氯离子在砂浆中扩散的影响因素  

Factors Affecting Diffusion of Chloride Ion in Mortar System

作　　者：龙广成[1] 陈书苹[1] 谢友均[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《建筑材料学报》2008年第3期328-333,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50708114);先进土木工程材料教育部重点实验室开放基金资助项目

摘　　要：采用自然浸泡方式,测试了一定条件下外部溶液中的氯离子在砂浆中的扩散深度、可溶性氯离子含量、孔隙结构以及浆体结合氯离子性能等,进而研究了影响氯离子在砂浆中扩散的关键因素.结果表明:砂浆中氯离子扩散深度及可溶性氯离子含量与体系中孔径大于30 nm的孔隙率、浆体结合氯离子性能存在较为显著的相关性,矿渣以及氯离子结合剂的掺入可显著降低砂浆中氯离子扩散深度随浸泡龄期增加的速率.Parameters including diffusion depth of chloride ion,soluble chloride ion content,pore structure of mortar and binding chloride ion capability of corresponding paste were measured under natural diffusion condition.And then factors influencing diffusion process of chloride ion in mortar were analyzed in this paper.Results indicate that the diffusion depth of chloride ion in mortar and amount of soluble chloride ion are influenced by the porosity of big pores with diameter more than 30 nm and the binding chloride ion capability of pastes.Addition of slag and chloride ion binding agent can decrease the increasing rate of diffusion depth of chloride ion with age in mortar.

关 键 词：氯离子 扩散 孔结构 砂浆 

分 类 号：TU528.01[建筑科学—建筑技术科学]