Utilisation of recycled concrete aggregates for sustainable porous asphalt pavements

Nwakaire, Chidozie Maduabuchukwu and Yap, Soon Poh and Onn, Chiu Chuen and Yuen, Choon Wah and Moosavi, Seyed Mohammad Hossein (2022) Utilisation of recycled concrete aggregates for sustainable porous asphalt pavements. Baltic Journal of Road and Bridge Engineering, 17 (1). pp. 117-142. ISSN 1822-427X, DOI https://doi.org/10.7250/bjrbe.2022-17.554.

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The use of recycled concrete aggregates (RCA) for porous asphalts is a viable attempt towards waste management and sustainable conservation of natural resources. Installation of a porous asphalt wearing course is justified in highway pavements because it offers higher skid resistance, glare reduction, lesser traffic noise, reduction of hydroplaning, and mitigation of urban heat island phenomenon. The performance of porous asphalt mixtures containing 0%, 20%, 40%, 60%, 80% and 100% of coarse RCA as replacement for granite was studied and reported in this paper. The mixture containing 0% RCA was used as the control. The skid properties, permeability, water susceptibility and mechanical behaviour of the mixtures under various loading conditions were investigated. Blending granite and RCA in the porous asphalt mixture gave better Indirect Tensile Strength (ITS), rutting resistance, and impact strength indicators. The mixture with 60% RCA achieved desirable results in all tests. It exhibited the best performance based on its ITS and impact strength of 431 kPa and 380 J, respectively. These values were higher than the control by 3% and 30%, respectively. Utilisation of RCA in porous asphalt pavements is recommended based on the results of this study.

Item Type: Article
Funders: Universiti Malaya [Grant No: GPF008A-2019], Tertiary Education Trust Fund (TETFund), Nigeria
Uncontrolled Keywords: Circular economy; Impact strength; Permeability; Rutting resistance; Recycling; Sustainability
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering > Department of Civil Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 28 Aug 2023 08:07
Last Modified: 28 Aug 2023 08:07
URI: http://eprints.um.edu.my/id/eprint/43096

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