混凝土氯离子扩散性能与时间关系的试验研究  

Experiment study on relationship between chloride diffusion in concrete and time

作　　者：周胜兵[1] 周剑[1] 张俊芝[1] 王建东[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《混凝土》2011年第4期46-47,50,共3页Concrete

基　　金：国家自然科学基金项目(50879079)

摘　　要：通过设计的考虑单一养护时间因素的试验,用NEL法测定了不同配合比、标准养护时间不同的混凝土的氯离子扩散系数。试验的结果表明,混凝土扩散系数随着养护时间的延长而降低,在混凝土成型250 d后扩散系数的降低幅度明显减缓。A series test to study the relationship is designed,in which curing time is the single affect factor,diffusion coefficients in concrete of different mix proportion after different standard curing time are measured in NEL method.The result show that diffusion coefficients in concrete of all mix proportion are all decrease with extending of curing time,and the decrease range of diffusion coefficients is slow after pouring 250 d obviously.

关 键 词：氯离子 扩散系数 衰减 养护时间 NEL法 

分 类 号：TU528.01[建筑科学—建筑技术科学]