主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
Fire Science and Technology

Fire Science and Technology ›› 2025, Vol. 44 ›› Issue (2): 236-241.

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Experimental study on shear behavior of concrete grout interface after elevated temperature

Xu Chen1, Mao Xiaoyong1,2, Zhu Yong1, Cai Xinjiang1   

  1. (1. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou Jiangsu 215011, China;2. Suzhou City University, Suzhou Jiangsu 215104, China)
  • Received:2024-04-10 Revised:2024-08-02 Online:2025-02-15 Published:2025-02-15

Abstract: In order to investigate the shear behavior of the fiber reinforced high-strength concrete grout interface after high temperature exposure, Z-type double-sided shear specimens were designed and tested by means of heating and push-out shear tests. The test parameters considered in this work included temperatures of 20, 100, 300, 500 and 600 ℃, interface roughness and grouting strength. The results indicate that the shear resistance of the interface decreases with the increase in temperature. By improving the interface roughness, the shear resistance of the interface was enhanced and the enhancement decreased under elevated temperatures. Moreover, the shear resistance of the interface was found to be positively correlated to the strength grade of grouting materials.

Key words: post-elevated-temperature, concrete-CGM interface, shear resistance, interface roughness