Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates

被引：489

作者：

Bentur, A ^{[1
]}

Igarashi, S

Kovler, K

机构：

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

[2] Kanazawa Univ, Dept Civil Engn, Kanazawa, Ishikawa 920, Japan

来源：

CEMENT AND CONCRETE RESEARCH | 2001年 / 31卷 / 11期

基金：

日本学术振兴会;

关键词：

restrained autogenous shrinkage; restraining stress; high-strength concrete; lightweight aggregate; partial replacement;

D O I：

10.1016/S0008-8846(01)00608-1

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Restrained autogenous shrinkage in high-strength lightweight aggregate concrete was investigated. Effects of a partial replacement of normal-weight aggregate by lightweight aggregate on autogenous shrinkage were also discussed. The concrete with saturated lightweight aggregate exhibited no autogenous shrinkage, whereas the normal-weight concrete with the same matrix exhibited large shrink-age. A partial replacement of normal-weight aggregate by 25% by volume of saturated lightweight aggregate was very effective in eliminating the autogenous shrinkage and restrained stresses of the normal-weight concrete, It should be noted that the internal supply of water from the saturated lightweight aggregate to the high-strength cement matrix caused continuous expansion, which may be related to continuous hydration. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1587 / 1591

页数：5

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