|
Title |
Effect of Steel Fiber Distribution in Steel Fiber-reinforced Concrete on Surface Electrical Resistivity
|
|
Keywords |
콘크리트 표면저항 ; 강섬유 ; 섬유분산도 ; 투수성 Surface resistivity of concrete ; Steel fiber ; Fiber distribution ; Permeability |
|
Abstract |
One of feasible non-destructivity test methods for evaluation of concrete permeability is the measurement of surface resistivity. But the application to steel fiber-reinforced concrete has been limited because mis-evaluation could be caused by the steel fibers in concrete. In this study, the effect of fiber distribution on surface electrical resistivity of steel fiber-reinforced concrete was investigated through experimental program. Resistivity was measured three times on four surfaces in three rectangular and circular specimens with 0.5%, 1% and 1.5% steel fibers by volume and compared each other. The results obtained from circular specimens were consistent compared to those from rectangular specimens. And the results demonstrated that the effect of fiber distribution on surface resistivity was not significant compared to that of mixing ratio of steel fibers. In conclusion, this non-destructive testing method using measurement of surface resistivity could be used for SFRC within 0.5% steel fibers by volume.
|