Aggregate & Recycling Section

from Southeast 19, September 21, 2022

Attachments & Parts Section

Pages 40-52 Aggregate Production and Recycling Section

For more information on crushing, screening and recycling equipment, visit CEG's Web site at www.constructionequipmentguide.com. Astec Industries Launches

GT2612V Mobile High Frequency Screen Plant

The mobile GT2612V is manufactured on a heavy-duty, welded steel main frame with a channel cross section. A walkway around the screen and remote grease lubrication for ground-level access make maintenance simple.

Astec Industries’ Materials Solutions Group has launched its newest mobile high frequency screening plant, the GT2612V.

The plant features a 2612V Vari-Vibe high frequency screen. The two-deck, 6 by 12 ft. (1.8 by 3.7 m) screen uses a unique rotary tensioning system that allows for some of the quickest screen media changes on the market, giving producers more uptime, according to the manufacturer.

The 2612V also has deck-mounted, variable speed hydraulic vibrators, a hydraulic mechanism for varying operating angles, a fines collecting hopper, top and bottom deck discharge chutes and an aggregate spreader. The high frequency screen can quickly and efficiently size crushed stone, recycled asphalt pavement, sand, gravel, coal and a variety of other materials.

The plant includes a large hopper with a capacity of 8 cu. yds. that is equipped with 6-in. sloped grizzly openings and a remote tipping grid. The hopper also includes foldable wings and hydraulic support legs. The variable-speed, 48-in. wide belt feeder features a high-torque hydraulic drive, full length impact bed, rubber lagged head pulley and self-cleaning wing tail pulley.

The screen plant is equipped with four conveyors: a delivery conveyor, two side conveyors and a fines conveyor. All conveyors feature a variable-speed hydraulic drive and easily fold for transport. The GT2612V is powered by a Caterpillar Tier IV Final, 136 hp (101.4 kW) engine, while engine mounted hydraulic pumps operate all plant functions. The plant includes a PLC control system with pendant remote controls for the tracks.

Additional options for the GT2612V mobile plant include: engine alternatives (Caterpillar Tier III and Stage V) 15-ft. hopper/feeder in lieu of standard for additional capacity, heavier-duty grizzly section with replaceable grouser bar cartridge, vibrating grid, bridge breaker, vinyl dust cover, standard steel screen cloth, engine enclosure filter kit, engine block heater, immersion heater, wireless track remote, telematics system, auto-grease system and more.

For more information, visit www.astecindustries.com. 

The Sandvik UK373 offers an electrically driven, closed-circuit crushing solution fully assembled on a quad axle trailer frame.

Born in the USA, Sandvik’s UK373 wheeled crusher offers a complete processing solution. Built with Sandvik global quality standards, this highly productive machine is driven by quality and built for rock. The Sandvik UK373 offers an electrically driven, closed-circuit crushing solution fully assembled on a quad axle trailer frame. This unit was equipped with the Sandvik CH440 and a three deck 6 by 20 ft. heavy duty screen with high G force, to ensure outstanding efficiency, high productivity and reliability. The Sandvik CH440 is suitable for a high-capacity secondary application or a high-reduction tertiary or pebble-crushing application, and it can be matched to changes in production through the selection of crushing chambers and an eccentric throw. This flexibility means that it’s suitable for a wide range of applications, according to the manufacturer. The UK373 benefits from user friendly features such as hydraulically adjustable settings, and a choice of different crushing chambers and throws. This enables fine tuning to match your required specification and maximum output. Sandvik Rental Services is entering the U.S. market with a structured rental offering that meets the needs of customers that are looking for short-term off-balance solution to fill production gaps or expand their operations but want to minimize the risk. The company is starting by offering Sandvik DX700 tracked drills and an offering that sees machines rented from as little as just one month. Sandvik’s fleet of all-new machines are supported by manufacturer service contracts and genuine parts for the duration of the rental agreement, while Sandvik rock tools also are available. The company is launching its service in initially five states: Tennessee, Kentucky, Georgia, North and South Carolina. For more information, visit www.rockprocessing.sandvik.  Kleemann Offers Higher Diversity for Cone, Impact Crushers

Kleemann’s mobile cone crusher MOBICONE MCO 90(i) EVO2 and the mobile impact crusher MOBIREX MR 110(i) EVO2 can now be fitted with a double-deck post screening unit as an option.

Cone crushers are mainly used in hard stone, impact crushers in soft to medium-hard stone and in recycling. A very high product quality is expected from both plant types. Due to the new optional double-deck post screening unit, it is now also possible, with a single machine — without the use of an additional screening plant — to produce two classified final grain sizes. Double-Deck Post Screening Unit Guarantees

High Application Diversity, Flexibility

The large screening surface makes effective screening possible especially for grain sizes below 7/8 in. The discharge height of the fine grain conveyor is designed for a maximum stockpile volume. Oversize grain can be processed in a closed material circuit via a return conveyor.

As an option, the conveyor can be swivelled hydraulically by up to 100 degrees, which also makes side discharge possible. A kidney-shaped stockpile can thus be created manually.

If an application is only to produce one classified final grain size, the post screening unit can simply be used as a single-deck version.

Wind Sifters for Effective Cleaning

As the MOBIREX MR 110(i) EVO2 is frequently used in recycling applications, wind sifters are used here as an

The MOBICONE MCO 90(i) EVO2 and MOBIREX MR 110(i) EVO2 can now be equipped with an optional double-deck post screening unit.

www.kellytractor.com

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2801 Reese Rd Davie, FL 954-581-8181 9651 Kelly Tractor Dr Ft. Myers FL 9-23 693-9233

5460 Okeechobee Blvd West Palm Beach, FL 561-683-1231

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More than 80 barges and two dozen cranes dot the watery landscape, as construction crews continue work on Florida’s $865 million Howard Frankland Bridge (HFB) replacement project. The new bridge is being built to the north of the current southbound bridge and will consist of eight lanes that include four general purpose lanes, two northbound express lanes, two southbound express lanes and a bicycle/pedestrian path. The existing southbound bridge will be converted to become northbound I-275, and the existing northbound I-275 bridge will be removed as part of the multi-year effort.

“While navigating the numerous entities and agencies that are involved does present a challenge, this JV [a joint venture between Archer Western and Traylor Bros.] and Atkins team are both well suited for the task,” said Bill Jeffries, project administrator, HFB Replacement. “Like any project, we have had our obstacles, but it’s coming along nicely.

“As part of the department’s large work program for the area, this project will add much-needed capacity for the entire region. We are proud to be delivering this high-profile project for the Florida Department of Transportation [FDOT] and the residents of Tampa Bay.”

The aging HFB provides a crucial link between Pinellas and Hillsborough counties and serves as the central bridge spanning Old Tampa Bay from Clearwater/St. Petersburg to Tampa. The structure is the most traveled of the Bay Area bridges, carrying an average of 179,5000 vehicles per day across Tampa Bay. It is one of three bridges connecting Pinellas and Hillsborough counties, the others being the Gandy Bridge and the Courtney Campbell Causeway.

According to FDOT, the new bridge design will improve incident management in emergency response situations, addressing safety concerns raised by the community during the outreach process, including hurricane evacuations.

“Currently, the project is anticipated to finish in late 2025,” said Jeffries. “However, there are still many potential impacts to the project schedule outside of the contractor’s control, such as hurricane seasons and material shortages.”

Jeffries noted that, to date, the project has had little impact on the motoring public.

“In the future, there will be shifts in traffic patterns to accommodate different phases of the project. This team and our media partners do an excellent job making sure those changes are seamless, and that motorists are notified ahead of time.”

The biggest challenges tied to the project involve foundation installation, due to the highly variable subsurface geology.

“The lengths of the piles are almost impossible to predict. For example, we have had a pile in a footing achieve capacity at 72 feet, and the pile next to it, six feet away, did not achieve capacity until 220 feet.”

Jeffries noted that weather and safety are the primary concerns.

“The project has a robust severe weather management plan that’s implemented for tropical storms and hurricanes to not only protect our assets, but the existing bridges, as well. Project management is constantly watching the weather every day to ensure the safety of our workforce. We use multiple weather alert systems to halt work activities for thunder-

By Cindy Riley CEG CORRESPONDENT storms and high-wind events.”

The project is 60 percent complete as far as foundation installation and 50 percent complete with substructure construction. Permanent causeway bulkheads are virtually finished. Completions of each bridge component, such as foundations, substructure and superstructure, are considered major milestones for the JV.

There are more than 1,700 girders and 2.7 million sq. ft. of bridge deck to construct. Currently, causeway embankment construction is taking place, along with foundation installation, substructure construction, superstructure girder erection and roadway construction on the Pinellas Causeway.

Regarding pedestals, pier caps and piling and footings, said Jeffries, “There are a lot of them. These elements are cast-in-place with concrete being delivered from the existing southbound bridge and conveyed to the point of placement with concrete buckets and cranes.