EXPERIMENTAL STUDY ON BOND PROPERTIES OF NON-UNIFORMLY CORRODED DEFORMED BAR IN CONCRETE

Xu Gang; Wei Jun; Liu Defu

doi:10.13204/j.gyjz200901022

Volume 39 Issue 1

Dec. 2014

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Xu Gang, Wei Jun, Liu Defu. EXPERIMENTAL STUDY ON BOND PROPERTIES OF NON-UNIFORMLY CORRODED DEFORMED BAR IN CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(1): 101-104,121. doi: 10.13204/j.gyjz200901022

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EXPERIMENTAL STUDY ON BOND PROPERTIES OF NON-UNIFORMLY CORRODED DEFORMED BAR IN CONCRETE

doi: 10.13204/j.gyjz200901022

1.
1. School of Water Resources and Hydropower,Wuhan University,Wuhan 430072,China;
2.
2. School of Civil Engineering and Architecture,Central South University Changsha 410083,China

Received Date: 2008-03-25
Publish Date: 2009-01-20

Abstract

Abstract

Based on the electro -migration method for corrosion simulation, pull-out tests were conducted to study the bond properties of non -uniformly corroded deformed bar in concrete. The following conclusions can be drawn from this study; 1) The concrete cover-cracking is influenced not only by corrosion rate but also by area ratio of corroded bar in concrete. Under the same conditions, the larger the area ratio of corroded bar is, the smaller the corrosion rate of bar will be at the cover cracking time. 2) For member s wi thout stirrups, the bond strength will decrease at cover cracking. Then the larger the crack width is the less the bond strength will be. But for hooped members, the ultimate bond strength will not be weakened even the crack width is up to 0.2mm. 3) It is not remarkable that non-uniform corrosion influence on bond slip between concrete and deformed bar when the corrosion rate is within 2.4%
- non-uniform corrosion,
- bond properties,
- concrete,
- deformed bar

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References(7)

References

[2] Cong Q F, Karin L, Liu G C, et al. Corrosion Influence on Bond in Reinforced Concrete [J]. Cement and Concrete Research, 2004, 34(11): 2159-2167.

Al-Sulaimani G J, Kaleemullah M, Basunbul i A, et al. Influence of Corrosion and Cracking on Bond Behavior and Strength of Reinforced Concrete Members[J]. ACI Struc tural Journal, 1990, 87(2): 220-231.

[3] 赵羽习, 金伟良. 锈蚀钢筋与混凝土粘结性能的试验研究[J]. 浙江大学学报, 2002, 36(4): 352-356.

[4] 范颖芳, 黄振国, 李健美, 等. 受腐蚀钢筋混凝土构件中钢筋与混凝土粘结性能研究[J]. 工业建筑, 1999, 29(8): 49-51.

[5] 袁迎曙, 余索, 贾福萍. 锈蚀钢筋混凝土的粘结性能退化的试验研究[J]. 工业建筑, 1999, 29(11): 4-50.

[6] 徐港, 卫军, 刘红庆. 钢筋非均匀锈蚀试验研究[J]. 华中科技大学学报: 自然科学版, 2006, 34(5): 111-114.

[7] JTJ 270-98 水运工程混凝土试验规程[S].

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