Abstract
The aim of this study is solving the problem of acceptance of the aggregate internal structure types of asphalt pavements after construction. The core sample from pavement was taken as the research object. A method for evaluating the aggregate internal structure types was put forward. The steps of the testing method are as follows: measuring the height of the core sample from pavement (Hmix), getting coarse aggregate through burning the core sample, preparing the contrast sample by dry rodded method, and measuring the height of the sample (HDRC). When Hmix is less than or equal to HDRC, the aggregate structure in asphalt mixture is the skeleton structure; if not, it is the suspension structure. The testing specimens were obtained from three sections of an express way, and the AC-20 in middle surface and SMA-16 in upper surface were adopted in this test. We researched the effect of aggregate internal structure types on high temperature deformation resistance. The results show that the evaluation of aggregate internal structure types, namely Hmix/HDRC, is closely related to the high temperature deformation of mixture. The result of this study offers a new method to check the internal aggregate structure types of asphalt pavements after construction.
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