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http://dx.doi.org/10.4334/JKCI.2008.20.2.165

The Bond Characteristics of Deformed Bars in Recycled Coarse Aggregates Concrete (RCAC)  

Jeon, Su-Man (Dept. of Architectural Engineering, Chungnam National University)
Yun, Hyun-Do (Dept. of Architectural Engineering, Chungnam National University)
Choi, Ki-Sun (Korea Institute of Construction Technology)
You, Young-Chan (Korea Institute of Construction Technology)
Kim, Keung-Hwan (Korea Institute of Construction Technology)
Publication Information
Journal of the Korea Concrete Institute / v.20, no.2, 2008 , pp. 165-173 More about this Journal
Abstract
One of the most important requirements for reinforced concrete constructions is the bond behavior between concrete and reinforcement. For practical application, it is very important to study bond behavior of reinforcing bars in recycled aggregate concrete (RAC). Thirty six pull-out tests were carried out in order to investigate the bond behaviour between recycled coarse aggregate concrete (RCAC) and deformed bars. RCA replacement ratios (i.e., 0%, 30%, 60% and 100%) and positions of deformed bar (i.e., vertical and horizontal position) were considered as variables in this paper. Each specimen was in the form of a cube, with edges of 150 mm in length and for the pull-out tests, a deformed bar, 13 mm in diameter, was embedded in the center of each specimen. Based on the test results, the bond strength between the RCAC and deformed bars were influenced by both RCA replacement ratios and positions of deformed bars. It was found that under the equivalent mix proportion (i.e., the mix proportions are the same, except for different RCA replacement ratios), the bond strength between the RCAC and the ribbed bar has no obvious relation with the RCA replacement ratio, whereas the positions of deformed bars have a significant effect on the bond behavior between the RCAC and deformed bars. Under the condition of same RCA replacement ratio, the specimen of horizontal reinforcement at upper position (HU type) appear considerably low bond stress.
Keywords
recycled coarse aggregate (RCA); replacement ratio; bond strength; pull-out;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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