文献类型：期刊文献

英文题名：Evaluation of low-temperature fracture properties of asphalt mixtures using SCB fracture test and finite element method (FEM)

作者：Fan, Shiping Zhang, Wenli Gan, Xinli

通信作者：Fan, SP[1]

机构：[1]Guizhou Inst Technol, Sch Transportat Engn, Guiyang 550025, Guizhou, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Transportat Engn, Guiyang 550025, Guizhou, Peoples R China.|贵州理工学院;

年份：2025

卷号：10

期号：7

外文期刊名：INNOVATIVE INFRASTRUCTURE SOLUTIONS

收录：Scopus(收录号：2-s2.0-105008502416);WOS:【ESCI(收录号:WOS:001510804800001)】；

基金：This work was supported by the Academic Emergence Training and Innovative Exploration Program of Guizhou Institute of Technology (Program No. 2024XSXM003); the National Natural Science Foundation of China (Program No. 52468061); Guizhou Provincial Key Technology R&D Program (Program No. [2023] General 299 - 088); Guizhou Provincial Basic Research Program (Program No.[2024] Youth 416).

语种：英文

外文关键词：Asphalt concrete; SCB fracture test; Cracking resistance; Stress intensity factor; J-integral

摘要：Asphalt mixture cracking is one of the major factors affecting the performance of asphalt pavement, which will significantly reduce the pavement service life. In this study, the cracking resistance of asphalt mixtures was evaluated by combining the lab semi-circular bending (SCB) fracture test and the finite element method (FEM) through the indexes of stress intensity factor, fracture energy, and J-integral. The effects of asphalt binder, gradation and notch length on the cracking resistance of asphalt mixtures were analyzed. The results show that the maximum tensile stress appeared in the bottom center of the SCB specimen and gradually decreased along the diameter and thickness directions, and the compressive stress mainly appeared in the semicircular specimen on the outer circumference, forming a curved region along the pivot point. An expression for the stress intensity factor at the crack tip of the specimen with notch lengths was established. In addition, it is beneficial to select aggregates with large size and improve the asphalt binder properties to improve the cracking resistance of asphalt mixtures. Besides, the tensile stress, KIC and fracture energy of asphalt mixtures decreased almost linearly with the increase of notch length. The research results provide a reference for improving the cracking resistance of asphalt mixtures.