New approach for shrinkage prediction of high-strength lightweight aggregate concrete

被引：48
作者：
Costa, Hugo [1 ,2 ]
Julio, Eduardo [2 ]
Lourenco, Jorge [1 ]
机构：
[1] Polytech Inst Coimbra, Dept Civil Engn, P-3030199 Coimbra, Portugal
[2] Univ Tecn Lisboa, Inst Super Tecn, Dept Civil Engn & Architecture, ICIST, P-1049001 Lisbon, Portugal
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 35卷
关键词：
Shrinkage; High-strength; Lightweight aggregate concrete (LWAC); AUTOGENOUS SHRINKAGE; CEMENT PASTE; REDUCING ADMIXTURES; PERFORMANCE;
D O I：
10.1016/j.conbuildmat.2012.02.052
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The use of saturated lightweight aggregates (LWAs) on concrete provides an efficient internal curing, resulting in reduced shrinkage. Codes predict concrete shrinkage based on concrete strength, type of cement, geometry and curing conditions, being mixture design parameters neglected. Herein, an experimental study is presented, considering several high-strength lightweight aggregate concrete (HSLWAC) mixtures with different densities and compressive strengths. Compared to codes prediction, significantly lower shrinkage values were measured. It was concluded that, besides the parameters considered by codes, HSLWAC shrinkage also depends on the type, dosage and moisture of LWA. A new approach for shrinkage prediction of HSLWAC is presented. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：84 / 91
页数：8
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