J02- Eugen Florescu - Nuevas tendencias de Innovación en Pavimientos de Hormigón

Nuevas tendencias de Innovacion en Pavimientos de Hormigon Eugen Florescu, Ph.D. Gerente de Proyectos Vial, LafargeHolcim

Facts and figures Facts and figures

~80 countries

~2,300 operating sites

~75,000 27.5 employees billion CHF net sales All figures Full Year 2018

SIX and Euronext

Listed on

Š 2019 – LafargeHolcim at a glance 3

Innovation and R&D to Serve Roads Projects Unique Roads R&D Capabilities ▪ The largest R&D lab in the industry (Lyon, France) ▪ Local construction development labs worldwide (Algeria, Morocco, etc..)

Developing the Right Solution For Your Road ▪ New pavement coating ▪ All Soils re-employment ▪ Environmental remediation ▪ Low traffic solutions

▪ Asphalt formulation optimization

Expertise ▪ Road business developers close to your projects ▪ Pavement designers ▪ Soil analysis labs ▪ E-platform & sourcing master data

Our approach is not about cement, aggregates or RMX – it is about road projects!!!

Road projects are complex with multiple interfaces

Projects often fail on materials issues..

Infrastructure reflects dynamism

Quality is longevity‌

A road design is a material choice

2016-2019

Road Research at Innovation Center The Past, Present & Future

2016-2019

Difficult Soils

2013-2014

2015-2018

2016

Innovative Coating

Safety Barriers

Fast-track Concrete

2014-2015

2011 - 2014

2011

2009-2014

Green Binders

Sourcing & Design e-tool

Asphalt mix design

2014-2015

Soil stabilization Remediatio n

RollerCompacted Concrete

Pervious Concrete

2011 - 2013

2009 - 2012

Unbound Materials

Asphalt Recycling

2009 - 2011

Aggregates Treatment 2009 - 2012

Warm Mix Asphalt

Š LafargeHolcim 2015

South America Success Stories Soil stabilization - Galapagos • Patrimonio Natural de la Humanidad • 41 Km de mejoramiento de vías en islas San Cristóbal, Santa Cruz e Isabela • 230,000 m2 de vialidad • San Cristóbal: 30,000 m2 • Santa Cruz: 85,000 m2 • Isabela: 115,000 m2 • Cronograma ajustado de ejecución, 120 días • Escasez de material granular • Dificultad logística para constructores, retrasos en ejecución de obras • Solución duradera y no puntual • Visibilidad de gestión de resultados, Consejo de Gobierno del Régimen Especial de Galápagos (CGREG)

South America Success Stories

Solo para uso interno

Š 2019 Holcim Ecuador S. A.

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South America Success Stories Range of products for soil stabilization Agrovial es un ligante hidrรกulico desarrollado especialmente para la estabilizaciรณn de suelos y caminos rurales.

Es una soluciรณn rentable e innovadora, que permite estabilizar suelos rurales incrementando la resistencia y durabilidad de los caminos, sean estos para uso peatonal, animal o vehicular.

Genera un mejor comportamiento ante el desgaste por el trรกnsito, evitando la formaciรณn de baches y mejorando la transitabilidad de los caminos en la temporada de lluvias.

South America Success Stories Range of products for soil stabilization Basevial es un ligante hidráulico desarrollado especialmente para la estabilización de suelos.

Es aplicable a bases, sub-bases y subrasantes de pavimentos tanto rígidos como flexibles.

Es una solución rentable e innovadora, que permite dotar al suelo existente de las propiedades físicas, químicas y mecánicas requeridas para su uso, adecuándolo para las aplicaciones más exigentes, asegurando a la capa tratada una durabilidad prolongada y ahorrándole al cliente costos tanto en la fase de ejecución como de mantenimiento a medio y largo plazo.

South America Success Stories Thin Concrete Pavement on Piady Project ▪ Improve project durability by redesigning pavement using Thin Concrete Pavement (TCP) design methodology.

▪ TCP Design: 20 cm of Cement Treated Base (CTB) & 20 cm of 4,5 MPa Flexure Strength Concrete ▪ Early Engagement with all project stakeholders (Design Phase) ▪ Holcim Ecuador experience in paving with state of the art equipment

Strong relationship with TCPavements (Chile) • We believe that TCP represents a revolutionary solution for the road industry • Starting the co-operation with TCP almost four years ago, promoting the solution itself, but also some other technical solutions (soil stabilization, CTB) • We organized joint seminars in quite a number of countries (Colombia, Ecuador, Austria, Greece, Philippines, Indonesia), and there still are a number of countries in the Group that are interested in rigid solutions, and might ask for TCP training: Jordan, Egypt, Algeria, Mexico

Innovative pavement structure

Patented solution

Innovative Pavement Structure

Very thin innovative top layer

Bottom layer with affordable concrete Traffic simulation tests: → Excellent results after 5 million passes of a heavy vehicle tire (equivalent to 20 years traffic) → Pilot on-going © LafargeHolcim 2018

Drive safer High skid resistance ➔ The macro and microtexture created by the concrete mixture optimization help to reach a high and durable skid resistance

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Wehner & Schulze test, according to the EN 12697-49 standard

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AC: Conventional Asphalt Concrete

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VTAC: Very Thin Asphalt Concrrete

•

SMA: Stone Mastic Asphalt © LafargeHolcim 2018

Drive safer Faster water drainage ➔ High volume of connected voids allows a quicker superficial drainage: ➔a good skid resistance by reducing the aquaplanning ➔a sufficient driver’s view by reducing water splash and spray risks

© LafargeHolcim 2018

More comfortable Noise absorption • Laboratory showed that noise absorption of Innovative Coating is comparable to porous asphalt and porous elastic epoxy based concrete

➔A large room to design competitive concrete pavement for silent roads (urban zone passing sections) *PoroElastic Mat: Pervious mixture made of elastic aggregates and epoxy, PERSUADE (European Research Project)

Noise absorption measurement by Impedance tube (ISO 10534-2) covering the road traffic noise frequency (850-1600 Hz) © LafargeHolcim 2018

More durable roads High bonding strength

• Good bonding to the bottom layer is key factor to have a long lifespan of wearing course without cracking and raveling problems

NCPTC recommended limit

➔Obtained by a wet-on-wet placing without a tack coat

Bonded

Unbonded

Direct tensile strength has to be between 0.5 and 2.5 MPa (obtained by the pull-off test- NF EN 1542 standard) then the bonding is considered good enough (NCPTC, May 2014).

© LafargeHolcim 2018

More durable roads High raveling resistance ➔ The use of special admixture helps to increase the raveling resistance to keep the wearing course long lasting versus the deterioration of vehicle’s tyres

Very good raveling resistance pervious concrete

Cantabro test, according to the ASTM C1747

© LafargeHolcim 2018

More durable roads High scaling resistance

➔Mix design (including special admixture) improves the scaling resistance versus the de-icing salt attack which is very critical for pervious concrete Innovative Coating @80 cycles

Conventional Pervious Concrete @10 cycles

• With de-icing salt • Severe saturated condition (R&D-RES576) • Temperature varies from +10°C to -20°C

© LafargeHolcim 2018

More durable roads Lower temperature sensitivity • Elasticity of concrete is maintained at different frequencies and at different temperature level ➔The Innovative Coating is not affected by the temperature variation ➔ no rutting

Complex modulus test for asphalt concrete method (NF EN 12697-26).

© LafargeHolcim 2018

Customized choice of colors Easy for color and texture design • Easily colored by the ordinary concrete pigments • Easily textured optimisation

by

mix

design

Cold manufacturing and placing ➔ Energy saving with no heating requirement ➔ Easy cold placing without smell nor heat

© LafargeHolcim 2018

Environment friendly

Germany case

• •

Studies the full life cycle by following ISO standardised procedure (ISO 14040 and 14044, and EN 15804) Different models to cover albedo, lighting and carbonation, or with the extra fuel consumption due to pavement vehicle interaction (deflection, texture and roughness) from WB, universities and public laboratories. © LafargeHolcim 2018

More durable roads Long lifespan face to heavy traffic • A concrete pavement structure with a Innovative Coating layer was tested by an Accelerated Pavement Testing by French Public Infrastructure Laboratory (Ifsttar) in order to: ✓Test the durability of this solution under a real traffic loading of a semi - single axle of 6.5 tons

✓Observe joint distress

Construction

Accelerated Pavement Testing (FABAC machine of Ifsttar) © LafargeHolcim 2018

More durable roads Long lifespan face to heavy traffic (continued) • Test was achieved at 5 million cycles loaded (@ end of September 2017) ➔Slab is in good condition without any damage nor rutting ➔Joints are in good without any raveling

condition

© LafargeHolcim 2018

More durable roads • Tested by French Public Infrastructure Laboratory (Ifsttar) with real traffic loading of a semi - single axle of 6.5 tons ➔ 5 million cycles loading, it means…

in French method Example: this wearing course can withstand a heavy traffic* for highway for 21 years *Classe T1 with 500 heavy lorry per day per lane

3 cm of innovative coating

in US AASHTO method

25 cm of C30/37 S1

~ 16-24 years of highway traffic*

12 cm of unbound aggregate 0/31.5

*1500 to 2500 heavy truck (32T) per day

• 5 million cycles of 13 ton single axle (29 kips) ~ 40 millions of ESAL (18 kips) according to AASHTO standard • In general, interstate highway pavement is designed for 50 to 80 millions of ESAL for 30 years!!! © LafargeHolcim 2018

On going full scale test/ pilot in 2019

• Poland • Entraigues, France • Amberieu, France

© LafargeHolcim 2018

Slab construction for Accelerated Pavement Test (FABAC)

| © LafargeHolcim 2018

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Slab construction

© LafargeHolcim 2018

Slab construction

© LafargeHolcim 2018

Slab construction

© LafargeHolcim 2018

Slab construction

© LafargeHolcim 2018

Slab construction

© LafargeHolcim 2018

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Slab construction

© LafargeHolcim 2018

Slab construction

© LafargeHolcim 2018

Joint sawing

© LafargeHolcim 2018

Joint sawing

© LafargeHolcim 2018

Joint sawing

© LafargeHolcim 2018

Joint sawing

Back © LafargeHolcim 2018

© LafargeHolcim 2018

Surface characterization from Accelerated Pavement Test (FABAC)

| Š LafargeHolcim 2018

Surface characterization Visual control

Š LafargeHolcim 2018

Surface characterization Average texture (NF EN 13036-1) ➔ Macrotexture characterization

➔ Satisfactory results after 5 m.o of traffic (compared to the initial value)

Asphalt typical range

Test at 1 million was carried out in moisture condition, where bullets were formed © LafargeHolcim 2018

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Surface characterization Skid Resistance Tester (Essai au pendule SRT - NF EN 13036-4)

➔ Microtexture characterization at low speed

➔ Microtexture is decreased but still at good level ➔ Cleaning is needed to maintain a good skid resistance

© LafargeHolcim 2018

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Surface characterization Dynamic Friction Tester (ASTM E 1911) ➔ Microtexture at different speed

➔ Microtexture is still good after 5 mo. cycles of traffic © LafargeHolcim 2018

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3.Full scale IC construction (France)

| FOR INTERNAL USE ONLY

© LafargeHolcim 2018

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Objectives • Investigate the feasibility of the IRC system (IRC+ OC) during different stages: • from the production in mix plant with special admixture modified concrete • to the transport then to the placement with good coordination between mix plant and jobsite to ensure the “wet on wet” placement • to the placement of 2 layers at the same time with modified slip form

• This jobsite involved then: • Lafarge Vaucluse mix plants team for concrete production (C30/37 S1 and IRC)

• Agilis team for the placement • LCR team for mix design, raw materials procurement and support

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

2 layers placed at once • • • • • • • •

33°C Sunny No wind Start: 12h05 End:17h30 50m of length 2.5 m of width 3cm IRC on 15 cm of C30/37 S1

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

2 layers placed at once

Slipform Concrete for bottom layer

Finisher screed

IRC supplied by backhoe loader FOR INTERNAL USE ONLY

© LafargeHolcim 2018

Slipform

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

IRC for the top layer

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

Finition of 2 layer pavement

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

Finishing surface

Š LafargeHolcim 2018

Finition of 2 layer pavement

Š LafargeHolcim 2018

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Vibrating beam for correction

FOR INTERNAL USE ONLY

© LafargeHolcim 2018

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IRC for the top layer

Š LafargeHolcim 2018

© LafargeHolcim 2018