Autogenous shrinkage and induced restraining stresses in high-strength concretes

被引：128

作者：

Igarashi, S ^{[1
]}

Bentur, A ^{[1
]}

Kovler, K ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Civil Engn, Natl Bldg Res Inst, IL-32000 Haifa, Israel

来源：

CEMENT AND CONCRETE RESEARCH | 2000年 / 30卷 / 11期

基金：

日本学术振兴会;

关键词：

high-performance concrete; silica fume; shrinkage; creep; tensile properties;

D O I：

10.1016/S0008-8846(00)00399-9

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Development of internal stresses induced by restrained autogenous shrinkage in high-strength concretes at early ages was investigated. Effects of water/binder ratio and the presence of silica fume on the stress developed were evaluated and considered in conjunction with the creep behavior of the concretes. The restrained autogenous shrinkage resulted in a relatively high stress that sometimes caused premature cracking in the high-strength concrete. This occurred mainly when the ratio between the restraining stress and the tensile strength approached 50%. The stresses were not as high as expected from the autogenous shrinkage, since considerable relaxation took place due to creep. Thus, the viscoelastic nature of the concrete at early age has a considerable influence on the stresses generated. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1701 / 1707

页数：7

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