不同强度等级混凝土冻融损伤后抗氯离子渗透性能试验研究  

The Experimental Study on Chloride Penetration Resistance of Concrete after Freeze-thaw Damage

作　　者：时瑞国 张雅娜 SHI Rui-guo;ZHANG Ya-na(Xingtai Polytechnic College,Xingtai,Hebei 054035,China;Zhongji Petrochemical Engineering Design Corporation,Baoding,Hebei 071000,China)

机构地区：[1]邢台职业技术学院建筑工程系,河北邢台054035 [2]中冀石化工程设计有限公司,河北保定071000

出　　处：《邢台职业技术学院学报》2021年第1期83-87,共5页Journal of Xingtai Polytechnic College

摘　　要：本文通过反复冻融试验,利用RCM法(即非稳态快速氯离子迁移系数法)测定混凝土冻融损伤后氯离子的扩散系数,分析各冻融损伤参量(冻融循环次数、抗压强度、质量损失)与氯离子扩散系数之间的关系,分析研究冻融损伤对混凝土抗氯离子渗透性能的影响。结果表明随着冻融循环次数的增加,混凝土氯离子迁移系数会不断增大,两者呈现出非线性增长关系;高强度等级的混凝土冻融损伤后,抗氯离子渗透性能要好一些。In this paper,through the repeated freeze-thaw test,the RCM method(the unsteady fast chloride ion mobility coefficient method)was used to determine the diffusion coefficient of chloride ions after freeze-thaw damage.The relationship between freeze-thaw damage parameters(freeze-thaw cycle number,compressive strength,mass loss)and chloride ion diffusion coefficient was analyzed,and the effect of freeze-thaw damage on the chloride ion penetration resistance of concrete was analyzed.The results showed that the chloride ion mobility coefficient of concrete would increase with the increase of the number of freeze-thaw cycles,and their relationship is nonlinear;and the chloride ion penetration resistance of high-strength grade concrete would be better after freeze-thaw damage.

关 键 词：混凝土 冻融循环 氯离子渗透 质量损失 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]