不同养护温度下粉煤灰混凝土的收缩与徐变性能

Effect of Variable Curing Temperature on Creep Character of Fly Ash Concrete

测试了粉煤灰混凝土的收缩和徐变特性,分析了粉煤灰掺量和养护温度对混凝土收缩和徐变性能的影响规律。研究结果表明:(1)混凝土的收缩应变随养护温度的升高而增大,徐变度随温度升高而减小;(2)混凝土的收缩应变和徐变度均随粉煤灰掺量的增大而减小;(3)混凝土的收缩应变和徐变度均随加载龄期的延长而增大。

The shrinkage and creep characteristics of fly ash concrete is tested, and the influence of fly ash content and curing temperature on the shrinkage and creep properties of concrete is analyzed. The results show that:( 1 ) the shrinkage strain of concrete increases with the increase of curing temperature, while the creep decreases with the increase of temperature;( 2 ) the shrinkage strain and creep degree of concrete decreases with the increase of fly ash content;( 3 ) the shrinkage strain and creep degree of concrete increases with the extension of loading age.