In order to investigate the size effect of the splitting tensile strength of asphalt mixture,the Brazilian splitting numerical tests of four kinds of asphalt mixture with different sizes(AC-13,AC-16,AC-20,AC-25)were carried out by using particle discrete element numerical simulation technique.The size scaling coefficients of each group of gradation models are 0.6,0.8,1.0,1.2,1.4 respectively.The relationship between the size scaling coefficients and the size effect of tensile strength of asphalt mixture is established,and the critical size and critical strength of asphalt mixture under four gradations are obtained.The test results show that the tensile strength of the four graded asphalt mixtures has obvious size effect,and the larger the grading,the less obvious the size effect.The correlation coefficient of tensile strength of the graded AC-25 sample is about 94.37％of the graded AC-13 sample.
关键词
离散元法/沥青混合料/劈裂强度/尺寸效应
Key words
discrete element method/asphalt mixture/splitting strength/size effect
维普
万方数据