码头混凝土中的氯离子侵入研究  

Chloride Ingress in Concrete of Port Structures

作　　者：范宏[1] 赵铁军[2] 徐红波[2] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]青岛理工大学,山东青岛266033

出　　处：《水运工程》2006年第4期49-53,共5页Port & Waterway Engineering

基　　金：国家自然科学基金资助项目(50378045)

摘　　要：对码头的不同构件钻取了一批混凝土芯样,测量了其中CaCO3的含量和氯离子分布,分析了局部环境对碳化和氯离子分布的影响。试验结果表明,在极度潮湿环境下混凝土碳化进展缓慢,且碳化区域以未完全碳化区为主导,混凝土碳化的深度最终趋于一个极限值。局部环境可导致混凝土中氯离子分布发生较大变化,在混凝土表层氯离子侵入方式复杂,可形成一个氯离子含量平稳区段,只有在一定深度内才符合扩散机理。The specimens of concrete cores were drilled from different elements of a pier, and the content of calcium carbonate and chloride distribution from the specimens were measured, based on which, the influences of local environment on carbonation and chloride distribution were analyzed. The test result shows that the carbonation rate is slow in extremely humid environment, and the incomplete carbonation zone is dominate in carbonation zone, the depth of carbonation tends to be a limit. Chloride ions distribution is influenced greatly by local environment, and dry-wet cycles can change the chloride profile evidently and form a constant content of chloride at the layer of concrete. It conforms to the diffusion mechanism only in a certain depth.

关 键 词：氯离子 局部环境 扩散系数 芯样 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TU528[交通运输工程—船舶与海洋工程]