Performance evaluation and technical requirements of cold patch asphalt mixture

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.