冷补沥青与集料黏附性定量评价方法研究

Quantitative Evaluation Method of Adhesion Property of Cold PatchAsphalt and Aggregate

针对冷补沥青混合料缺少黏附性定量分析,且水煮法定性分析不足的问题,笔者利用冷补料冻融循环的方法,以冻融前后的沥青裹附率比值为评价指标,对冷补料的黏附性进行了定量评价研究。研究结果表明:笔者提出的黏附性评价指标在很大程度上与规范法黏附性等级评定标准有很好的符合性,为冷补液的选取提供了依据;笔者采用的J、K、L三种冷补料,能够提高冷补液与集料之间的黏附性能,且黏附性能依次为:J类>K类>L类;笔者采用裹附率比值P作为定量评价指标,大大增加了试验结果的客观性,为冷补液的选取提供了依据。

Aiming at the problem of the lack of quantitative analysis of the adhesiveness of cold patched asphalt mixture,and the insufficient qualitative analysis of boiling method,the method of freezing and thawing cycle of cold patch asphalt mixture was used to quantitatively evaluate the adhesion of cold patch asphalt mixture,which took the ratio of asphalt entrapment before and after freezing and thawing as the evaluation index.The research results show that the proposed adhesion evaluation index is in good agreement with the evaluation standard of adhesion grade of standard method to a great extent,which provides a basis for the selection of cold patch fluid.The three types of cold patch asphalt mixture used in the test,that is J,K and L,can improve the adhesion performance between the cold patch fluid and the aggregate,and the adhesion performance is in the order of type J>type K>type L.The entrapment ratio P used as a quantitative evaluation index greatly increases the objectivity of the test results and provides a basis for the selection of cold patch fluid.