Experimental Study of Fatigue Damage Strength of Concrete Lining under Dry-Wet Cycles

3rd Annual International Workshop on Materials Science and Engineering

Zhang, Yan^1 ; Dai, Jun^1 ; Zheng, Xuanrong^1 ; Zhang, Xinyan^1 ; Li, Ning^2

Institute of Geotechnical Engineering, Xi'An University of Science and Technology, Xi'an, Shaanxi

710054, China^1

Institute of Rock and Soil Mechanics, Xian University of Technology, Xi'an

710048, China^2

关键词: Cement based material;    Concrete linings;    Concrete strength;    Damage strength;    High temperature;    Loss of strength;    Number of cycles;    Quantitative result;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012061/pdf
DOI  :  10.1088/1757-899X/250/1/012061

来源: IOP

【 摘 要 】

The laboratory mortar test is used to simulate the actual force state of concrete lining in a dry-wet cycling environment of a high-temperature tunnel. The influence characteristics of temperature and the number of cycles on the lining concrete strength and strain are also explored. The test results suggest that the number of cycles has a great impact on the deterioration of the mechanical properties of the cement-based materials. During the early period, the higher the temperature, the more serious the loss of strength. As the number of cycle increases, the strength damage caused by dry-wet cycles gradually increases. Mortar test shows the fibbers have a good fatigue resistance. The quantitative results presented in this paper can be used as reference in similar projects.