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Effects of recycled concrete aggregates on properties of asphalt concrete

Author

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  • Paranavithana, Sumeda
  • Mohajerani, Abbas

Abstract

Recycled concrete aggregates (RCA) are produced by crushing demolished concrete elements. RCA differ from fresh aggregates due to the cement paste attached to the surface of the original natural aggregates after the process of recycling. This highly porous cement paste and other contaminations contribute to the lower particle density and higher porosity, variation in the quality of the RCA and the higher water absorption. This paper presents some of the results of an investigation on the possible application of RCA in asphalt concrete. It was found that all the volumetric properties (except the percentage of air voids), resilient modulus and creep values of asphalt specimens containing RCA as coarse aggregates were relatively lower compared with the values found for similar specimens made with only fresh aggregates. Some of these measured properties were within the acceptable recommended limits, for the RCA sample used in this study.

Suggested Citation

  • Paranavithana, Sumeda & Mohajerani, Abbas, 2006. "Effects of recycled concrete aggregates on properties of asphalt concrete," Resources, Conservation & Recycling, Elsevier, vol. 48(1), pages 1-12.
    • Handle: RePEc:eee:recore:v:48:y:2006:i:1:p:1-12
    DOI: 10.1016/j.resconrec.2005.12.009
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    Citations

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    Cited by:

    1. Huang, Tao & Shi, Feng & Tanikawa, Hiroki & Fei, Jinling & Han, Ji, 2013. "Materials demand and environmental impact of buildings construction and demolition in China based on dynamic material flow analysis," Resources, Conservation & Recycling, Elsevier, vol. 72(C), pages 91-101.
    2. Tam, Vivian W.Y. & Le, Khoa N., 2007. "Aggregate testing using 2nd-, 7th- and 10th-order interpolation polynomials," Resources, Conservation & Recycling, Elsevier, vol. 52(1), pages 39-57.
    3. Carlos D. A. Loureiro & Caroline F. N. Moura & Mafalda Rodrigues & Fernando C. G. Martinho & Hugo M. R. D. Silva & Joel R. M. Oliveira, 2022. "Steel Slag and Recycled Concrete Aggregates: Replacing Quarries to Supply Sustainable Materials for the Asphalt Paving Industry," Sustainability, MDPI, vol. 14(9), pages 1-31, April.
    4. Zhao, W. & Leeftink, R.B. & Rotter, V.S., 2010. "Evaluation of the economic feasibility for the recycling of construction and demolition waste in China—The case of Chongqing," Resources, Conservation & Recycling, Elsevier, vol. 54(6), pages 377-389.

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