Effect of Recycled Aggregate Modification on the Properties of Permeable Asphalt Concrete

Bin Lei, Qianghui Xiong, Zhuo Tang (), Zhimin Yao () and Jianguo Jiang
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Bin Lei: School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
Qianghui Xiong: School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China
Zhuo Tang: School of Civil Engineering, Central South University, Changsha 410004, China
Zhimin Yao: School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China
Jianguo Jiang: School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China

Sustainability, 2022, vol. 14, issue 17, 1-21

Abstract: This study aims to evaluate the pavement performance of permeable asphalt concrete (PAC) produced with modified recycled coarse aggregate (RCA) based on six types of single modification methods and three types of double modification methods. Firstly, the water absorption, apparent density, and crushing value of the RCA before and after modification were tested. Subsequently, the performance of PAC with these types of modified RCA was investigated, including the optimum asphalt-aggregate ratio, water stability, high-temperature performance, and low-temperature crack. The test results show that the physical properties of RCA were improved to some extent owing to the modification methods adopted, except that the water absorption of RCA-C and RCA-PC increased by 33.5% and 32.6%, respectively, compared with that of RCA. This increase in the water absorption was attributed to the high water absorption of the cement mortar. As a whole, various modification methods have different effects on the road performance of asphalt mixtures, and soaking RCA with slag powder and silane coupling agent was prominent among them. Compared with the PAC with RCA, the Marshall stability, Marshall stability of immersion, residual stability, TSR, dynamic stability and low-temperature tensile strength of PAC with RCA-SLSC were increased by 31.8%, 41.0%, 7.0%, 5.8%, 280.7% and 17.2%, respectively.

Keywords: recycled coarse aggregate; permeable asphalt concrete; double modification; road performance (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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