Influence of Partial Coarse Fraction Substitution of Natural Aggregate by Recycled Concrete Aggregate in Hot Asphalt Mixtures

Debora Acosta Álvarez, Anadelys Alonso Aenlle, Antonio José Tenza-Abril and Salvador Ivorra
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Debora Acosta Álvarez: Faculty of Civil Engineering, Technological University of Havana “José Antonio Echeverría”, Havana 11500, Cuba
Anadelys Alonso Aenlle: Faculty of Civil Engineering, Technological University of Havana “José Antonio Echeverría”, Havana 11500, Cuba
Antonio José Tenza-Abril: Department of Civil Engineering, University of Alicante, 03080 Alicante, Spain
Salvador Ivorra: Department of Civil Engineering, University of Alicante, 03080 Alicante, Spain

Sustainability, 2019, vol. 12, issue 1, 1-16

Abstract: The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different recycled concrete aggregate (RCA) percentages (0%, 20%, 40%, 60% and 80% of the fraction 5–13 mm) and asphalt (4%, 4.5% and 5%). Dense asphalt mixtures were made; partially replacing the natural aggregate (NA) fraction between 5 and 13 mm. Marshall specimens were manufactured to determine the main properties of the asphalt concrete (AC) in terms of density, voids, stability and deformation. Additionally, the optimal asphalt content (OAC) was determined, and measured the water sensibility, the stiffness modulus and the permanent deformation. The results corroborate the potential for using these sources of construction and demolition waste (CDW) as a RCA in asphalt concrete and show that the hot asphalt mixtures with up to 40% substitution of natural aggregate by recycled aggregate in the fraction 5–13 mm present good behavior.

Keywords: recycled concrete aggregates (RCA); construction and demolition waste (CDW); hot asphalt mixtures (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
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