Compressive behaviour of recycled aggregate concrete under impact loading

被引：250
|
作者：
Xiao, Jianzhuang [1 ,2 ]
Li, Long [1 ,4 ]
Shen, Luming [3 ]
Poon, Chi Sun [4 ]
机构：
[1] Tongji Univ, Coll Civil Engn, Dept Struct Engn, Shanghai 200092, Peoples R China
[2] Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 200092, Peoples R China
[3] Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia
[4] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
来源：
CEMENT AND CONCRETE RESEARCH | 2015年 / 71卷
基金：
澳大利亚研究理事会; 中国国家自然科学基金;
关键词：
Recycled aggregate concrete (RAC); Compressive behaviour; High strain rate; Impact loading; Split Hopkinson Pressure Bar (SHPB); HIGH-STRAIN RATES; CEMENT PASTE; MECHANICAL-PROPERTIES; STRENGTH; REPLACEMENT; MORTAR;
D O I：
10.1016/j.cemconres.2015.01.014
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The compressive behaviour of recycled aggregate concrete (RAC) with different recycled coarse aggregate (RCA) replacement percentages was experimentally investigated under quasi-static to high strain rate loading. Quasi-static tests at a strain rate of 10(-5)/s were first carried out using a stiff-framed servo-hydraulic machine. Impacting tests at strain rates ranging from 10(1)/s to 10(2)/s were then performed using a 74 mm-diameter Split Hopkinson Pressure Bar (SHPB) facility. The strain rate effects on the failure pattern, compressive strength, initial elastic modulus and peak strain were studied. The results showed that the compressive strength and initial elastic modulus increased with increasing strain rate while the peak strain did not display clear strain rate dependence. At high strain rates the compressive strength decreased with increasing RCA replacement percentage, whereas the dynamic increase factor (DIF) showed a reverse tendency. Furthermore, the dynamic compressive strength of wet RAC was lower than that of naturally dried RAC. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：46 / 55
页数：10
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