Mechanical properties of warm-mix asphalt concrete containing different additives and recycled asphalt as constituents applied in real production conditions

Martinho, Fernando J. B.; Picado-Santos, Luís; Capitão, Silvino

doi:10.1016/j.conbuildmat.2016.11.051

Cited by 30 publications

(31 citation statements)

References 12 publications

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“…The incorporation of recycled aggregates in asphalt mixtures or in other type of layers for pavements, or even in other type of works, has also been recently described in several articles and technical documents [2,7,[30][31][32]48,56].…”

Section: Recycled Aggregates (With or Without Binders)mentioning

confidence: 99%

“…The authors can declare, based on their own previous experience, that up to 40% of RAP (by total weight) can be incorporated in the production process in a conventional batch plant just by premixing RAP and new aggregates 20 s before adding the new binder [86,87]. Adding RAP in a plant allow a better control of the process, increasing the level of confidence on expected properties of the final blend and allowing a mechanical performance comparable to that of similar mixtures produced without RAP [2,8,59].…”

Section: Asphalt Mixtures With Rapmentioning

confidence: 99%

“…In the case of WMA with up to 35% of RAP, the use of additives to lower the handling temperature is an additional source of variability of mechanical performance results. Nevertheless, the studies carried out [2,89] also reveal that mechanical performance of WMA with RAP is suitable, enlarging the possibilities of using RAP in asphalt mixtures.…”

Section: Asphalt Mixtures With Rapmentioning

confidence: 99%

“…ct on mechanical performance of using RCA as partial substitute of the aggregates [7,90] Comparing with conventional HMA without RAP. 2 Comparing with a similar WMA blend without RAP. 3 Depends on the applied additives.…”

Section: Asphalt Mixtures With Rcamentioning

confidence: 99%

“…In Portugal, as in many other countries, the most common pavements are flexible, with several layers formed by asphalt mixtures. These layers include different blends of aggregates (roughly 95% of weight), obtained by crushing rock extracted in quarries, and bitumen (about 5% of weight), produced in refineries as a by-product of distillation of crude oil, and, sometimes, also additives to change some specific features of the asphalt mixtures [1][2][3]. Because this refining process is related to the energy sector, the footprint issues associated to bitumen have had generally more attention than the concerns related with the aggregates and, therefore, several solutions have been proposed to reduce the environmental impact of its use [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Feasibility Assessment of the Use of Recycled Aggregates for Asphalt Mixtures

2018

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The use of recycled aggregates, manufactured from several by-products, to replace virgin aggregates in the production of pavement asphalt mixtures needs to be encouraged. Nevertheless, there are some concerns and uncertainties about the actual environmental, economic and mechanical performance resulting from the incorporation of recycled aggregates in asphalt mixtures. Therefore, this paper has the goal of discussing important features to help decision makers to select recycled aggregates as raw materials for asphalt mixtures. Based on the literature review carried out and the own previous experience of the authors, the article's main findings reveal that incorporating some of the most common recycled aggregates into asphalt mixtures is feasible, even in a life-cycle analysis perspective. Although some specific technical operations are sometimes necessary when using recycled aggregates in asphalt mixtures, some benefits in terms of environmental impacts, energy use and costs are likely to be achieved, as well as in what concerns the mechanical performance of the asphalt mixtures.

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