混凝土表层氯离子含量峰值分布和对流区深度  

Peak Value Distribution of Surface Chloride Concentration and Convection Depth of Concrete

作　　者：王传坤[1] 高祥杰[1] 赵羽习[1] 金伟良[1] 徐巧玲[1] 

机构地区：[1]浙江大学结构工程研究所,杭州310058

出　　处：《硅酸盐通报》2010年第2期262-267,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金重点项目(No.53538070);杭州湾跨海大桥指挥部科研项目

摘　　要：本文以浙江嘉兴乍浦港码头为依托,通过试验检测并结合分析讨论,研究比较了水下区和干湿交替区混凝土表层0～10mm范围内氯离子含量的分布规律,确定了干湿交替区的表层氯离子含量峰值分布和对流区深度。结果表明,干湿交替区对流区氯离子含量在一定深度处存在着一个局部的峰值,之后随着深度的增加逐渐降低,该峰值出现的位置即认为对流区深度;水下区表层氯离子含量随深度的增加而降低,不存在局部峰值和对流区。试验检测数据表明混凝土码头干湿交替区对流区深度随高程的变化而波动,但整体上都在7mm左右,从而为沿海混凝土结构的耐久性寿命预测提供了参考依据。Based on a dock of Zhapu port in Jiaxing of Zhejiang, the surface chloride concentration distribution law within the scope of 0-10 mm of concrete was compared between in underwater zone and in dry-wet cycling zone by means of experimental testing, analysis and discussion in the paper. And peak values distribution of surface chloride concentration and convection depths of dry-wet cycling zone were also decided. Results show that the surface chloride concentration in dry-wet cycling zone has a local peak value and then reduce gradually with the depth increasing. The location of the peak value is the convection depth. With the depth increasing, the surface chloride concentration in underwater zone is reduced without local peak values and convection zone. Testing data showed that convection depths of the concrete dock are fluctuated with the altitude changes and the average is about 7 mm, which could be used for the durability life prediction of coastal concrete structures.

关 键 词：氯离子 水下区 干湿交替区 表层氯离子含量 对流区深度 

分 类 号：TU521[建筑科学—建筑技术科学]