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http://dx.doi.org/10.5345/JKIBC.2017.17.4.331

The Effects of Curing Age and Thickness of Coating Material on the Bond Strength of PCS-Coated Rebar to Cement Concrete  

Jo, Young-Kug (Department of Architectural Engineering, Chungwoon University)
Publication Information
Journal of the Korea Institute of Building Construction / v.17, no.4, 2017 , pp. 331-339 More about this Journal
Abstract
The purpose of this study is to evaluate the effect of curing age and thickness of coating material on the bond strength of polymer cement slurry(PCS)-coated rebar that can replace epoxy-coated rebar. The test specimens were prepared with two types of cement, two types of polymer dispersion as St/BA and EVA, two polymer-cement ratios, two coating thicknesses and three curing ages, and tested for bond strength test to cement concrete. The flexural behavior of RC beam that is made by optimum conditions such as polymer-cement ratio of 80%, coating thickness of $100{\mu}m$ and curing age of 7 days of PCS recommended from the bond strength test is also conducted. From the test results, The maximum bond strength of PCS-coated rebar at curing age of 7-day and coating thickness of $100{\mu}m$ was about 1.52 and 1.58 times respectively, the strength of plain and epoxy-coated rebar. The ultimate loads of RC beam using PCS-coated rebar were range of 81.1% to 102.3% of that of plain rebar, and 98.4% to 124.1% of that of epoxy-coated rebar. It is apparent that PCS-coated rebar with EVA, curing age at 7-day and $100{\mu}m$ can replace epoxy-coated rebar in construction field.
Keywords
polymer cement slurry; curing age; coating thickness; polymer-cement ratio; bond strength;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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