对骨架密实结构判断标准的改进研究

针对目前对混合料的骨架密实结构判断准则,仅SMA给出了一个定性的不等式标准(VCADRC>VCAmix)的现状,根据粒子干涉及贝雷法球形模型假设理论提出了骨架密实度、骨架撑开度两个新的评价沥青混合料骨架密实结构的参数,然后通过室内试验对两个参数与沥青混合料高温稳定性之间的关系进行了研究。研究表明:沥青混合料的高温稳定性与骨架密实度呈抛线物关系,而随着骨架撑开度的增加迅速降低。最后,将研究成果应用于混合料的骨架密实结构判断中,从而改进了原有的单一判断标准。

Study on Improvement of Judgment Criterion for Skeleton and Dense Texture

In view of present judgment criterion for mixture's skeleton and dense construction which only given a qualitative inequality standard(VCADRC>VCAmix)for SMA,skeleton dense degree and skeleton separating degree were proposed based on the granule interference theory and the Bailey's sphere model supposition theory.By the indoor experiment research,the relationships between the abovementioned two parameters and the mixture's high temperature stability were obtained.The result shows that there is a parabola relation between mixture's high temperature stability and skeleton dense degree and the high temperature stability decreases rapidly with the skeleton separating degree increasing.The research result was applied in the improvement of the judgment criterion of the mixture's skeleton and dense construction.