ZHANG Jianchao,PENG Shaocheng,et al.Visualization and quantitative fracture analysis of rubber mortar under in-situ loading[J].Journal of Shenzhen University Science and Engineering,2021,38(2):144-150.[doi:10.3724/SP.J.1249.2021.02144]





Visualization and quantitative fracture analysis of rubber mortar under in-situ loading
1)中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨 150080
ZHANG Jianchao1 2 PENG Shaocheng2 KUANG Chuan2 WENG Jianwu2 DONG Biqin2 HONG Shuxian2 and XING Feng1 2
1) Institute of Engineering Mechanics, Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin 150080, Heilongjiang Province, P.R.China
2) College of Civil and Transportation Engineering, Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China
building materials rubber mortar 3D-visualization X-ray micro-computed tomography crack propagation image processing
In order to improve the ductilityof cement-based materials, rubber is often added to cement-based materials. But the rubber-cement interface will introduce more initial defects, and make the three dimensional images obtained by the X-ray micro-computed tomography (X-ray μCT) technology more complex, and finally,which leads to the full threshold method no longer applicable to analysis of the internal three-dimensional cracks.This paper presents an improved image processing method, which can accurately identify mesoscopic cracks and achieve the separation of pores and cracks. In order to verify this method, X-ray computed tomography (XCT) in-situ observation technology is used to obtain the crack formation of rubber mortar with different replacement ratios. Pores and cracks are well identified and separated by this method. Quantitative analysis shows that the new method has higher accuracy and better identification of mesoscopic cracks than traditional methods. Due to the incorporation of rubber, there are more initial cracks in the rubber mortar, but the rubber will improve the overall absorption of the input energy of the sample, resulting in a decrease in the number of large cracks and the total crack volume when the specimen is failure.Compared with the sample without rubber content, the total crack volume of the sample with 5% and 10% mass fraction of rubber decreases by 30% and 45%, respectively.


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Foundation:National Natural Science Foundation of China (51878411, 51727813); National Science Foundation for Outstanding Youth of China (51925805)
Corresponding author:Professor XING Feng.E-mail: xingf@szu.edu.cn
Citation:ZHANG Jianchao, PENG Shaocheng,KUANG Chuan, et al.Visualization and quantitative fracture analysis of rubber mortar under in-situ loading[J]. Journal of Shenzhen University Science and Engineering, 2021, 38(2): 144-150.(in Chinese)
作者简介:张健超(1991—),深圳大学博士研究生. 研究方向:土木工程无损检测及混凝土结构耐久性. E-mail: zhangjianchao728@163.com
引文:张健超,彭少成,匡川,等.原位加载下橡胶砂浆断裂的可视化和量化分析[J]. 深圳大学学报理工版,2021,38(2):144-150.
更新日期/Last Update: 2021-03-30