STUDY ON THE FORECASTING OF SURPLUS SERVICE LIFE OF CARBONATION IN FIRE-DAMAGED CONCRETE STRUCTURE
Fire hazards do great harm to the durability of concrete structure, and the high temperature caused by the fire hazards may speed up the carbonation and deteriorate the mechanical property of concrete. Through the analysis of experimental results, this paper finds Ca(OH)2 has greatly changed into GaCO3 when the temperature varied from 400℃ to 500℃. Based on the stochastic model for concrete carbonation under the atmospheric environment, the temperature distribution theory is introduced, which assumes the region has been totally carbonized when the temperature reaches 400℃. The carbonation depth confirmed by the temperature distribution theory is substituted into the stochastic model for concrete carbonation under the atmospheric environment, and the equivalent carbonation time and the surplus service life of fire-damaged concrete structure can be deduced. In the study case, the high temperature caused by the fire hazards can greatly shorten the surplus service life of concrete construction.
Fire hazards Carbonation Temperature distribution theory Surplus service life
Zhi-Wu Yu Wei Zi Xiao-Jie Liu
College of Civil Engineering, Central South University, Changsha 410075, P.R. China
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1385-1388
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）