中文摘要：

高强混凝土的自收缩是导致其开裂的重要因素.为此,对不同水胶比的粉煤灰混凝土在水化初期的强度发展与自收缩的关系进行了研究.结果显示,粉煤灰混凝土的强度与自收缩均随着水胶比增加而下降,并随着粉煤灰掺量的增加而近似线性下降.各种组成的混凝土的自收缩均表现为水化第1d内快速增加,随后缓慢增加.混凝土的收缩特性可根据其力学性能来预测.

英文摘要：

The autogenous shrinkage of high strength concrete is a serious factor to increase cracking risk of concrete structure.The relationship between the strength development and autogenous shrinkage of fly ash concrete with different water-binder ratios in early hydration age was investigated.The results show that autogenous shrinkage and strength of concrete containing fly ash decrease with the increase of water-binder ratio,but quasi-linearly decrease with the increase of fly ash dosage.The autogenous shrinkage of concrete with various mix proportions consists of a rapidly increasing stage in the first hydrating day and a gently increasing stage in the later time.The shrinkage performance of concrete could be predicted through its mechanical property.