The strength and environmental performance of asphalt mixtures with recycled concrete aggregates

被引：11
|
作者：
Nwakaire, Chidozie Maduabuchukwu [1 ,3 ]
Onn, Chiu Chuen [1 ,2 ]
Yap, Soon Poh [1 ,2 ]
Yuen, Choon Wah [1 ,2 ]
Koting, Suhana [1 ,2 ]
Mo, Kim Hung [1 ,2 ]
Othman, Faridah [1 ]
机构：
[1] Univ Malaya, Fac Engn, Dept Civil Engn, Kuala Lumpur 50603, Malaysia
[2] Univ Malaya, Fac Engn, Ctr Transportat Res, Kuala Lumpur 50603, Malaysia
[3] Nnamdi Azikiwe Univ, Fac Engn, Dept Civil Engn, PMB 5025, Awka, Nigeria
来源：
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT | 2021年 / 100卷
关键词：
Global warming potential; Tensile strength; Life cycle assessment; Recycled concrete; Aggregate; Resilient modulus; Stability; LIFE-CYCLE ASSESSMENT; HOT-MIX ASPHALT; RECLAIMED ASPHALT; PAVEMENT; CONSTRUCTION;
D O I：
10.1016/j.trd.2021.103065
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Recycling of concrete aggregates in asphalt pavement surfacing is a viable solid waste management strategy. This study evaluated the strength and environmental performance of asphalt mixtures containing different proportions of Recycled Concrete Aggregates (RCA) for road pavement surfacing. Laboratory experiments and environmental life cycle assessment were conducted for different asphalt mixtures. The mixture was evaluated based on their stability/Global Warming Potential (GWP), resilient modulus/GWP, and Indirect Tensile Strength (ITS)/GWP ratios. The mixture containing 40% coarse RCA was judged to be the most efficient based on its highest resilient modulus/GWP and ITS/GWP ratios of 108.30 MPa/kg CO2 eq and 11.75 kPa/kg CO2 eq, respectively. These values are about 9% and 4% higher than the control values for the two indicators, respectively. The study recommended 40% partial replacement of granite with RCA in Stone Mastic Asphalt for optimum strength and environmental impact.
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页数：16
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