Crack initiation and propagation in epoxy asphalt concrete in the three-point bending test

被引：30
|
作者：
Chen, Leilei [1 ]
Qian, Zhendong [1 ]
Lu, Qing [2 ]
机构：
[1] Southeast Univ, Intelligent Transport Syst Res Ctr, Nanjing, Jiangsu, Peoples R China
[2] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA
来源：
ROAD MATERIALS AND PAVEMENT DESIGN | 2014年 / 15卷 / 03期
基金：
中国国家自然科学基金;
关键词：
epoxy asphalt concrete; crack initiation and propagation; three-point bending test; digital image correlation; extended finite element method; MIXTURES; REPRESENTATION; TOMOGRAPHY; SIMULATION;
D O I：
10.1080/14680629.2014.908132
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
To determine the micro-cracking mechanism in epoxy asphalt concrete (EAC) so as to guide the crack rehabilitation strategy, the process of cracking initiation and propagation in the EAC were measured using a digital image correlation approach, and was simulated based on an extended finite element method. Firstly, the three-point bending test was conducted during which cracking initiation and propagation in EAC were measured and fracture parameters of mastic cement and aggregate were determined. Then numerical simulation was performed based on an EAC microstructure model. Simulation results of cracking match well with the micro-crack initiation and propagation process in EAC measured in the laboratory at a low temperature. The specimen fracture process and the cracking propagating route are discussed based on the analysis results.
引用
收藏
页码：507 / 520
页数：14
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