RESEARCH ON BONDING PERFORMANCE BETWEEN REBAR AND POLYMER CEMENT MORTAR AFTER BEING SUBJECTED TO HIGH TEMPERATURES

DENG Jun; HUANG Haifan; XIE Yan; CHEN Jianhua

doi:10.13204/j.gyjzG20102907

Volume 51 Issue 5

Sep. 2021

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DENG Jun, HUANG Haifan, XIE Yan, CHEN Jianhua. RESEARCH ON BONDING PERFORMANCE BETWEEN REBAR AND POLYMER CEMENT MORTAR AFTER BEING SUBJECTED TO HIGH TEMPERATURES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 51-55,62. doi: 10.13204/j.gyjzG20102907

Citation:

DENG Jun, HUANG Haifan, XIE Yan, CHEN Jianhua. RESEARCH ON BONDING PERFORMANCE BETWEEN REBAR AND POLYMER CEMENT MORTAR AFTER BEING SUBJECTED TO HIGH TEMPERATURES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 51-55,62. doi: 10.13204/j.gyjzG20102907

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RESEARCH ON BONDING PERFORMANCE BETWEEN REBAR AND POLYMER CEMENT MORTAR AFTER BEING SUBJECTED TO HIGH TEMPERATURES

doi: 10.13204/j.gyjzG20102907

1. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

Received Date: 2020-10-29
Available Online: 2021-09-16
Publish Date: 2021-09-16

Abstract

Abstract

Polymer cement mortar (PCM) has been widely used in the reinforcement of reinforced concrete structure because of its good bond with concrete, but the law of bond degradation between PCM and rebar at high temperatures is still unclear. Experimental studies were conducted on the bonding properties of rebar and PCM under different temperatures and cooling methods. The results showed that:1) the failure modes of the specimens under natural cooling were split and split pull-out, and the corresponding failure modes of the water-cooled specimens were split pull-out and pulled out; 2)the influence of cooling mode on bond strength increased with the increase of temperature; 3)different cooling methods would lead to different failure forms of specimens, which would affect the slip amount of specimens; 4)with the increases of temperature, the bond strength of the specimen decreased and the slip amount increased. According to the experimental results, the high temperature degradation model of rebar-PCM bond strength was established, which could provide a reference for practical engineering.
- PCM,
- bonding performance,
- heating temperature,
- cooling method,
- stiffness degradation

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References(15)

References

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