水对沥青混合料影响的CT图像熵值分析

为了研究沥青路面水损害中水对沥青混合料微观结构的影响,采用不同的水处理条件对沥青混合料试件进行预先处理,然后进行劈裂试验,获取试件初始和劈裂后内部结构的CT图像,通过图像熵的计算分析水对沥青混合料微观结构的影响。结果是经受冻融作用试件的熵增更显著,同时近似t检验结果表明,两个试件的试验和计算结果具有统计代表性。

CT Image Entropy Analysis for Influences of Moisture on Asphalt Mixtures

The study aims to identify how the moisture affects the micro structure of asphalt mixtures.Test simulation method is used in this study.Two specimens of asphalt mixtures with the same aggregate grades are chosen here and two kinds of moisture condition are designed to treat the specimens before the asphalt mixtures' fracture test.The internal structures of the asphalt specimens before any treatment and after fracture tests are acquired through the use of the Computer Tomography scanning technology.And the influences which brought to the asphalt mixture by the moisture are analyzed by the calculation of the entropies of the specimens.The results show that the entropy increase of the frozen-thaw specimen is more significant.Meanwhile,the significance of the calculation results is examined by introducing statistics methods and the study shows that the test and calculation results of the two specimens have statistics representative meaning.