Improving the Sustainability of Semi-Dense Asphalt Pavements by Replacement of Recycled Concrete Aggregate Fractions

Mikhailenko, Peter; Kakar, Muhammad Rafiq Khan; Piao, Zhengyin; Bueno, Moises; Poulikakos, Lily (2020). Improving the Sustainability of Semi-Dense Asphalt Pavements by Replacement of Recycled Concrete Aggregate Fractions In: Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements—Mairepav9. Lecture Notes in Civil Engineering: Vol. 76 (pp. 343-351). Cham: Springer 10.1007/978-3-030-48679-2_33

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Waste concrete is one of the most highly produced types of waste in the urban environment and finding a means for its re-use is crucial to making infrastructure sustainable. Semi-Dense Asphalt (SDA) is a type of asphalt mixture, which is commonly used in Switzerland to reduce pavement noise. This study examined the use of various fractions of Recycled Concrete Aggregates (RCA) into SDA mixtures. The virgin aggregates were replaced by RCA in selected fractions of 2/4 and 0.125/2 at 100% and 50%, with only one fraction being replaced for any single mixture. The mixtures were evaluated by volumetrics, indirect tensile strength and water sensitivity (EN 12697-12) in order to assess the effects of each RCA fraction. The results showed that RCA coarse aggregates absorb high amounts of binder, which is not the case for the RCA sand. The ITS results showed increase peak load for the RCA replacement samples but also increased brittleness. The ITSR% was similar to the control for lower fraction of RCA replacement samples, but significantly lower with higher replacement.

Item Type:	Book Section (Book Chapter)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Urban Development and Infrastructure > Transport Infrastructure
Name:	Mikhailenko, Peter; Kakar, Muhammad Rafiq Khan; Piao, Zhengyin; Bueno, Moises and Poulikakos, Lily
Subjects:	T Technology > TE Highway engineering. Roads and pavements
ISBN:	978-3-030-48678-5
Series:	Lecture Notes in Civil Engineering
Publisher:	Springer
Language:	English
Submitter:	Muhammad Rafiq Khan Kakar
Date Deposited:	22 Mar 2022 10:35
Last Modified:	08 Apr 2022 08:37
Publisher DOI:	10.1007/978-3-030-48679-2_33
Uncontrolled Keywords:	Indirect tensile strength · Water sensitivity · Recycled Concrete Aggregates (RCA) · Semi-Dense Asphalt (SDA)
ARBOR DOI:	10.24451/arbor.16553
URI:	https://arbor.bfh.ch/id/eprint/16553