In general, polymer cement slurry(PCS) that is made from organic polymer dispersion and cement has good adhesion to steel and cement concrete. Bond strength of PCS-coated rebar is better than that of plain rebar and epoxy-coated rebar. The maximum bond strength of PCS-coated rebar at curing age of 1-day or 3-hour is almost same as that of curing age of 7-day and 28-day. It is possible that PCS-coated rebar with coating thickness of 100㎛ at curing age of 1-day and 3-hour can replace epoxy-coated rebar. It is also apparent that the choice of curing age and coating thickness is very important to improve the bond strength of PCS-coated rebar to cement concrete.

• 양주경(정회원, 청운대학교 토목환경공학과 교수, 공학박사) | Yang, Joo kyung
• 조영국(정회원, 청운대학교 건축시스템공학과 교수, 공학박사) | Jo, Young Kug