Experimental Research on Fire Damage of Tunnel Lining Concrete Test Blocks

摘要：

In tunnel fire, lining concrete can be damaged to different degrees according to the water content of concrete and the temperatures it is subjected to. Three groups of C25 concrete standard test blocks with different water content were heated for 5 hours at different constant temperature respectively and put aside after being cooled. Then compressive tests and splitting tensile tests were carried out to investigate the influence of water content and temperature on the residual strength of the concrete test blocks. The results show that, Water content is the main factor causing bursting of concretes at high temperature. When temperature is below 200℃, higher water content is prevail to enhancing the residual compressive strength of concrete. After high temperature, the splitting tensile residual strength of concrete loses much quicker than the compressive residual strength, and that higher water content would aggravate the reduction of its tensile performance.

关键词： lining concrete water content high temperature residual strength burst

作者: XU Zhisheng XIE Baochao DUAN Xiongwei WU Dexing LI Weiping

作者单位: School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, Chin Zhejiang Provincial Institute of Communications Planning, Design and Research, Hangzhou 310006, Zhej

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 690-696

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）