The influence of RAP rate on the road performance of hot recycled asphalt mixture
The AC-16 hot recycled asphalt mixture is prepared with three RAP rates of 10%,30%and 50%.The road per-formance indicators such as stability,dynamic stability,maximum bending tensile strain,freeze-thaw splitting strength ratio,Hamburg rut peeling point and other high temperature,low temperature,water stability,anti-aging and other road performance indicators are tested through tests,and compared with the road performance of the new mixture with the same grading,analyze the law of changes in the road performance of hot recycled asphalt mixtures caused by different RAP rates.The experimental results show that as the RAP rates increases,the high-temperature performance of hot recycled asphalt mixture gradually enhances,the low-temperature per-formance gradually decreases,and the water stability performance first enhances and then decreases.On the basis of ensuring good road performance,while considering economic and environmental benefits,it is recommended that the RAP rate of hot recycled as-phalt mixture is around 30%.
road engineeringasphalt mixturehot regenerationRAP rateroad performance test
万方数据
维普
