The Effects of Curing Age and Thickness of Coating Material on the Bond Strength of PCS-Coated Rebar to Cement Concrete
도장재의 양생재령과 도장두께가 PCS 도장철근과 시멘트 콘크리트와의 부착강도에 미치는 영향

Young-Kug Jo
2017 Journal of the Korea Institute of Building Construction  
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
more » ... ade by optimum conditions such as polymer-cement ratio of 80%, coating thickness of 100㎛ 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㎛ 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㎛ can replace epoxy-coated rebar in construction field.
doi:10.5345/jkibc.2017.17.4.331 fatcat:dsy56dmv4rgchf43nxgktcm5ty