Micro-cracking Degree Control of Cement Stabilized Macadam Based on CT Technology
To investigate the influence of the void characteristics of cement stabilized macadam(CSM)on the degree of micro-cracking,the void characteristic parameters of CSM specimens after micro-cracking were extracted with the help of CT nondestructive testing technology.Then,the gray entropy correlation was used to explore the influence of the void parameters of CSM on the degree of micro-cracking.Finally,a gray relationship model between the number of voids and the degree of micro-cracking was established.The results showed that the void ratio of the surface and the degree of micro-cracking both increased then decreased with the extension of vibration time.After micro-cracking,the number of voids in the CSM specimens was higher than the nonmicro-cracking specimens,and the micro-cracking effect had the greatest influence on the voids in the area range of 0-0.1 mm2.With the extened vibration time,the percentage of voids in the range of 0-0.2 increased gradually,and the fractal dimension of the voids was larger than the nonmicro-cracking.There is the highest correlation between the degree of micro-cracking and the number of voids.The established GM(1,2)prediction model of the degree of micro-cracking can provide theoretical reference for the research and application of micro-cracking technology for CSM at the fine level.
Cement stabilized macadamCT imageMicro-crackingVoid parametersGrey prediction model
国家科技期刊平台
NSTL
万方数据
维普
