An experimental study on the bond strength between reinforcement bars and concrete as a function of concrete cover, strength and corrosion level

被引：207
|
作者：
Yalciner, Hakan [1 ]
Eren, Ozgur [1 ]
Sensoy, Serhan [1 ]
机构：
[1] Eastern Mediterranean Univ, Dept Civil Engn, TR-10 Gazimagusa, Mersin, Turkey
来源：
CEMENT AND CONCRETE RESEARCH | 2012年 / 42卷 / 05期
关键词：
Corrosion; Pullout test; Bond strength; Bond-slip;
D O I：
10.1016/j.cemconres.2012.01.003
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The effect of corrosion on the bond strength between reinforcement bars and concrete was studied in a series of experiments. An accelerated corrosion method was used to corrode the reinforcement bars embedded in concrete specimens. Pullout tests were performed to develop an empirical model for the ultimate bond strength by evaluating bond strengths in two different concrete mixes, three concrete cover depths and different mass losses of reinforcement bars after corrosion. Bond-slip relationships for the different corrosion levels were compared. It was found that the relationship between bond strength and concrete strength in uncorroded specimens differed from that of corroded specimens set in high-strength concrete because of brittleness in the corroded specimens, which caused a sudden loss of bond strength. The results revealed that specimens with higher concrete strength levels and corroded reinforcements showed a higher percentage of bond strength degradation due to concrete cracking during the pullout tests. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：643 / 655
页数：13
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