基于灰色关联的环氧沥青混合料疲劳性能影响因素分析

Analysis on Influence Factors of Fatigue Performance for Epoxy Asphalt Mixture Based on Grey Relation Degree Theory

采用应力控制的小梁弯曲疲劳试验方法,分析空隙率、摊铺等待时间、油石比对环氧沥青混合料疲劳性能的影响,依次给出各因素最佳取值范围,并通过灰色关联分析法计算各因素与疲劳寿命的关联度,为环氧沥青混合料设计提供参考。试验结果表明:最佳空隙率为3%,最佳摊铺时间为40 min,最佳油石比为5%,对于环氧沥青混合料疲劳性能的影响程度为:油石比>空隙率>摊铺等待时间。

Effects of porosity, paving waiting time and aggregate ratio on epoxy asphalt mixture fatigue performance were researched through the three-point flexure fatigue tests controlled by loading. The recommended value of each factor was respectively given and the correlation degree of each factor associated with the epoxy asphalt mixture fatigue life was analyzed by the grey relation degree theory, which could provide reference for the design of epoxy asphalt mixture. Results showed that： the optimum porosity was 3%, the optimum waiting time was 40 min and the optimum aggregate ratio was 5%. The influence degree on the fatigue performance of e- poxy asphalt mixture was arranged and the sequencing was aggregate ratio 〉 porosity 〉 paving waiting time.