摘要
对普通混凝土(OPC)和高性能混凝土(HPC)进行了现场海洋暴露试验,并根据自然扩散法的原理,通过分层取样和化学分析方法测定了海洋大气区、潮汐区和水下区混凝土的总Cl-质量分数和自由Cl-质量分数,研究了OPC与HPC在现场海洋区域环境中的Cl-扩散规律、Cl-结合能力和表面Cl-质量分数随暴露时间的变化规律.试验结果表明:混凝土的自由Cl-质量分数随着扩散深度的增加而递减,两者呈二次函数关系;混凝土的总Cl-质量分数与自由Cl-质量分数具有很好的线性关系.
Field exposure tests on ordinary performance concrete （OPC） and high performance concrete （HPC） were carried out. Based on the principle of the natural diffusion method, the stratified sampling and chemical analysis methods were employed to investigate total and free chloride ion mass fractions of the concrete in the marine atmospheric, tidal and submerged zones. The chloride ion diffusion law, the chloride ion binding capacity and the variation of the surface chloride ion mass fraction with exposure time of OPC and HPC in regional marine environments were studied. The test results show that the free chloride ion mass fraction decreases with the increase of the diffusion depth, and a quadratic function relationship between them is displayed. The total and free chloride ion mass fractions have a good linear relationship.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期410-414,共5页
Journal of Hohai University(Natural Sciences)
基金
中国博士后科学基金(20060400284)
江苏省博士后科研资助计划(0602018B)
江苏省自然科学基金(BK2005216)
关键词
普通混凝土
高性能混凝土
海洋环境
暴露试验
氯离子
扩散行为
结合能力
ordinary performance concrete
high performance concrete
marine environment
exposure test
chlorideion
diffusion behavior
binding capacity
