等温干燥条件下混凝土内部相对湿度的分布  

Internal Relative Humidity Distribution of Concrete Under Isothermal Drying Conditions

作　　者：蒋正武[1] 王培铭[1] 

机构地区：[1]同济大学混凝土材料研究国家重点实验室,上海200092

出　　处：《武汉理工大学学报》2003年第7期18-21,共4页Journal of Wuhan University of Technology

基　　金：国家"973"重大基础研究项目 ( 2 0 0 1CB610 70 4);同济大学工科基金

摘　　要：研究了不同水灰比与水泥浆体体积含量的混凝土在单轴等温干燥条件下内部相对湿度 ( Internal Relative Hu-m idity,IRH)分布以及自干燥引起的 IRH变化。结果表明 ,自干燥引起的混凝土 IRH下降随着水灰比的减小与浆体体积含量的增大而增大。对高水灰比的混凝土 ,IRH变化主要受水分扩散控制 ,而对低水灰比的混凝土 ,其不仅取决于水分扩散 。Internal relative humidity(IRH) distribution of concrete with different ratios of water to cement(w/c) and paste volume content in uniaxial isothermal drying condition and IRH changes results from self-desiccation were investigated. The results indicate that, the IRH reduction of concrete increases with the decrease of w/c and the increase of paste volume content in concrete. The IRH distribution concrete with high w/c is mainly dependent on moisture diffusion. However, the IRH distribution of concrete with low w/c is mainly dependent on self-desiccation as well as moisture diffusion.

关 键 词：干燥 相对湿度 自干燥 水分扩散 

分 类 号：TU528[建筑科学—建筑技术科学]