration-oscillation. The new HD+ 90i PH VV offers power hybrid technology, combining diesel engine for base load with hydraulic accumulator to meet peak loads, saving fuel, operating and maintenance expenditures. www.ForConstructionPros.com/10073218

*specs are for front vibratory drums only. See additional oscillation drum specs on website for more detail

Model No.

Engine HP (net)

Operating Weight (lbs.)

Drum Width (in.)

Drum Diameter (in.)

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

Notes

HD 8 VV

21.8

3,506

31.5

24.4

0.017 / 0.017

2880 / 3,660

2475/ 3,825

vibration-vibration

HD 10 C VV

21.8

3,704

39.4

24.4

0.015 / 0.015

2888 / 3,660

2475/ 3,825

vibration-vibration

HD 10 VO

25

5,568

39.4

28.3

0.018 / 0.018

3,120 / 4,020

4.725 / 7,875

vibration-oscillation

HD 10 VV

25

5,457

39.4

28.3

0.018 / 0.018

3,120 / 4,020

4,725 / 7,875

vibration-vibration

HD 12 VO

25

6,075

47.2

28.3

0.018 / 0.018

3,120 / 4,020

5,400 / 9,000

vibration-oscillation

HD 12 VV

25

5,942

47.2

28.3

0.018 / 0.018

3,120 / 4,020

5,400 / 9,000

vibration-vibration

HD 12i VV

32.2

5,942

47.2

28.3

0.018 / 0.018

3,060/3,900

6,750/11,025

vibration-vibration

HD 13i VO

50.1

9,338

51.2

35.4

0.012 / 0.020

3,060 / 3,600

8,775 / 14,400

vibration-oscillation

HD 13i VV

50.1

9,184

51.2

35.4

0.012 / 0.020

3,060 / 3,600

8,775 / 14,400

vibration-vibration

HD 14i VO

50.1

10,000

54.3

35.4

0.012 / 0.020

3,060 / 3,600

8,775 / 14,400

vibration-oscillation

HD 14i VV

50.1

9,779

54.3

35.4

0.012 / 0.020

3,060 / 3,600

8,775 / 14,400

vibration-vibration

HD+ 70i VO

74.2

16,383

59

45

0.014 / 0.025

2,880 / 3,480

15,525 / 18,900

vibration-oscillation

HD+ 70i VV

74.2

15,832

59

45

0.014 / 0.025

2,880 / 3,480

15,525 / 18,900

vibration-vibration

HD+ 70i VV HF

74.2

15,832

59

45

0.014 / 0.025

2,700 / 4,020

16.650 / 20,700

high-frequency vibration

HD+ 80i VO

74.2

16,802

66

45

0.013 / 0.024

2,880 / 3,480

15,525 / 19,575

vibration-oscillation

HD+ 80i VV

74.2

16,626

66

45

0.013 / 0.024

2,880 / 3,480

15,525 / 19,575

vibration-vibration

HD+ 80i VV HF

74.2

16,626

66

45

0.013 / 0.024

2,700 / 4,020

17,325 / 20,700

high-frequency vibration

HD+ 80i VV-S

74.2

17,331

66

45

0.014 / 0.020

2,520 / 3,000

14,175 / 14,175

vibration with split drums

HD+ 90i VO

114

20,176

66

47

0.013 / 0.024

2,520 / 3,000

13,500 / 16,875

vibration-oscillation

HD+ 90i VV

114

20,176

66

47

0.013 / 0.024

2,520 / 3,000

13,500 / 16,876

vibration-vibration

HD+ 90i VV HF

114

20,176

66

47

0.011 / 0.019

2,700 / 4,020

15,075 / 18,900

high-frequency vibration

HD+ 90i VV-S

114

21,234

66

47

0.016 / 0.024

2,520 / 3,000

17,550 / 18,900

vibration with split drums

HD+ 90i PH VV

74.2

19,955

66

47

0.013 / 0.024

2,520 / 3,000

13,500 / 16,875

vibration with hydraulic hybrid drive

HD+ 110i VO

114

21,885

66

47

0.019 / 0.032

2,520 / 3,000

22,275 / 27,000

vibration-oscillation

HD+ 110i VV

114

22,711

66

47

0.019 / 0.032

2,520 / 3,000

22,275 / 27,000

vibration-vibration

HD+ 110i VV HF

114

22,711

66

47

0.013 / 0.029

2,700 / 4,020

28,800 / 33,075

high-frequency vibration

HD+ 120i VO

154

27,596

78

55

0.014 / 0.035

2,400 / 3,000

21,375 / 38,925

vibration-oscillation

HD+ 120i VV

154

26,978

78

55

0.014 / 0.035

2,400 / 3,000

21,375 / 38,925

vibration-vibration

HD+ 120 VV HF

154

27,684

78

55

0.011 / 0.028

2,700 / 4,020

33,075 / 38,925

high-frequency vibration

HD+ 140 VO

154

28,257

84

55

0.013 / 0.034

2,400 / 3,000

21,375 / 40,500

vibration-oscillation

HD+ 140 VV

154

27,816

84

55

0.013 / 0.034

2,400 / 3,000

21,375 / 40,500

vibration-vibration

HD+ 140 VV HF

154

27,860

84

55

0.010 / 0.027

2,700 / 4,020

33,750 / 40,500

high-frequency vibration

DV+ 70i VV-S

74.2

17,166

59

45

0.017 / 0.024

2,520 / 3,000

15,075 / 15,300

vibration with split drums

DV+ 70i VO-S

74.2

17,232

59

45

0.017 / 0.024

2,520 / 3,000

15,075 / 15,300

split-drum vibration with oscillation

DV+ 90i VV-S

99.7

21,014

66

47

0.016 / 0.024

2,520 / 3,000

17,550 / 18,900

vibration with split drums

DV+ 90i VO-S

99.7

20,617

66

47

0.016 / 0.024

2,520 / 3,000

17,550 / 18,900

split-drum vibration with oscillation

12

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

HYUNDAI CONSTRUCTION EQUIPMENT AMERICAS The Hyundai HR series tandem-drum rollers offer hydrostatic vibration system at both drums and automatic vibration mode (double / single vibration) – combined with front and rear scrapers to keep the drums free of material buildup. www.ForConstructionPros.com/10073348 Model No.

Engine HP

Operating Weight

Drum Width

Drum Diameter

Amplitude

(net)

(lbs.) (with ballast)

(in.)

(in.)

(in.)

Frequency (vpm)

Centrifugal Force (lbs.)

HR25T-9

31

5,952

39

30

0.02

3,180 / 3,660

4,833 / 6,295

HR26T-9

31

6,393

47

30

0.02

3,180 / 3,660

5,620 / 7,644

HR30T-9

31

6,614

49

30

0.02

3,120 / 3,480

6,519 / 8,318

SAKAI Sakai America specializes in asphalt rollers, soil rollers and light compaction equipment for the road paving and construction site preparation markets. Sakai is one of the compaction industry’s most experienced manufacturers and is known for its Japanese reliability, quality and operating simplicity. Long-life drum isolators, heavy-duty center-pin hitch and gear-driven drums limit down time for operators. 4,000 vpm high frequency vibration in both drums available. www.ForConstructionPros.com/10074524

Model No.

Engine HP (net)

Operating Weight (lbs.)

Drum Width (in.)

Drum Diameter (in.)

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

SW354

24

6,525

47

27

0.012

4,000

6,520

SW354W

24

6,745

51

27

0.011

4,000

6,520

SW504

43

8,955

51

31

0.011 / 0.014

3,300 / 3,300

5,955 / 7,710

SW504W

43

9,260

54

31

0.010 / 0.013

3,300 / 3,300

5,955 / 7,710

SW654

73

15,585

58

42

0.011 / 0.021

3,000 / 4,000

13,940 / 15,510

SW654ND

73

16,250

58

42

2,940 / 2,940

15,285 vibe / 27,875 osc

SW774

110

22,090

66

49

2,500 / 4,000

9,665 / 23,155

SW774ND

110

23,270

66

49

3,000 / 3,000

25,180 vibe / 30,800 osc

SW884

130

28,415

79

55

2,500 / 4,000

14,160 / 39,790

SW884ND

130

29,165

79

54

3,000 vibe / 2,800 osc

35,585 vibe / 38,600 osc

SW994

130

29,255

84

55

2,500 / 4,000

15,285 / 41,590

3,000 vibe / 2,800 osc

35,585 vibe / 38,600 osc

0.020 vibe / 0.030 osc 0.012 / 0.020 0.020 vibe / 0.024 osc 0.013 / 0.025 0.022 vibe / 0.024 osc 0.013 / 0.026 0.021 vibe / 0.022

SW994ND

130

29,960

84

54

CR271

16

3,245

35

22

0.014

4,000

2,965

R2H-4

73

30,955

83 (combined)

64

Static

Static

Static

www.ForConstructionPros.com/Asphalt

osc

SEPTEMBER 2022 ASPHALT CONTRACTOR

13

Sponsored by

VOLVO CONSTRUCTION EQUIPMENT Double-drum asphalt compactors from Volvo Construction Equipment offer a range of unique features that support productivity and accuracy. Compact Assist, the Volvo Intelligent Compaction System with Density Direct, provides real-time density calculations as well as pass and temperature mapping. Many models have optional 8-amplitude settings, and the DD128C offers the highest frequency (4,800 VPM) in the industry. ActiveCare Direct, Volvo’s managed telematics program, focuses on easy-to-understand case alerts rather than traditional fault codes. www.ForConstructionPros.com/10075146 Engine HP (net)

Operating Weight (lbs.)

Drum Width (in.)

DD15

16.4

3,372

35.4

22

0.015

4,000

3,500

DD15 (wide drum)

16.4

3,601

39.4

22

0.016

4,000

4,000

DD25B

25

5,545

39.4

27.5

0.021

3,300 / 4,000

5,732 / 8,430

DD25B (wide drum)

25

5,776

47.2

27.5

0.0197

3,300 / 4,000

6,227 / 9,127

DD30B

49.6

6,839

49.2

29

0.015

4,000

8,005

DD35B

49.6

8,185

54.1

29

0.013

4,000

8,005

DD105

114

22,051

66.1

48

0.02 / 0.03

2,400 / 3,000

22,256 / 25,179

"Front drum: 2,400 / 3,000 Rear drum: 2,340"

"Front drum: 22,256 / 25,179 Rear drum: 32,373"

Model No.

Drum Diameter (in.)

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

DD105OSC

114

21,718

66.1

48

"Front Drum: 0.02 / 0.030 Rear drum: .0539"

DD110C

148

24,355

67

51

0.010 / 0.025

3,800

16,240 / 41,170

DD120C

148

27,700

79

55

0.014 / 0.0349

3,000 / 4,000

30,020 / 42,070

DD120C (8 amplitude)

148

27,700

79

55

0.0149 / 0.0276

3,400

22,980 / 42,680

DD128C

148

28,430

79

55

0.0033 / 0.03

3,000 / 4,800

11,750 / 41,790

DD140C

148

30,486

84

55

0.0139 / 0.0346

4,000 / 2,700

36,680 / 41,720

DD140C (8 amplitude)

148

30,486

84

55

0.0129 / 0.0249

3,200

21,810 / 42,170

WACKER NEUSON No matter what the job site requirements, Wacker Neuson has the perfect roller to fit the job. The newest designs include excellent curb and side clearance, outstanding visibility to the drum edges and increased water and fuel capacities to minimize refills during the work day, increasing efficiency. www.ForConstructionPros.com/10075166 Model No.

Engine HP (net)

Operating Weight (lbs.)

Drum Width (in.)

Drum Diameter (in.)

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

RD12L-90

20.8

2,964

35.4

22

0.043

4,200

3,400

RD18-80

19.8

3,483

31.5

24.4

0.02

3,900

5,620

RD18-100

19.8

3,681

39.5

24.4

0.02

3,900

5,620

RD24-100

24.8

5,456

39.5

28.4

0.02

4,020

10,341

RD24-100o*

24.8

5,566

39.5

28.4

--

2,340

10,341 / 9,000**

RD28-120

24.8

5,941

47.3

28.4

0.02

4,020

11,690

RD28-120o*

24.8

6,073

47.3

28.4

--

2,340

11,690 / 9,000**

RD40-130

49.3

8,741

51.2

35.5

0.02

3,600

14,400

RD40-130o*

49.3

8,851

51.2

35.5

--

2,340

14,000 / 16,200**

RD45-140

49.3

9,579

54.4

35.5

0.02

3,600

14,387

RD45-140o

49.3

9,777

54.4

35.5

--

2,340

14,000 / 16,200**

* Oscillating drum; ** Oscillation force

14

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

BOMAG AMERICAS, INC. BOMAG offers three different types of vibrator/ exciter systems – standard, TanGo oscillation and Asphalt Manager directional vibration – to meet customer needs. www.ForConstructionPros.com/10072222

TanGO Oscillation

Standard (circular excited) vibration

Model No.

Engine HP

Operating

Drum Width

Drum Diameter

(net)

Weight (lbs.)

(in.)

(in.)

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

BW900-50

20

2,646

35.4

22

0.02

4,200

3,372

BW90AD-5

20.2

3,527

35.4

22.8

0.02

2,520 / 3,780

1,799 / 3,822

BW100ADM-5

20.2

3,638

39.4

22.8

0.016

2,520 / 3,780

1,799 / 3,822

BW100SL-5

24.8

5,181

39.4

27.6

0.02

4,320

7,640

BW120SL-5

24.8

5,511

47.2

27.6

0.02

4,320

8,993

BW100AD-5

33

5,512

39.4

27.6

0.02

3,780 / 4,020

6,744 / 7,644

BW120AD-5

33

5,953

47.2

27.6

0.02

3,780 / 4,020

8,093 / 9,217

BW135AD-5

45.1

8,488

51.2

35.4

0.02

3,000 / 3,360

8,543 / 10,791

BW138AD-5

45.1

9,370

54.3

35.4

0.02

3,000 / 3,360

10,116 / 12,814

BW141AD-5 *

74.1

15,212

59.1

43.3

0.011 / 0.028

4,200 /3,000

16,411 / 20,907

BW151AD-5 *

74.1

16,755

66.1

43.3

0.010 / 0.027

4,200 /3,000

16,411 / 20,907

BW154AD-5

74.1

18,298

66.1

43.3

0.012 / 0.024

3,300 / 2,700

14,613 / 20,008

BW161AD-5 *

114

22,046

66.1

48

0.016 / 0.032

4,020 / 3,000

25,628 / 27,427

BW190AD-5 *

114

26,566

78.3

48

0.013 / 0.036

4,200 /3,000

27,876 / 39,791

BW191AD-5 *

140.8

29,763

78.7

55.1

0.011 / 0.031

4,200 /3,000

28,102 / 39,116

BW206AD-5 *

140.8

31,085

84.1

55.1

0.011 / 0.031

4,200 /3,000

28,102 / 39,116

BW161ADO-5 *

114

21,164

66.1

48

(f) 0.016 / 0.032; (r) 0.054

(f) 4,020 / 3,000; (r) 2,400

(f) 25,628 / 27,427

BW190ADO-5 *

114

25,353

78.3

48

(f) 0.013 / 0.035; (r) 0.053

(f) 4,200 / 3,000; (r) 2,400

(f) 27,876 / 39,791

BW191ADO-5 *

140.8

28,881

78.7

55.1

(f) 0.011 / 0.031; (r) 0.056

(f) 4,200 / 3,000; (r) 2,400

(f) 28,102 / 39,116

BW206ADO-5 *

140.8

29,542

84.1

55.1

(f) 0.011 / 0.031; (r) 0.054

(f) 4,200 / 3,000; (r) 2,400

(f) 28,102 / 39,116

BW151AD-5 AM

74.3

17,417

66.1

43.3

(f) 0-0.035; (r) 0.011 / 0.027

(f) 2,700; (r) 2,700 / 2,700

(f) 0-31,923; (r) 6,744 / 16,861

Asphalt Manager

BW161AD-5 AM

127

22,487

66.1

48

(f) 0-0.036; (r) 0.017 / 0.034

(f) 2,700; (r) 2,700 / 2,700

(f) 0-34,170; (r) 11,465 / 21,806

BW191AD-5 AM

140.8

30,644

78.7

55.1

(f) 0-0.034; (r) 0.017 / 0.037

(f) 2,700; (r) 2,700 / 2,700

(f) 0-26,977; (r) 16,861 / 36,644

BW206AD-5 AM

140.8

31,967

84.1

55.1

(f) 0-0.033; (r) 0.017 / 0.036

(f) 2,700; (r) 2,700 / 2,700

(f) 0-26,977; (r) 16,861

Pivot Steer

/ 36,644

BW154AP-4V

74.2

16,653

59.1

43.3

0.012 / 0.026

3,300 / 2,400

14,163 / 15,512

BW174AP-4V

99.6

20,283

66.1

48

0.008 / 0.018

3,600 / 2,700

13,713 / 17,985

BW154APO-4V

74.2

16,094

59.1

43.3

(f) 0.013 / 0.026; (r) 0.031

(f) 2,760 / 2,700; (r) 2,700

(f) 14,162 / 15,512

BW174APO-4V

99.6

20,944

66.1

48

(f) 0.008 / 0.018; (r) 0.029

(f) 2,760 / 2,700; (r) 2,700

(f) 13,713 / 17,985

BW154AP-4V AM

74.2

16,094

59.1

43.3

(f) 0-0.031; (r) 0.013 / 0.026

(f) 2,700; (r) 2,760 / 2,700

(f) 0-26,752; (r) 9,892 / 19,783

BW174AP-4V AM

99.6

20,944

66.1

48

(f) 0-0.028; (r) 0.008 / 0.018

(f) 2,760; (r) 2,700 / 2,700

(f) 0-32,822; (r) 7,644 / 17,985

16

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

Sponsored by

CASE CONSTRUCTION EQUIPMENT CASE E Series vibratory rollers feature a completely redesigned operator interface for intuitive operation and improved ergonomics.

New control features include an electronic travel lever with an extended range of functions right at the operator’s fingertips, including RPM settings, drive settings, sprinkler system controls, parking brake and more. www.ForConstructionPros.com/10072356

Model No.

Engine HP (net)

Operating

Drum

Drum Diameter

Weight (lbs.)

Width (in.)

(in.)

Amplitude (in.)

Frequency

Centrifugal

(vpm)

Force (lbs.)

DV23E

33.5

4,960

39.4

27.4

0.02

3,480 / 3,960

9,217

DV26E

33.5

5,490

47.2

27.4

0.02

3,480 / 3,960

10,566

DV36E

43.9

8,290

51.2

33.5

.016 - .024

2,460 / 3,300

11,668

DV45E

43.9

10,252

54.3

33.5

.016 - .024

2,460 / 3,300

12,949

DV36E

43.9

8,290

51.2

33.5

.014 - .022

2,700 / 3,420

11,240

DV45E

43.9

10,340

54.3

33.5

.014 - .022

2,700 / 3,420

12,364

DV209D

100

21,080

66

48

.013 - .0276

2,520 / 3,300

15,737 / 18,884

DV210D

100

22,930

66

48

.014 - .032

2,520 / 3,120

17,535 / 26,977

www.ForConstructionPros.com/Asphalt

SEPTEMBER 2022 ASPHALT CONTRACTOR

17

Sponsored by

CATERPILLAR, INC. Caterpillar has a wide range of compaction products designed to make customers more successful. An extensive Cat dealer network gives customers the best lifetime value from their equipment allowing them to focus on getting the job done. We build the machines that build a better world. For more information visit cat.com. www.ForConstructionPros.com/10075307

Engine HP (net)

Operating Weight (lbs.)

Rolling Width (in.)

Drum Diameter (in.)

CB1.7

24.7

3,538

35

22.5

0.019

4,200

3,057

CB1.8

24.7

3,825

39

22.5

0.019

3,900

3,057

CB7 (solid drum)

100

17,615

59

44

0.012/0.026

3,200 / 3,800

11,982 / 17,603

Two Amplitude, Two Frequency vibratory system

CB8

100

18,783

67

44

0.010/0.022

3,200 / 3,800

11,982 / 17,603

Two Amplitude, Two Frequency vibratory system

CB10 (solid drum)

131

20,945

67

47

0.012/0.032

2,400 / 3,800

15,714 / 18,344

Two Amplitude, Two Frequency vibratory system (Option 1)

CB10 (solid drum)

131

20,945

67

47

0.010/0.015

3,800

13,084 / 19,491

Versa-Vibe vibratory system operating on high frequency

0.044

2,400

–

Standard drum

Model No.

Rear drum oscillation system for CB7, CB10, CB13, CB15, CB16

Amplitude (in.)

Frequency (vpm)

Centrifugal Force (lbs.)

Notes

CB13

142

27,557

79

51

0.026/0.030

2,520

16,950 / 19,963

Versa-Vibe vibratory system operating on low frequency

CB13

142

27,557

79

51

0.012/0.016

3,800

17,422 / 23,222

Versa-Vibe vibratory system operating on high frequency

CB13

142

27,557

79

51

0.012/0.019/0.026/0.032/0.038

2,520

7,800 / 24,728

Five Amplitude vibratory system

CB15

142

28,958

84

51

0.026/0.030

2,520

16,950 / 19,963

Versa-Vibe vibratory system operating on low frequency

CB15

142

28,958

84

51

0.012/0.016

3,800

17,422 / 23,222

Versa-Vibe vibratory system operating on high frequency

CB15

142

28,958

84

51

0.016/0.026/0.033/0.037/0.041

2,520

12,409 / 31,069

Five Amplitude vibratory system

CB16

142

31,941

84

51

0.026/0.030

2,520

16,950 / 19,963

Versa-Vibe vibratory system operating on low frequency

CB16

142

31,941

84

51

0.012/0.016

3,800

17,422 / 23,222

Versa-Vibe vibratory system operating on high frequency

CB16

142

31,941

84

51

0.016/0.026/0.033/0.037/0.041

2,520

12,409 / 31,069

Five Amplitude vibratory system

CB2.5

48.2

5,546

39

28

0.51

3180/3840

4,592/6,696

CMV Optional

CB2.5 GC

24.6

5,546

39

28

0.51

3000/3720

3,925/5,885

CMV Optional

CB2.7

48.2

5,936

47

28

0.52

3180/3840

5,437/7,928

CMV Optional

CB2.7 GC

24.6

5,936

47

28

0.52

3000/3720

4,646/6,968

CMV Optional

Continued on page 34

18

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

Provide high-quality compaction in areas where vibration needs to be reduced with oscillation technology; bridge decks and joints, near foundations and concrete structures and better performance on thin asphalt layers.

Full seat rotation with electronic steering to improve comfort an ergonomics

Easy to change timing belt — only 2 working hours needed

Drum shell is made of highly wear resistant Hardox® steel, ensuring many hours of trouble free running

Large water tank to prevent more stops for refilling

Record number of passes, potion, temperature and compaction value in real time with Dyn@Lyzer

Eco Mode and automatic idling saves up to 15% fuel while lowering noise level

Industry’s best warranty for oscillation drum shell – 7 years / 7,500 hr pro-rated warranty

dynapac.us | 800-651-0033 Follow Dynapac North America

Designed to perform, Built to last

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Continued from page 18 CB2.9

48.2

6,415

51

28

0.50

3180/3840

5,559/8,108

CMV Optional

CC2.7

48.2

5,718

47

28

0.52

3180/3840

5,437/7,928

CMV Optional

CC2.7 GC

24.6

5,718

47

28

0.52

3000/3720

4,646/6,968

CMV Optional

CB4.0

48.2

7,971

51

32

0.50

2700/3300

5,037/7,524

CMV Optional

CB4.4

48.2

8,362

55

32

0.49

2700/3300

5,240/7,827

CMV Optional

CC4.0

48.2

7,889

51

32

0.50

2700/3300

5,037/7,524

CMV Optional

CB16

142

31,941

84

51

0.012/0.016

3,800

17,422 / 23,222

Versa-Vibe vibratory system operating on high frequency

CB16

142

31,941

84

51

0.016/0.026/0.033/0.037/0.041

2,520

12,409 / 31,069

Five Amplitude vibratory system

CB2.5*

48.2

5,546

39

28

0.51

3180/3840

4,592/6,696

CMV Optional

CB2.5 GC*

24.6

5,546

39

28

0.51

3000/3720

3,925/5,885

CMV Optional

CB2.7*

48.2

5,936

47

28

0.52

3180/3840

5,437/7,928

CMV Optional

CB2.7 GC*

24.6

5,936

47

28

0.52

3000/3720

4,646/6,968

CMV Optional

CB2.9*

48.2

6,415

51

28

0.50

3180/3840

5,559/8,108

CMV Optional

CC2.7*

48.2

5,718

47

28

0.52

3180/3840

5,437/7,928

CMV Optional

CC2.7 GC*

24.6

5,718

47

28

0.52

3000/3720

4,646/6,968

CMV Optional

CB4.0*

48.2

7,971

51

32

0.50

2700/3300

5,037/7,524

CMV Optional

CB4.4*

48.2

8,362

55

32

0.49

2700/3300

5,240/7,827

CMV Optional

CC4.0*

48.2

7,889

51

32

0.50

2700/3300

5,037/7,524

CMV Optional

*NEW MODEL

WEILER The Weiler C307A and C310A Split-Drum Static Compactors enable the outer half of the drum to rotate faster than the inner half resulting in quick work on corners and curves, without mat tearing. www.ForConstructionPros.com/10075409

Model No.

20

Engine HP

Operating

Drum Width

Drum Diam-

Amplitude

Frequency

Centrifugal

(net)

Weight (lbs.)

(in.)

eter (in.)

(in.)

(vpm)

Force (lbs.)

C307A

74

20,500

50

40/53

N/A

N/A

N/A

C310A

74

26,580

50

40/53

N/A

N/A

N/A

C303

24

5,700

38/44

30

N/A

N/A

N/A

ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

INNOVATION FOR THE FUTURE

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© 2022 Caterpillar. All Rights Reserved. CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow,” the “Power Edge” and Cat “Modern Hex” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

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Engine

Operating

HP (net)

Weight (lbs.)

CC900G

19

2,800

35

23

0.016

4,200

3,800

CC950

20

3,000

35

23

0.016

4,200

3,800

CC800

24

3,400

31

23

0.016

4,200

3,800

CC900

24

3,500

35

23

0.016

4,200

3,800

CC1000

24

3,700

40

23

0.014

4,200

3,800

CC1100 VI

25

5,300

42

27

0.02

3,660 / 3,960

5,600 / 6,500

CC1200 VI

35

5,700

47

27

0.02

3,660 / 3,960

6,500 / 7,600

CC2200

75

17,000

59

45

0.01 / 0.03

2,880 / 4,020

15,060 / 17,540

CC2300

75

18,800

59

45

0.008 / 0.020

2,880 / 4,020

13,260 / 16,190

CC3200

75

17,000

68

45

0.01 / 0.03

2,880 / 4,020

16,880 / 20,250

CC3300

75

19,800

68

45

0.01 / 0.02

2,880 / 4,020

16,190 / 18,440

CC4200 VI

130

22,000

68

51

0.012 / 0.031

3,060 / 4,020

18,880 / 28,780

CO4200 VI

130

22,000

66

51

0.012 / 0.031 (0.06 - Osillcation Drum)

3,060 / 4,020

18,880/ 28,780 (27,450 - Osillation Drum)

CC5200 VI

130

22,700

77

51

0.012 / 0.031

3,060 / 4,020

20,910 / 32,370

CO5200 VI

130

25,800

77

51

0.012 / 0.031 (0.06 - Oscillation Drum)

3,060 / 4,020

20,910 / 32,370 (27,450-Osillation Drum)

CC6200 VI

130

27,300

84

51

0.012 / 0.031

3,060 / 4,020

23,160 / 35,300

CC1100C VI

35

4,900

42

28

0.02

3,660 / 3,960

5,600 / 6,500

CC1200C VI

35

5,100

47

28

0.02

3,660 / 3,960

6,500 / 7,600

CC2200C

75

16,300

59

45

0.012 / 0.028

2,880 / 4,020

15,060 / 17,540

CC2300C

75

16,800

59

45

0.008 / 0.020

2,880 / 4,020

13,260 / 16,190

CC3200C

75

17,000

68

45

0.012 / 0.028

2,880 / 4,020

16,880 / 20,250

CC3300C

75

17,400

68

45

0.01 / 0.02

2,880 / 4,020

16,190 / 18,440

CC4200C VI

130

20,700

66

51

0.012 / 0.031

3,060 / 4,020

18,800 / 28,780

CC5200C VI

130

22,700

77

51

0.012 / 0.031

3,060 / 4,020

20,910 / 32,370

CS1400N

75

27,800

41.7 rear/ 22.4 front

59

Static

Static

Static

CC1400 VI

50

9,500

54

35

0.008 / 0.020

3,240 / 3,660

4,950 / 9,675

CC1400C VI

50

8,600

54

35

0.008 / 0.020

3,240 / 3,660

4,950 / 9,675

CC1300 VI

50

8,600

51

35

0.008 / 0.020

3,240 / 3,660

4,700 / 8,500

CC1300C VI

50

8,200

51

35

0.008 / 0.020

3,240 / 3,660

4,700 / 8,500

CO2200

75

17,000

59

45

0.01 / 0.03 (0.06 - Oscillation Drum)

2,400

15,060 / 17,540 (23,100 - Oscillation Drum)

CO6200 VI

130

27,300

84

51

0.012 / 0.031 (0.06 - Oscillation Drum)

3,060 / 4,020

23,150 / 35,300 (34,400-Osillation Drum)

CC900S

24

3,600

35

23

0.013

4,200

3,800

Model No.

22

Drum Width (in.)

Drum Diameter

Amplitude (in.)

(in.)

ASPHALT CONTRACTOR SEPTEMBER 2022

Frequency

Centrifugal Force (lbs.)

(vpm)

www.ForConstructionPros.com/Asphalt

QUALITY CONTROL InstroTek 3500 Xplorer Nuclear Density Gauge A highly advanced but very intuitive moisture density gauge with straightforward and uncomplicated operation.

• Menu options are easy to read and navigate • A backlit LCD screen and special scroll functions allow operators to easily read the Xplorer’s two-line display during day or nighttime work • The simple keypad layout and program design will permit technicians to quickly move from other moisture density gauges to the Xplorer 3500 • Battery Saver and InteliCharge extend battery life keeping the gauge on the job instead of on the charger • This unit has been thoroughly tested for ruggedness and accuracy www.ForConstructionPros.com/21010109

Volvo Density Direct Intelligent Compaction System Available in two packages for select Volvo designs— Volvo IC and Volvo IC with Density Direct.

• Offers pass mapping, temperature mapping and data storage features; Volvo IC with Density Direct includes real-time density mapping technology • Produces a density calculation that is accurate to within 1.5 percent of core sampling, providing a real-time reading of density values over 100 percent of the mat • Reduces the occurrence of inadequate densities and time spent taking core samples, improves quality, and leads to much greater uniformity • User interface depicts a density map, showing each square foot of rolled asphalt in a color representing density, and also provides a realtime numerical density reading displayed in the corner of the screen • Data gathered from pass mapping, temperature mapping and density mapping is stored on the IC system’s internal 14 GB hard drive, which provides enough space for approximately seven months of data logging • Meets state DOT and FHWA requirements for intelligent compaction specifications www.ForConstructionPros. com/12058450

24

ASPHALT CONTRACTOR SEPTEMBER 2022

GSSI PaveScan 2.0 Asphalt Density Assessment Tool Can be used to uncover problems that occur during the paving process, including poor uniformity and significant variations in density, to help avoid premature failures such as road raveling, cracking and deterioration along joints.

• Sensor design built specifically for the extremes of the asphalt paving environment • Foldable deployment arms with high-visibility for work site safety • Warm-up time of under one minute when ambient temperature is over 70° F www.ForConstructionPros.com/21119999

Topcon Thermal Mapping System for Asphalt Paving Designed to monitor temperature segregation and easily provide accurate compliance reporting, all with real-time kinematic (RTK) positioning accuracy.

• Provides a visualization to operators in real time of whether the mix falls within a pre-defined temperature range • Quickly tells operators if mix is stable or if moderate or severe temperature variation is occurring • Creates data reporting files to download for applications such as DOT compliance via an interactive Pavelink module www.ForConstructionPros.com/21121074

For more information visit https://pavemg.com/gmpcn2 www.ForConstructionPros.com/Asphalt

A decidedly human touch to plant automation.

Designed around real people.

“The plant control system that MINDS designed for us has worked very well.

The graphics depict the plant almost identically as built and are very easy to follow from the control room. Each value is shown with its position indicated by colours that make identifying issues, such as a stuck valve, extremely easy.

The materials that we have produced with the system have been very consistent from the first production run.”

Allen Hendricks, Vise President, Asphalt Divisions Manager Blythe Construction, Inc.

For the past 25 years, MINDS has built a reputation for user-friendly, advanced, customizable plant automation control systems. As of April 2022, we became part of the Astec family to add to their Rock to Road solution for asphalt road building. MINDS provides award-winning desktop software, mobile apps, and hardware for many applications:  Drums, Batches, Combo/hybrid hot mix plants, Emulsion plants, Liquid Terminals.  Silo load-out, Ticketing, and Cloud-based data management for the Rock to Road industry.

Better data.

Increased control.

Higher profits.

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DESIGN, DETAILS, AND DURABILITY.

10106 SMITH ROAD, FORT WAYNE, IN 46809 | (260) 672-3004 | ALmix.com

QUALITY CONTROL

InstroTek NoNuke Non-Nuclear Asphalt Density Gauge Offers system error warnings and advanced measurement technology which can result in a more accurate and precise density and percent compaction measurements.

• Systems include Moisture Presence Warning, Auto Surface-Roughness Correction and Gauge System Checks, which notify the user of potential gauge issues and help eliminate outside factors that can affect the gauge reading • Free NoNuke Mobile App can be downloaded from the Google Play Store and can capture data, display test results and create reports from any Android smartphone or tablet www.ForConstructionPros. com/21138201

PaveScan Mix Design Module Sensitive to subtle changes in aggregate, mix and moisture, comparing daily samples against approved mix designs makes any deviations apparent and helps to fix any problems before the mix is deployed in the field.

• With one five-minute lab test, users can accurately reveal problems before any need for silo dumps or other costly remediation • PaveScan MDM also turns our PaveScan RDM system into a powerful new Quality Control (QC) tool for asphalt density assessment • PaveScan MDM creates a correlation between the dielectric value of the mix at different percent voids • This correlation is used by PaveScan RDM to show accurate density variability within the asphalt mat • This degree of process control means bridge decks and longitudinal joints can now be rolled to specification in real-time www.ForConstructionPros.com/22106006

FAMC GT1 Asphalt/RCC Paving System A cost-effective system that allows you to pave to a fixed thickness to the surface below. The dual sonic sensors, placed on each side of the screed, in conjunction with the slope sensor gives you precise control over slope and grade. This system will also make your machine Leica 3D ready regardless of manufacturer or year.

• Able to control elevation, screed endgate, and steering capability.

• Can be installed on any make, model, or year asphalt paving machine.

• Screed control is made easy using the intuitive Danfoss interface that is designed with the operator in mind • Sun glare or inclement weather will almost never be a concern to this interface as the anti-glare coated screen is IP66 rated and connectors are MIL-SPEC IP67 • Along with the reliability and precision of the GT1 system, FAMC provides training, installation, and 24-7 support to ensure success • Systems are proudly made in the USA and replacement components are stocked to be available within hours www.ForConstructionPros.com/22159002

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ASPHALT CONTRACTOR SEPTEMBER 2022

www.ForConstructionPros.com/Asphalt

Connect on a different level.

This is a dimension of Trimble you’ve never experienced. This is Dimensions+. We’re creating a space to connect better—with Trimble and with your industry on a personal level. So you can learn and collaborate to do your work, better.

The future of engineering and construction has never been brighter.

THE VENETIAN RESORT LAS VEGAS November 7–9, 2022

TECHNOLOGY MATTERS | QUALITY CONTROL SPECIAL REPORT JESSICA LOMBARDO, EDITOR-IN-CHIEF

Non-nuclear asphalt density gauges have many advantages in that they are capable of providing density measurements very quickly and in a completely nondestructive manner, are easy to handle, and are not subject to complicated regulations.

TransTech Systems Inc.

The Tech Tools for Measuring

ASPHALT DENSITY

By using the proper equipment to measure asphalt density, contractors can help ensure the success of the roadway and keep record of their efforts 30

ASPHALT CONTRACTOR SEPTEMBER 2022

I

n-place asphalt density is one of the most important measurements used to determine the quality of asphalt when paving a roadway. A small in-place density increase can potentially lead to a significant increase in the service life of asphalt pavements. The industry relies on compaction to increase pavement density and extend pavement life, but what tools are we using to make sure compaction is being done properly?

www.ForConstructionPros.com/Asphalt

Quality control on the ground is still paramount to the success of the job. In most states, contractors are paid incentive or disincentive (financial penalties), based on the final, in-place density of asphalt on the roadway. In extreme cases of low density, contractors may be required to remove and replace the new asphalt if it does not meet density specifications. Make sure you're obtaining and tracking these numbers for success with the right tools.

Traditionally, pavement quality was measured by coring the asphalt that is placed and taking those samples back to a lab for evaluation. Not only is that timeconsuming but it also impacts the quality of the pavement. Non-destructive testing (NDT) methods on the other hand offer a good alternative to traditional tests; they reduce coring only for calibration and provide immediate test results.

There are three main types of equipment available to measure density out on the jobsite with a NDT method; nuclear gauges, non-nuclear gauges and ground penetrating radar. There are benefits and limitations to each of these methods and it will be up to your crews comfort level with each technology, and the bid specifications, to determine what you should use.

NUCLEAR ASPHALT DENSITY GAUGES According to the Environmental Protection Agency (EPA), the use of nuclear gauges is a type of industrial radiography. Radiography is the use of radiation to produce an image on photographic film. This is similar to the way a medical x-ray uses radiation to produce images of bones.

A nuclear density gauge measures the density of in-place hot mix asphalt (HMA) using gamma radiation. Gamma rays are emitted from the source and interact with electrons in the material.

By calculating the percentage of gamma rays returned to the source, the gauge can quickly and accurately measure the

www.ForConstructionPros.com/Asphalt

density and inner structure of the test material.

A nuclear density gauge offers the following key advantages over destructive density measurement (cores): • Portability. One person can easily transport a typical nuclear density gauge.

• Quick results. Most nuclear gauges allow both one and four minute readings. These are much quicker than typical densities obtained from cores which could take from several days to several weeks.

• Virtually non-destructive. Used in the backscatter mode, the nuclear density gauge is entirely non-destructive. Used in the direct mode, the gauge only requires a small penetration into the finished mat less than 1-in. in diameter and about 2-in. deep.

There are two different modes of testing that a nuclear gauge can perform: Direct Transmission Mode and Backscatter mode.

While in direct transmission mode, the sensor measures the amount of gamma radiation given off by the source rod.

The less radiation detected by the sensor the higher the material’s density. This is why it is important to select the correct depth of penetration of the source rod, as a more shallow depth will allow for more radiation to reach the sensor than if it were deeper in the same material.

PaveScan RDM is an asphalt density measurement system that provides highly accurate compaction information in real-time. With PaveScan RDM, you can quickly assess the quality of pavement during the paving process, including poor uniformity and significant variations in density. By detecting these problems, PaveScan RDM helps avoid such premature failures as road raveling, cracking and deterioration along joints.

›

Geophysical Survey Systems, Inc

SEPTEMBER 2022 ASPHALT CONTRACTOR

31

›

TECHNOLOGY MATTERS | QUALITY CONTROL SPECIAL REPORT In backscatter mode, the source is in the same plane as the sensor. The shielding within the gauge means that radiation given off the source must first be deflected by the material before reaching the sensor. This means that the more radiation detected by the sensor the higher the material’s density.

While these gauges have been widely used in the past, they use radioactive materials that may be hazardous to the health of the user unless proper precautions are taken. Users of this gauge must become familiar with the applicable safety procedures and governmental regulations. Some agencies require the use of personal monitoring devices such as a thermoluminescent dosimeter or film badge. There are also permits and training courses required for operation of this equipment.

Effective instructions, together with routine safety procedures such as source leak tests, recording and evaluation of personal monitoring device data, etc., are a recommended part of the operation and storage of this gauge.

NON-NUCLEAR ASPHALT DENSITY GAUGES Just like nuclear gauges, non-nuclear devices are used in a similar way to measure density - only without the radiation component. With increasing regulations and cost associated with using nuclear source material, non-nuclear density gauges are rising in popularity.

Non-nuclear density gauges estimate pavement density by inferring the relative proportion of air-filled voids in the asphalt from a measure of dielectric permittivity. What this means is that these devices operate based on the principles of electrical impedance for a current passing through the HMA material.

These devices have many advantages in that they are capable of providing density measurements very quickly and in a completely non-destructive manner, are easy to handle, and are not subject to complicated regulations.

In general, the non-nuclear devices have been advertised to provide significant savings as compared to a nuclear gauge. The initial cost of the

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non-nuclear device is similar or slightly less than a nuclear gauge (depending on the model), but the majority of the savings are generated through the elimination of costs associated with licensing, training and maintenance.

Some concerns have been raised around the use of non-nuclear gauges however. Researchers have voiced common themes including 1) insensitivity to actual changes in density, 2) poor correlations with other measures of density, and 3) the need for a better calibration procedure. The current consensus appears to be that while the non-nuclear gauges offer a great number of practical advantages, their results can be affected by a number of factors that may need to be addressed with future models.

A nuclear density gauge measures the density of in-place hot mix asphalt (HMA) using gamma radiation. Gamma rays are emitted from the source and interact with electrons in the material.

By calculating the percentage of gamma rays returned to the source, the gauge can quickly and accurately measure the density and inner structure of the test material.

GROUND PENETRATING RADAR TO MEASURE ASPHALT DENSITY Ground penetrating radar (GPR) works by sending a tiny pulse of energy into a material and recording the strength and the time required for the return of any reflected signal. A series of pulses over a single area make up what is called a scan. Reflections are produced

whenever the energy pulse enters into a material with different electrical conduction properties or dielectric permittivity from the material it left. The strength, or amplitude, of the reflection is determined by the contrast in the dielectric constants and conductivities of the two materials.

GPR technology has been most successfully used to determine pavement layer thickness, but has also been used to identify subsurface voids, assist with forensic investigations, locate utilities and reinforcement, evaluate degradation of bridge decks and estimate volumetric properties of asphalt pavements.

Recent research has shown that GPR has the capability to conduct a 100% scan of the new pavement and identify density deficiencies. The method also provides significantly more data than traditional density tests and calibrated GPR dielectric values correlate better with core density values than standard nuclear and non-nuclear density gauges.

The collection process can also provide a continuous profile of existing road conditions. GPR can utilize highspeed data collection at speeds up to 50 mph, thus requiring less traffic control and resulting in greater safety when compared to the handheld devices.

Results for these devices have shown a very strong correlation between the GPR-based air void measurements and the laboratory measurements, however there are also limitations with potential interference due to ambient radio noise and antenna variations.

Achieving and measuring asphalt density will continue to be an ongoing quest for perfection. No matter what method of density verification you choose, increased testing of asphalt densities will result in a higher quality pavement, allow the pavement contractors to rapidly verify that the pavement meets the specified density, reduce over-compaction of the pavement and better optimize the paving process.

For more information visit http://asphalt.com/ msfr6p

www.ForConstructionPros.com/Asphalt

Engineered Innovation.

From innovative designs to Caterpillar dealer service and support, Weiler is paving the way to success for contractors across North America. Weiler’s material transfer vehicles, commercial pavers, road wideners, windrow elevators, static split-drum compactors, soil stabilizers, rock drills, tack distributors and front mount screeds are engineered with innovative features to increase productivity while reducing operating costs.

Weiler equipment is sold and serviced exclusively at Caterpillar dealers throughout North America.

weilerproducts.com

PRODUCTION NOTES |

BRANDON NOEL, EDITOR

4zevar/adobestock.com

BATCH VS. DRUM: What To Consider Before You Buy Provided by Astec Industries

Investing in new an asphalt plant? These tips can help you find the best match

T

here’s nothing more important than having the right equipment for the job you’re trying to do.

But what you really need is not always obvious, and neither is how to decide.

In regards to the question of which type of asphalt plant you need, it might seem there are only two answers: batch or drum (continuous). However, there’s no perfect, one size fits all solution, and sorting out which is best for you and your business depends on a few things: • Type of job and production schedule that must be kept • Individual market characteristics (geography, tradition, etc) • Local and regional industry regulation • Short term and long term investment costs (equipment, maintenance, etc.)

Since using search engines on the internet can sometimes provide different results every time you use them, we spoke with industry experts to get solid answers, along with pros and cons of each.

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ASPHALT CONTRACTOR SEPTEMBER 2022

THE BASIC DESIGN Before we launch into the first factor, let’s briefly establish a minimum baseline of understanding for the different models of asphalt plants available, as well as their basic designs and function.

The oldest and most well-known style of asphalt plant is the batch configuration. Iterations of which were first used as far back as the turn of the 20th century and the most common elements of which are nearly unchanged. Multiple large cold aggregate storage bins hold sorted material based on its size and are drawn together into the drying drums, heated up, passed through multiple screens to re-sort them and stored in a tower of hot aggregate bins.

According to the mix, the various hot aggregates are weighed alongside the required amount of sand and other fillers, as well as the binder. One batch at a time, all these weighed materials are mixed together, passed into storage and eventually transported away.

Continuous plants operate in virtually the exact same manner and process, except that they bypass the mixing tower and screens, instead opting for a counterflow mixer. The sized cold aggregate is sent to the drying drums according to the design mix, heated,

blended with non-segregated RAP, fillers and the binder all in one non-stop process, that is mixed together continuously and then leaves the drum chamber and is hauled to a job site via truck.

When it comes to the continuous, also called “drum” mixers, there are three common variant configurations typically available on the market. Each relates to the way in which the aggregates are introduced in relation to the heat source and air flow: • The older continuous plants are parallel flow drum mixers where the materials proceed in the same direction as the hot gases.

• A later variant is the counterflow drum mixer which consists of either a counterflow dryer and a separate external mixer or an elongated combination dryer/mixer drum with the burner head placed part way into the drum to allow mixing with liquid asphalt to occur behind the burner, out of the gas stream. This reduces hydrocarbon emissions and increases fuel efficiency over the parallel flow drum mixer.

• The most technologically advanced version of is a double barrel drum mixer, which provides a very uniform dryer in the double barrel drum mixer gives the highest available thermal efficiency.

JOB TYPES AND PRODUCTION SCHEDULE Batch style plants may seem to be at a disadvantage, but they still offer one thing that could very well be the deciding factor right at the top: Flexibility in production, especially for small batch sizes. For the contractor who needs to satisfy multiple customers or different projects on a day-to-day or, especially,

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PRODUCTION NOTES

Provided by Astec Industries

within the same day, batch plants are extremely adaptable. It’s fairly easy for an operator to stop, switch the mixture to a new configuration, while maintaining a high quality end product. Smaller surfacing jobs spread out over an area can often reflect this need.

By comparison, the continuous plants are well suited for environments where they need to produce large quantities of consistent mix, either immediately or in the near future.

Long stretches of highway or other high surface area jobs demand a near constant flow of consistent and workable material.

A clear drawback to batch plants emerges here.

If your main concern isn’t flexibility, but quantity and timeframe, the continuous mixers dominate. Just like their name implies, batch plants obviously work in phases of interrupted work, starting at ~80/tons per hour (tph) and topping out at ~200/tph.

Their counterparts have no interruption in flow, and can double that speed to start at approximately ~400/tph and can operate, in some cases, as high as ~800/tph.

MARKET CHARACTERISTICS The types of job and customer you may want to reach are only one part of the equation. Nothing exists in a vacuum.

Because of that, it is vital to your success in plant selection to take stock and examine the specific market characteristics where you’re going to do business.

We already know that continuous mixers are more well suited for the types of job that require vast amounts of material, but that applies here, as well.

Your market may deal in these types of job at a higher percentage of available contracts, more so than in others.

Continuous plants are, also, more adept when the geography of your area requires greater portability, easily relocated closer to current job sites, like the western part of the country where

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population concentration is less dense.

Economically, the competition in the hot mix/warm mix asphalt market might be much tighter, with more producers jockeying for contracts, even still, the drum plant is the way to go.

Often times, though not in every case, those who can run the most RAP wins.

We will address RAP more in the next section, but, suffice to say, the ability to better process high amounts of reclaimed asphalt pavement is key to being competitive.

Batch plant technology can sometimes dominate in an area based on tradition, and understanding your market is the only way to know. Sometimes this can express itself as “the way it’s always been done,” but in other cases it can be economic or experience driven.

Beyond that, there are certainly markets that produce a higher demand for smaller quantities of constantly changing mixtures, so it is important to take a proper inventory and do your due diligence.

REGULATION The government can often be the greatest source of unexpected challenges in your process of selecting a new asphalt plant. Why? The easiest answer is that they make the rules. The more nuanced answer is that those rules vary, sometimes widely, between municipalities (if you’re working in just one state) and, especially, across state lines (if you’re a multi-state operation).

The fastest growing and changing area of regulation is in regards to sustainability and the environment.

The most common way this effects your decision concerns reclaimed asphalt pavement (RAP). There are places where RAP use is required, and the percentages have to be measured accurately.

Both styles of plant can utilize RAP and incorporate it with virgin aggregate, but the drum design does so simply and efficiently. A batch facility needs a separate dryer and exhaust system for its RAP content. Continuous systems are much more RAP “friendly” in design.

They combine the sized aggregates and

RAP once in a single chamber along with the binders, all without interruption.

RAP usage is not the only environmental concern, however, there are noise ordinances, air quality, odor, emission standards, as well as thermal efficiency standards that must all be taken into account. It’s important to research these thoroughly. Where they come into play, once again, the continuous/drum plants have the bottom-line edge. Ton-for-ton, drum mixers can produce the same amount of mix that a batch plan does for less energy.

INVESTMENT COSTS This brings us to our final factor. You might wonder why we saved the costs as the final section to cover, but the reason is rather simple. It doesn’t really matter how much the equipment costs, it doesn’t matter how inexpensive it is at face-value, if it doesn’t do the job you need it to do, and/or it’s going to be a drain on resources down the road.

According to experts at Astec Industries, capital investments for continuous plants are lower for equivalent production rates and RAP percentages, compared to similar batch systems. This doesn’t mean that their dollar amount prices are always less, but that when you take into account those factors, you’re getting more value per ton of mix produced. So, in cases where the budget is ultimately very tight, a batch system may still win out.

Also, repair and maintenance costs tend to be lower on the drum mixing plants due to lower “plant iron,” which receives less wear and tear over time due to a reduction in direct contact with the hot aggregate.

There are a lot of advantages to the continuous/drum mixing plants, but no one answer to fit every contractor in every situation. The final choice will always be about how some best “fits” your needs, because there’s no way to account for everything, but you can be confident you made the most informed decision.

For more information visit http://asphalt.com/2wp4nr

www.ForConstructionPros.com/Asphalt

JOBSITE INNOVATIONS |

JESSICA LOMBARDO, EDITOR-IN-CHIEF

What

ROLLER Should I Use?

There are many factors you need to consider before choosing a roller for your crew and jobsite application.

Selecting the proper roller for the application, and using it correctly, will ensure optimal surface compaction on your construction projects

• Type of material that will be compacted (dirt, sand, gravel, asphalt, etc.)

• Budget • Size of area • Site layout (open area or confined areas) • Transportation to and from the job site Take a look at the types of rollers available and decide when, where and how to use them on your projects.

here are many different types and styles of rollers available for compaction, but not every roller is right for every job.

Factors that you should consider when choosing the right roller for your job include:

SOIL COMPACTION When a new road or structure is being built, the foundation will need to be compacted before final construction can begin. The new surface is often loose and unstable, and needs to be compacted before structures are built upon it.

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There are two main types of soil compactors to accomplish this task.

Smooth Drum: These rollers consist of large, smooth steel drums that use a combination of impact, vibration and static pressure to compact materials such as sand, ballast and gravel. They are the most effective in compacting silty or sandy soils with the fewest passes.

Sheepsfoot or Padfoot Drum: This style of roller has many raised lugs called "feet" on the roller drum.

The feet provide a tamping action and change the surface area of the roller

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JOBSITE INNOVATIONS

Different styles of asphalt rollers are used during different phases of compaction of the pavement.

Smooth Drum Rollers: This style of roller is most commonly used for asphalt compaction but varying styles and technologies can make them more suited for different applications.

Static Rollers:

drum, which enables the drum to apply more pressure per square inch.

The roller operator can increase the pressure on the feet as needed by filling the drum with wet sand and other materials. Typically sheepsfoot rollers are used with silty or heavy clay or cohesive soil surfaces.

Single or Double Drum Style: Soil compaction rollers can either be tandem (double drum) or single (threewheeled) depending on the project needs.

Tandem rollers have drums in both the front and the back for additional power and faster compaction times.

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ASPHALT CONTRACTOR SEPTEMBER 2022

However, the lack of tires results in less stability and traction than single drum versions.

Three-wheeled or single drum rollers have a drum in the front and specialized tires in the back, allowing them to roll over almost any surface.

ASPHALT COMPACTION Many times asphalt roadways are put down over soil and there are many specialized rollers to use during different phases of asphalt compaction.

These can come in single drum configurations, but you usually see tandem rollers operating during asphalt compaction.

Static rollers are used to compact many different types of material, but are used on some jobsites for asphalt compaction. Static rollers are sometimes seen as the final roller in the paving train, used for finish rolling. The primary purpose of finish rolling is to obtain the last little bit of density and to remove the marks, if any, left by the first and second rollers.

When needed, finish rolling should be accomplished with mix surface temperature above 175° F.

Vibratory Rollers: Vibratory rollers are almost identical to smooth wheel rollers except they feature a specialized vibrating component. As the roller compacts and flattens the surface, it will vibrate and increase the compactive effort.

Double drum vibratory rollers operate close behind the paver to obtain the initial compactive effort while the mix is still hot.

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JOBSITE INNOVATIONS

This “breakdown” rolling, completed with a vibratory roller, should be completed before the surface temperature of the mix falls below 240º F. The breakdown roller should be operated at the highest possible frequency level available for the particular make and model of roller and at an amplitude setting that is dependent on the thickness of the asphalt mat being placed.

and there are no repeated impacts to the surface for compaction.

This provides more compaction force than static rolling but less force than traditional vibration. Tandem rollers with one oscillation drum and one vibrating drum achieve at least the same degree of compaction as double vibrating drum rollers, but with fewer passes.

These types of rollers are suited for compacting thin lifts, tender mixes, joints, bridge decks or when working near structures. Oscillation is also useful for joint compaction as most asphalt contractors have to deal with hot and cold lanes when they pave.

Rammers are handheld and are best used for small jobs in tight areas. Due to their comparatively lightweight, they can be hand or machine operated, which allows deep vibratory compaction.

Vibratory plate compactors are used to increase the density of a variety of soils and fill any voids. Because they are walk-behind compactors and are smaller in size, these compactors are best used for tight spaces where large equipment can’t reach.

Pneumatic Rollers:

Intermediate rolling is usually done with a vibratory roller as well and must be accomplished immediately after the initial rolling is completed.

Oscillating Rollers: Oscillation is a technology developed to help increase compactive effort even further. With these vibration systems, the drum stays in constant contact with the material allowing the roller to deliver dynamic compaction energy to the asphalt layer as an alternative to traditional vibration. Instead of vibrating the pavement up and down, oscillating rollers stay in contact with the surface,

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Pneumatic rollers use smooth pneumatic-tired wheels that overlap instead of steel drums for compaction. Pneumatic rollers use static pressure in both vertical and horizontal directions to reduce air voids in material which creates compaction. This is often referred to as kneading or manipulations and helps bring compaction to materials differently than traditional static rollers or vibratory rollers.

These compactors are mainly used as one of the last steps for compacting both soil for road work and asphalt for sealing purposes.

When a pneumatic tire roller is used as an intermediate roller, it is necessary to keep the tires at the same temperature as the mat being compacted — otherwise the rubber tires will pick up some of the mix from the mat. So when using a pneumatic roller, don’t allow the roller to sit and wait for long periods of time as the tires will cool.

COMPACTION FOR ALL SIZES Road rollers aren’t the only construction tools used for compaction work. Other types of compaction equipment include the rammer and the vibratory plate.

Trench rollers, also called multipurpose compactors, perform well in cohesive soil types that can be very difficult to compact (such as clay). Trench rollers can compact high moisture content in clays by utilizing powerful compaction energy and the kneading effect from their padfoot drums.

Trench rollers get their name because they are often used to compact the soil in trenches. Trench rollers are popular because they can be maneuvered by using a remote control - the operator does not stand or sit on the machine while it moves.

Compaction is an important part of any project. Understanding the benefits of each roller can make choosing the right one for your project more efficient.

Be sure to always properly train your operators to ensure they are making the most of their work and compacting each surface efficiently to achieve density. Under compaction can cause decreased strength, reduced fatigue life, accelerated aging/decreased durability, rutting, raveling and moisture damage.

While over-compaction can affect the integrity of the material and damage the roller.

For more information visit http://asphalt.com/z8shne

www.ForConstructionPros.com/Asphalt

PRESERVATION UPDATE |

JESSICA LOMBARDO, EDITOR-IN-CHIEF

How Can We Improve Pavement

Asset owners have more pavements to maintain than money to do so, which is why the industry needs to continually deploy proper preservation techniques - one layer at a time - to protect these investments

O

ver the years, the asphalt industry has been working hard to improve the longevity of the pavements we drive on. We have acknowledged the fact that the right treatment, on the right pavement, at the right time is much more cost-effective

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ASPHALT CONTRACTOR SEPTEMBER 2022

than removing and replacing an asset once it's beyond repair. We as an industry know this, the smart asset owners know this, and yet many pavements are left to deteriorate while new roads and other needs take priority.

"Asset owners have more pavements in need of preservation than money to preserve them," John Hickey, executive director at the Asphalt Pavement Association of Oregon said. "Managers set short-term budgets in almost every sector – and that has permeated the public infrastructure sector even though the considerations driving how we budget for infrastructure necessitate a long-term perspective. Even if pavement preservation budgets initially are sufficient, funding often gets diverted to what is perceived as more pressing needs. Maybe it’s a new pedestrian bridge or light rail system – regardless of

the benefit those new assets may confer, they are often paid for out of existing infrastructure funding without consideration for the long-term effects on the overall system. We tell our kids they can’t get new things until they learn to take care of what they have, but we don’t live by that rule when it comes to public infrastructure."

And the problem isn't getting any better. U.S. roads received a D grade in ASCE's 2021 Report Card, retaining the D they got back in 2017. Breaking down the nation's roads into four grading categories, 41.9 percent are categorized as “good,” 15.6 percent as “fair,” 22.6 percent as “mediocre” and 20.1 percent as “poor.”

So why has there been no improvement? The simple answer is perception.

"Pavements show deterioration relatively slowly and it is easy to think

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Typically, a thin asphalt overlay is a surface mix of 1.5 inches or less placed on a well prepared surface.

they will last another season or two, which will give us time to figure out a funding," Hickey says. "The obvious problem is that the newly added infrastructure often costs more than we initially estimate and it also requires preservation and maintenance. Pavement managers are in a constant battle advocating for pavement preservation funding in a system where the people who allocate the dollars want to show constituents something shiny and new."

In order to make impactful change on the lifespan of our pavements, the industry needs to continually push a long-term preservation strategy and deploy a "fix it first" mentality when it comes to our roadways.

FIX IT FIRST According to the National Center for Pavement Preservation, there are nearly 4 million miles of paved public roads in the United States, valued at $1.75 trillion. The roads and other pavements in America are a huge investment and are vital for moving people and goods in an efficient manner. Yet we let them fall into a state of disrepair.

Unfortunately, there is very little new funding in the Infrastructure Investment & Jobs Act (IIJA) specifically dedicated to repair and no new requirements on highway monies for prioritizing repair

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PRESERVATION UPDATE

on roads and bridges. Overall the law doubled down on the practice of giving states immense flexibility with the bulk of their money in hopes that they use that flexibility to prioritize repair. And states should consider a "fix it first" approach to using these funds.

"In 2017, the Oregon Legislature passed a major infrastructure funding bill that had multiple funding mechanisms to adequately pay for, among other things, improving bridge seismic resiliency and preserving pavements," Hickey says. "But, the final bill included earmark projects in primarily urban areas, which are notorious for taking a long time and being expensive."

As inflation continues to be a challenge for State DOTs, if they truly want to do more with less money, preservation is the answer.

FINDING LASTING SOLUTIONS DESPITE RISING COSTS If inflation wasn’t bad enough, as pavement conditions decline, pavement preservation costs increase. So what are the solutions to keep up with continual pavement decline?

In Oregon, it's Thinlays.

"Thinlays are the most beneficial pavement preservation technique," Hickey says. "Added structure and improved smoothness are probably the two Thinlay benefits that are most relevant since we need pavements to support increased loading. Plus improved smoothness can result in a significant reduction in greenhouse gas emissions from vehicles."

Thin asphalt overlays are a reliable way to restore smoothness and drivability to an aging pavement, while correcting distresses and even adding structural

value in some instances. Typically, they are a thin asphalt overlay of 1.5 inches or less placed on a well prepared surface.

The pavement being overlaid may be milled or unmilled, but it should not show signs of structural distress requiring a more extensive rehabilitation.

The decision to apply a thin overlay to an existing pavement surface should be made only after a careful evaluation of the pavement condition and the elimination of the need to perform a structural rehabilitation. Careful consideration also needs to be made for the entire pavement maintenance program, otherwise costs can creep up on you.

"The primary challenge in implementing a Thinlay pavement preservation program is the fact that they often have a higher initial cost and it is hard for pavement managers to overcome the budgeting hurdles described above," Hickey says. "Marion County in Oregon is an example of an agency that has had success implementing a Thinlay program, which has improved pavement conditions and set the County up for lower pavement preservation costs over the long-term."

PERPETUAL PAVEMENTS ONE INCH AT A TIME One of the biggest benefits of asphalt pavements is their ability to be built upon, year over year, while maintaining structural strength.

"Perpetual Pavement" is the name coined to describe a layered, flexible pavement design and construction concept. Application of the concept produces a deep-strength asphalt pavement that can resist structural fatigue distress for a long time (at least 50 years) and, thus, results in a long-lived pavement.

These long-lasting structural bases can be economically maintained by replacing just the surface, never needing total removal and replacement.

Perpetual pavements are designed to develop distresses from the top-down, rather than from the bottom-up. This preserves the integrity of the bottom layers of the pavement structure,

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PRESERVATION UPDATE

and confines damage to the top layer where it can be easily managed without requiring full-depth repairs or major rehabilitation. In fact, we now know that asphalt pavements can be designed to never develop bottom-up

fatigue-related distress, regardless of how many loads are applied to the pavement, and how heavy those loads may be.

By confining damage to the top layer of the pavement, maintenance and rehabilitation costs over the life of a perpetual pavement are significantly reduced. And given the fact that the lower layers of pavement are preserved, the structural life of a perpetual pavement is on the order of 50 years or more, rather than the 20-year life

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expectancy that has traditionally been the standard.

The cost savings and increased life expectancy are huge benefits that smaller agencies and local governments can’t afford to ignore. Both high-volume highways and interstates and lowvolume county roads and city streets can reap the benefits of perpetual pavement too, even if those structures were not originally designed or built to perpetual specifications. Perpetual pavement can, in fact, be achieved by increasing pavement thickness “one inch of asphalt at a time.”

For local agencies with limited budgets, that extra inch of asphalt will pay for itself many times over by reducing long-term maintenance costs and doubling the life expectancy of the road itself.

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THE LAST EXIT |

BRANDON NOEL, EDITOR

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Does A Labor Strike in Chicago Signal Larger Trends?

Will the asphalt industry be the next to face a labor reckoning? What unfolded in Chicago might be a sign of things to come

T

he local chapter of the International Union of Operating Engineers (IUOE), Chicago 150, went on strike at the beginning of June. It turned into a two month stand-off. Municipal projects were delayed or put on hold entirely. This came in response to what the union described as "unfair labor practices" by the Chicago Area Aggregate Producers Association (CAAPA), a consortium made up of the three separate companies Lehigh Hanson, Vulcan Materials and Lafarge Holcim, which collectively operate 35 quarries across the state of Illinois.

GETTING TO THE TABLE At the start, it appeared that the strike might be resolved somewhat quickly.

The Northern Illinois Material Producers Association (NIMPA) came to the bargaining table and reached a new agreement for a contract in only four days. The negotiations with the CAAPA were not as straight forward.

Union officials told Asphalt Contractor that after more than a dozen negotiation attempts, no deal was reached. Union communications director Ed Maher said as many as eight days passed in between sessions, a sign the union interpreted as an unwillingness to come to terms.

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FALLOUT AND ULTIMATUMS As a result of these and other delays, the union filed suit with the National Labor Relations Board (NLRB) charging the CAAPA with "Refusal to Bargain/Bad Faith Bargaining (including surface bargaining/direct dealing)" on July 6, a month into the strike.

The CAAPA's response came on the evening of Friday, July 15, when they submitted a "final offer" that union president James Sweeney described as failing to address previously stated priorities and that it, "contained numerous significant deviations from important language changes that both sides agreed to during negotiations."

And in what appeared to be an effort to strong arm the union into ratifying the deal, it came with a specific provision.

Were it not to be signed by the end of the day, July 17, the companies involved would withdraw all owed backpay from the striking workers.

In a letter posted to the union's website, Sweeney said, "This new offer is in no condition to be voted on, but management is attempting to use retroactive pay as leverage to force members to accept it."

Finally, on July 26, the member of the IUOE voted unanimously to accept a new agreement. They earned a 16% wage increase over the next 3 years, amongst other benefits and adjustments.

An enormous win for the union. Yes, strikes like these can be a temporary inconvenience to the local area, but the history of organized labor in the U.S. is filled with brave men and women risking their livelihoods to make a better future for their families.

THE RISE OF NEW LABOR The real question the situation in Chicago between the Local 150 and

the CAAPA represents to our industry: Is it on the brink of what other major industries across the United States are going through?

It's no secret companies like Apple, Amazon, Starbucks, and recently, Chipotle and Target are all experiencing new movements of collective action.

Many of these mega-corporations spend millions in anti-union campaigns, while also using "labor shortages" as reasons for store closings, limited hours of operation or poor customer service.

What we must face, however, is a new labor reality.

The COVID-19 pandemic sparked a fresh awareness within the labor force, and the surge in demand from all areas of industry highlights labor's value and importance. Business owners have to wrestle with the tension between the need for more workers, while the available workforce, recognizing this greater value, holds out for better wages, benefits and working conditions. In the wake of the last recession in 2008, the American laborer felt lucky to have somewhere to work at all. Benefits were a bonus. As things have a tendency to do, the pendulum has swung in the other direction.

Every American in the nation is feeling the burden of rising costs and creeping inflation. Bare-bones wage increases are effectively pay-cuts, when the costs of living skyrocket, as they have over the last two years. These economic forces are felt by ownership and management too, of course, but the lion's share of their effects historically get passed down to the bottom of the chain. For now, it seems, the American worker fights for a more well distributed curve.

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