Laboratory evaluation of warm mix asphalt incorporating high RAP proportion by using evotherm and sylvaroad additives

Lu, Dai Xuan; Saleh, Mofreh

doi:10.1016/j.conbuildmat.2016.03.200

Cited by 63 publications

(10 citation statements)

References 7 publications

(1 reference statement)

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“…Different WMA technologies use additives or foamed bitumen to decrease mixing and compaction temperatures of asphalt. Experimental results showed that an Evotherm ® WMA incorporating 50% and 75% RAP displayed better performance in terms of ITS, dynamic modulus and rutting compared to a control mix and several WMA samples incorporating 25% RAP [22]. Furthermore, Martinho et al [23] found that WMA samples produced with different WMA additives including Sasobit ® , Rediset ® and Viatop ® , each incorporating 35% RAP, showed comparable fatigue performance to traditional hot mixed asphalt without RAP.…”

Section: Recycled Asphalt Pavementmentioning

confidence: 99%

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

Jamshidi

White

2019

Applied Sciences

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Paved surfaces must reliably bear heavy loads, often under challenging environmental and geotechnical conditions. These requirements are addressed through the use of high-quality, newly produced materials in pavement design. However, in remote locations, newly produced materials are often expensive or unavailable, making waste or alternative materials more attractive. Waste materials can be used in their natural condition but are more commonly stabilised or otherwise improved to meet performance targets. However, this practice can incorporate unwarranted risk into pavement design solutions. The decision to use waste materials in a pavement is a balance between technical risk, maintenance liability, available materials, environmental emissions and capital cost. This study reviews the use of waste materials in pavement design and construction. Reclaimed asphalt pavement (RAP) materials and processed waste plastic for pavement construction are considered. Additionally, blast furnace slag (BFS) and waste glass in pavement construction are evaluated. This review focuses on the effects of alternative materials on the properties of asphalt pavement. The results indicate that RAP is acceptable as an alternative material, while BFS, waste plastic and waste glass can be used under specific conditions. Also, the current and future challenges for the use of waste materials in the pavement industry are discussed.

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Section: Recycled Asphalt Pavementmentioning

confidence: 99%

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

Jamshidi

White

2019

Applied Sciences

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“…A similar trend was reported by Gonzalez et al [39] and Silva et al [42] when they evaluated Cecabase RT for their research works. Dai Xuan and Saleh [45] observed similar viscosity values when using 0.5% Evotherm 3G in a laboratory study. Both additives showed a maximum reduction of (0.3 Pa.s) in viscosity.…”

Section: Binder Characterisationmentioning

confidence: 62%

Laboratory Investigation of Coal Bottom Ash Modified Warm Mix Asphalt

et al. 2021

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Bottom Ash (BA), a coal combustion by-product, found to be a potential material when used to produce asphalt mixture. However, some of its characteristics make it a questionable material for the surface course. Therefore, this study aims to evaluate the compatibility of BA in Warm Mix Asphalt (WMA) technology through the basic mechanical properties of the asphalt mixtures for binder course layer (AC 28). Two WMA chemical additives, Cecabase RT and Evotherm 3G, were used at the concentrations of 0.3, 0.4 and 0.5% from the binder's weight. The binder properties were assessed through penetration, softening point and viscosity tests. The Marshall mix design was used to determine the optimum binder content (OBC). The additive dosage and production temperature for WMA were determined through Marshall stability, flow, air voids and specific gravity. The results show that the additives did not significantly affect the binder properties, although, at 0.4% Evotherm 3G, a drop of 17.5% in penetration was observed. Cecabase RT produced WMA with promising results but did not enhance the workability of WMA containing bottom ash (BAWMA). By lowering the production temperature of 25 °C, WMA and BAWMA at 0.4 %, Evotherm 3G demonstrated comparable workability to the conventional Hot Mix Asphalt (HMA). The data achieved through this study would be a guiding approach towards the application of BA in WMA technology for sustainable pavements.

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“…Refs. [50,51] showed comparable performance results that were comparable to HMA for WMA-RAP using different additives, except for moisture susceptibility [50].…”

Section: Recommendationsmentioning

confidence: 81%

Potential Carbon Footprint Reduction for Reclaimed Asphalt Pavement Innovations: LCA Methodology, Best Available Technology, and Near-Future Reduction Potential

et al. 2021

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The carbon footprints of asphalt mixtures with increasing reclaimed asphalt pavement (RAP) content were estimated using a life-cycle assessment methodology. Three asphalt mixtures with different applications and technical requirements, namely porous asphalt (PA), stone mastic asphalt (SMA), and asphalt concrete (AC), were included. The technology leaps needed to achieve asphalt mixtures containing up to 93% RAP were modelled. Mixtures containing up to 57% RAP were hot-mix asphalts (175 °C), while mixtures containing more RAP were produced at 135 °C and 105 °C. The energy requirements and their respective carbon footprints were calculated based on the heat capacity of the aggregates, RAP, and other bituminous materials. Furthermore, the effects of changing the country’s electricity mix were also evaluated. A potential carbon footprint reduction of between 55% and 64% was found for one tonne of asphalt containing 93% RAP and produced at 105 °C compared to the 0% RAP mixture produced at 175 °C. Considering the uncertainty of this technology at its early stage of development, the reduction could be as low as 45% or as high as 79%. Changing the electricity mix to one that is likely to be implemented until 2030 in the Netherlands further reduces the footprint by 10%.

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Laboratory evaluation of warm mix asphalt incorporating high RAP proportion by using evotherm and sylvaroad additives

Abstract: 8Warm mix asphalt (WMA) has gradually become more popular in the roading industry.

Cited by 63 publications

References 7 publications

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

Evaluation of Performance and Challenges of Use of Waste Materials in Pavement Construction: A Critical Review

Laboratory Investigation of Coal Bottom Ash Modified Warm Mix Asphalt

Potential Carbon Footprint Reduction for Reclaimed Asphalt Pavement Innovations: LCA Methodology, Best Available Technology, and Near-Future Reduction Potential

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