A study has been conducted on a bond strength test of ethylene-vinyl acetate–modified ultra-high early strength cement slurry–coated rebar embedded in concrete and did a flexural loading test with the aim to verifying the feasibility of early strength cement slurry–coated rebar as a replacement for epoxy-coated rebar. Pull-out bond properties of the early strength cement slurry–coated rebar embedded in concrete with a 28-day compressive strength of 27 MPa depending on the coating thicknesses, curing ages, and polymer–cement ratios were experimentally investigated and mutually compared with two respective references consisting of a plain steel rebar and an epoxy-coated one. The effects of the uncoated, early strength cement slurry–coated, or epoxy-coated rebar embedded in a concrete beam with dimensions of 250, 350, and 3000 mm for the depth, height, and length, respectively, on the flexural loading capacity were investigated. From the results of this study, it was concluded that the early strength cement slurry–coated rebar with a coating thickness of 100 µm, and a curing time of 7 days could be competitive enough to replace epoxy-coated rebar based on the bond strength and flexural loading test results.
Nonlinearity of the stress-strain dependence of quasi-isotropic CFRP laminate under re-static loading
