应力作用下混凝土的氯离子渗透性  

CHLORIDE PENETRATION OF CONCRETE UNDER STRESS STATES

作　　者：孙继成[1] 姚燕[1] 王玲[1] 吴浩[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024

出　　处：《低温建筑技术》2011年第3期1-3,共3页Low Temperature Architecture Technology

基　　金：国家重点基础研究发展计划(2009CB623106)资助项目

摘　　要：研制了一套应力作用下混凝土渗透性装置,用于评价应力状态下混凝土的氯离子渗透性。结果表明:压应力作用下,混凝土的氯离子扩散系数随着应力比(≦0.3时)的增大而减小,而当应力比>0.3时,氯离子扩散系数则逐渐增大。而弯曲应力作用下,氯离子扩散系数则均呈增大趋势。混凝土强度等级和胶凝材料组成对压应力作用下混凝土的氯离子扩散系数影响不大。A novel permeability measurement device for concrete under stress states was developed to study chloride ion penetration of concrete under compressive and bending stress at different stress rations in this paper.The results show that chloride diffusion coefficient of concrete reduces as compressive stress ratios increasing when compressive stress level 0.3.While stress level 0.3,chloride diffusion coefficient gradually increases.However,chloride diffusion coefficient gradually increases with stress level under bending stress.Besides,concrete strength and composition of cementitious materials have a slight effect on chloride diffusion coefficient under compressive stress states.

关 键 词：应力 氯离子扩散系数 渗透性装置 

分 类 号：TU528[建筑科学—建筑技术科学]