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Sustainability 2018, 10(6), 1737; https://doi.org/10.3390/su10061737

Feasibility Assessment of the Use of Recycled Aggregates for Asphalt Mixtures

1
Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
2
CERIS—Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
3
Instituto Superior de Engenharia de Coimbra, Instituto Politécnico de Coimbra, Rua Pedro Nunes, 3030-199 Coimbra, Portugal
*
Author to whom correspondence should be addressed.
Received: 2 May 2018 / Revised: 23 May 2018 / Accepted: 23 May 2018 / Published: 25 May 2018
(This article belongs to the Collection Sustainable Built Environment)
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Abstract

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. View Full-Text
Keywords: asphalt mixture; electric arc furnace slag; reclaimed asphalt pavement; recycled concrete aggregate; circular economy asphalt mixture; electric arc furnace slag; reclaimed asphalt pavement; recycled concrete aggregate; circular economy
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Martinho, F.C.G.; Picado-Santos, L.G.; Capitão, S.D. Feasibility Assessment of the Use of Recycled Aggregates for Asphalt Mixtures. Sustainability 2018, 10, 1737.

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