Behaviour of recycled aggregate concrete under drop weight impact load

被引：135

作者：

Rao, M. Chakradhara ^{[1
]}

Bhattacharyya, S. K. ^{[2
]}

Barai, S. V. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India

[2] CSIR, Cent Bldg Res Inst, Roorkee 247667, Uttar Pradesh, India

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2011年 / 25卷 / 01期

关键词：

Recycled coarse aggregate (RCA); Recycled aggregate concrete (RAC); Low velocity impact; Tensile strain; Compressive strength; Acceleration; Displacement; MECHANICAL-PROPERTIES; BEAMS; STRENGTH; WASTE;

D O I：

10.1016/j.conbuildmat.2010.06.055

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents the experimental results of recycled aggregate concrete (RAC) beams prepared with different amount of recycled coarse aggregate (RCA) subjected to low velocity impact. The recycled coarse aggregates are obtained from a demolished RCC culvert. Four concrete mixes with 0%, 25%, 50% and 100% RCA respectively are prepared. With each mix three beam specimens of size 1.15 x 0.1 x 0.15 m are prepared and tested under drop weight impact load. The behavior of the RAC beams are studied in terms of acceleration, strains and support reaction histories under impact load in addition to the physical and mechanical characteristics of RCA and RAC. It is observed that 25% RCA does not influence the strength of concrete. In addition, it is found that for a given impact energy (the energy imparted by the hammer per blow) the reactions and strains of RAC with 50% and 100% RCA are significantly lower and higher respectively than those of normal concrete and RAC with 25% RCA. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：69 / 80

页数：12

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