高性能混凝土的自收缩及测试方法探讨

在研究了国内外相关文献资料的基础上,对高性能混凝土自收缩的定义、形成机理和测试方法提出了自己的观点。在定义上,明确了高性能混凝土自收缩产生的时间、与其他体积变形的区别与联系;在形成机理上,自收缩应是混凝土水化收缩和内部自身相对湿度下降的共同结果;在测试技术上,提出了准确测试自收缩的方法及今后测试工作的重点。

Study on autogenous shrinkage and the measurement of high performance concrete

Based on the study to relative material in China and foreign countries,the opinion on the definition,formation mechanism and the measurement method on the autogenous shrinkage of high performance concrete(HPC) were put forward by the author.On the definition,the time of autogenous shrinkage formation in high performance concrete and discrimination as well as the relationship with other volume deformations were definituded.On the formation mechanism,the autogenous shrinkage should be the result of water and chemical shrinkage and the reduction of internal relative humidity in concrete.On the measurement method,the key points on later measurement work and precise measurement method were proposed too.