再生沥青混合料路用性能影响因素灰关联分析

Study on influencing factors of pavement performance of recycled asphalt mixture based on grey relational degree

为了研究再生沥青混合料各项设计指标对路用性能影响程度的大小,首先采集各项指标数据,通过试验检测不同指标因素下再生沥青混合料各项路用性能,然后基于灰关联度分析方法建立指标因素与路用性能之间的关系,最后计算各因素对路用性能的影响程度并进行排序分析,为再生混合料设计与应用提供参考。灰关联度分析结果表明:稳定度、沥青饱和度和油石比是影响再生沥青混合料高温性能的重要因素;空隙率是影响再生沥青混合料低温、水稳性能的首要因素;旧料掺配率对再生沥青混合料各项路用性能的影响均不显著。

In order to study the degree of influence of various design indicators of recycled asphalt mixture on road performance,various indicator data was collected to test various road performance of recycled asphalt mixture under different indicator factors.The relationship between indicator factors and road performance based on gray cor⁃relation analysis method was thus established.Finally the degree of influence of various factors on road performance was calculated,analyzed and sorted to provide reference for the design and application of recycled mixture.The results of Grey Relational Analysis show that the Marshall stability,asphalt saturation and bitumie-aggregate ratio are important factors affecting the high-temperature performance of recycled asphalt mixture;Air void is the primary factor affecting the low temperature and water stability of recycled asphalt mixture;The influence of mixture ratio of old materials on the road performance of recycled asphalt mixture is not notable.