关键词: 道路工程, AC型沥青混合料, 试验设计, 冻融劈裂强度, 影响因素, 相关性

Abstract: A ccording to orthogonal experimental design, factors influencing freezing-thawing splitting strength of AC- 13 and AC－20 modified asphalt mixture as well as their relativiy were studied. Through the test, it was demonstrated that the gradation composition played a desicive role in determining the AC－13 asphalt mixture freezing-thawing splitting strength, while it exerted little influence on the OAC; VV and sand equivalent value were crucial factors forAC- 20 asphalt mixture freezing-thawing splitting strength; there was a good linear relationship between freezing-thawing splitting strength and Marshall performance index. Suggestions for improving construction quality were made.

Key words: road engineering, AC asphalt mixture, test design, freezing-thawing splitting strength, influencing factors;correlation