基于RAP料级配变异性的再生沥青混合料路用性能评价

Evaluation of Road Performance of Recycled Asphalt Mixture Based on Variability of RAP Material Gradation

以细度模数的变化为评价RAP料级配变异性的指标,通过车辙试验、低温SCB断裂试验作为评价再生沥青混合料多种性能的试验方法,评估多来源RAP料级配变异性对再生沥青混合料路用性能的影响。结果表明再生沥青混合料高温性能的动稳定度随着细度模数和SCB断裂能波动其变异系数达到了20%以上,说明级配变异性对再生沥青混合料路用性能有着很大影响。

The change of fineness modulus was used as an index to evaluate the variability of RAP material gradation,and the rutting test and low temperature SCB fracture test were used as test methods to evaluate the effect of multi-source RAP material gradation variability on the pavement performance of recycled asphalt mixtures.The results show that the dynamic stability of the high temperature performance of recycled asphalt mixture has a variation coefficient of more than 20%with the fineness modulus and SCB fracture energy fluctuation.This show that the gradation variability has a great influence on the road performance of the recycled asphalt mixture.