冷补沥青混合料性能评价及技术要求

Performance Evaluation and Technical Requirements of Cold Patch Asphalt Mixture

摘要:

针对冷补沥青混合料技术应用中存在的施工和易性和路用耐久性的矛盾,参考国内外相关资料和研究成果,制定了粘附性试验、贯入试验、粘聚性试验、修正马歇尔试验4个评价方法.变化隔离剂的掺量,选择3种添加剂和2种矿料级配,配制了若干种冷补料并进行了试验.分析试验结果,指出冷补料性能评价应兼顾施工性能和马歇尔强度,重视粘聚性能和水稳定性,据此提出了冷补沥青混合料的评价指标和技术要求.

Abstract:

This paper presents four test methods,with emphasis on the contradiction of workability with durability,for evaluate performance of cold patch asphalt mixture based on related research at home and abroad.The methods are adhesion test,penetration test,cohesion test and modified Marshall test.Several kinds of cold mix with three additives and two material gradations are prepared by varying contents of separant,and then some tests are made.The test results show that both workability performance and Marshall strength should be taken into consideration,and attentions should be paid to the cohesion performance and moisture susceptibility in the evaluations of cold mix performance.At last,recommendations for evaluation indices and technical requirements of cold patch asphalt mixture are given.