The Antifreeze Critical Strength of Low-temperature Concrete Effected by Index  

作　　者：刘军 

机构地区：[1]School of Material Science and Engineering,Shenyang Jianzhu University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2011年第2期355-360,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Technology R&D Program of China for the 11th Five-Year Plan(2006BAJ04A04);the Natural Science Foundation Project of Liaoning Province(20082008);the Nationd Natural Science Foundation of China(51072122)

摘　　要：The antifreeze critical strength and the pre-curing time of low-temperature concrete were studied by means of guaranteed rate of compressive strength and antifreeze performance for the structural safety requirement of concrete engineering,suffering once freeze damage under air environment.It is shown that the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-32 h by guaranteed rate of compressive strength,and the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-32 h by guaranteed rate of antifreeze performance.It can be found that the method of guaranteed rate of compressive strength is sensitive to the defect which generated by freeze damage in the concrete interior.The method is fit to evaluate the antifreeze critical strength of low-temperature concrete.The antifreeze critical strength and the pre-curing time of low-temperature concrete were studied by means of guaranteed rate of compressive strength and antifreeze performance for the structural safety requirement of concrete engineering,suffering once freeze damage under air environment.It is shown that the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-32 h by guaranteed rate of compressive strength,and the antifreeze critical strength is 3.7-4.4MPa,pre-curing time is 18-32 h by guaranteed rate of antifreeze performance.It can be found that the method of guaranteed rate of compressive strength is sensitive to the defect which generated by freeze damage in the concrete interior.The method is fit to evaluate the antifreeze critical strength of low-temperature concrete.

关 键 词：guaranteed rate of compressive strength guaranteed rate of antifreeze performance antifreeze critical strength once freeze under air environment 

分 类 号：TU528[建筑科学—建筑技术科学]