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Thursday, 17 October 2019
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Raw materials & technologies, Applications

Studying bituminous mixtures made with recycled concrete aggregates

Thursday, 27 November 2014

Recycled concrete aggregates (RCA) appear to be suitable materials to use in hot-mix asphalt (HMA) for flexible road pavements.

Test stretches of HMA with RCA exhibited good performance. Source: DuPont

Test stretches of HMA with RCA exhibited good performance. Source: DuPont

However, the poor quality of RCA results in different engineering properties of an HMA using RCA compared to mixtures composed of natural aggregates.

RCA have poor quality than natural aggregates

This paper presents a review on the properties of HMA with RCA. Varied laboratory results were obtained, likely because of the heterogeneous nature and origin of the RCA. Nevertheless, a majority of the studies report a high stripping potential of RCA mixtures. Several treatments help mitigate this problem. Additionally, select test stretches of the RCA mixture exhibited good performance.

The study is published in: Construction and Building Materials, Volume 74, 15 January 2015, Pages 151-161.

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