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An Experimental Study of Granular Material Using Recycled Concrete Waste for Pavement Roadbed Construction

Al-Mosawe, Hasan; Albayati, Amjad; Wang, Yu; Mashaan, Nuha S.

Authors

Hasan Al-Mosawe

Amjad Albayati

Profile image of Yu Wang

Dr Yu Wang Y.Wang@salford.ac.uk
Associate Professor/Reader

Nuha S. Mashaan



Abstract

Rapid worldwide urbanization and drastic population growth have increased the demand for new road construction, which will cause a substantial amount of natural resources such as aggregates to be consumed. The use of recycled concrete aggregate could be one of the possible ways to offset the aggregate shortage problem and reduce environmental pollution. This paper reports an experimental study of unbound granular material using recycled concrete aggregate for pavement subbase construction. Five percentages of recycled concrete aggregate obtained from two different sources with an originally designed compressive strength of 20–30 MPa as well as 31–40 MPa at three particle size levels, i.e., coarse, fine, and extra fine, were tested for their properties, i.e., the optimum moisture content density, Californian bearing ratio, and resilient modulus. A characterization of the resilient modulus of the mixes under complex stress conditions was performed. The characterized modulus model was used in the nonlinear analysis of the pavement structure under traffic loading using KENALYER software. Consequently, the two critical responses, i.e., the tensile strain at the bottom of the asphalt layer and the vertical compressive strain at the top of the subgrade, were computed and compared for the pavement structures with varying types and percentages of recycled concrete aggregate used in the subbase layer.

Citation

Al-Mosawe, H., Albayati, A., Wang, Y., & Mashaan, N. S. (2022). An Experimental Study of Granular Material Using Recycled Concrete Waste for Pavement Roadbed Construction. Buildings, 12(11), 1926. https://doi.org/10.3390/buildings12111926

Journal Article Type Article
Acceptance Date Nov 7, 2022
Online Publication Date Nov 8, 2022
Publication Date Nov 8, 2022
Deposit Date Nov 14, 2022
Publicly Available Date Nov 14, 2022
Journal Buildings
Publisher MDPI
Volume 12
Issue 11
Pages 1926
DOI https://doi.org/10.3390/buildings12111926
Publisher URL https://doi.org/10.3390/buildings12111926

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