灰色关联分析法在沥青低温性能指标中的应用

Theory of Grey Relation Degree Applied in Performance Index of Asphalt Binders at Low Temperature

应用灰色关联分析法分析并计算了目前国内常用的几种沥青低温指标与SHRP沥青低温指标小梁弯曲蠕变试验测定的弯曲劲度模量S,蠕变速率m值的关联度.结果表明,延度和SHRP沥青低温指标的关联程度比较差.因此对延度和SHRP沥青低温性能指标存在的差异仍需要进一步研究和分析,为对沥青低温性能指标的改进及对沥青低温性能更好的判断提供依据.

This paper adopts the theory of grey relation degree to evaluate the low-temperature performance index of asphalt binders. The results indicate that it has worse relation degree between the ductility at 10 ℃ and the bend creep stiffness of asphalt binders, as well as the creep velocity. So further research and analysis should be done to resolve the discrepancy and improve the lowtemperature performance evaluation index of asphalt binders, and provide the basis for better judgement in the low-temperature performance of asphalt binders.