Effect of lightweight aggregates on the mechanical properties and brittleness of lightweight aggregate concrete

被引：142
|
作者：
Cui, H. Z. [2 ]
Lo, Tommy Yiu [1 ]
Memon, Shazim Ali [1 ]
Xu, Weiting [1 ]
机构：
[1] City Univ Hong Kong, Dept Civil & Architectural Engn, Hong Kong, Hong Kong, Peoples R China
[2] Shenzhen Univ, Coll Civil Engn, Shenzhen, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 35卷
关键词：
Lightweight aggregate concrete; Compressive strength; Young's modulus; Shape Index; Proportional strain ratio; COARSE AGGREGATE; STRENGTH; ASH; SHAPE;
D O I：
10.1016/j.conbuildmat.2012.02.053
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The influence of volume fraction and aggregate properties on the mechanical performance of lightweight aggregate concrete (LWAC) were studied. A new Shape Index that described the shape characteristics of lightweight aggregate (LWA) has been proposed and its effects on resulting LWAC were evaluated. Test results substantiate that the proposed Shape Index had a great influence on the mechanical properties of LWAC. Crack development, failure characteristics and stress strain curves of LWAC were studied and the concept of the proportional strain ratio was introduced to evaluate the brittleness of LWAC. Test results showed that higher volume content of LWA resulted in a more brittle failure. It was also found out that for similar concrete strengths, LWAC was comparatively brittle than normal weight concrete (NWC). (C) 2012 Elsevier Ltd. All rights reserved.
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页码：149 / 158
页数：10
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