|
Title |
Bond Strength of Steel Fiber Incorporated in Ultra High Performance Fiber-Reinforced Concrete
|
|
DOI |
https://doi.org/10.4334/JKCI.2013.25.5.547 |
|
Keywords |
초고성능 섬유보강 콘크리트 ; 강섬유 ; 인발실험 ; 부착강도 UHPFRC ; steel fiber ; pullout test ; bond strength |
|
Abstract |
This study was intended to estimate the bond strength of steel fiber in UHPFRC through pullout test. The pullout test was carried out with the double-sided pullout specimens with multiple fibers. First, the effect of fiber density on the bond strength was investigated, and the experimental result presented that the density range considered in this study was proved not to produce fiber-to-fiber interaction. The bond strength was estimated from several methods, which are based on the pullout load or energy at peak load, and the total energy absorbed until fibers are pulled out completely. the estimated bond strength obtained from the total energy was shown to be under the influence of the embedded length of fiber. the bond strengths obtained from peak load condition was 6.64 MPa in average, which had little difference compared to 6.46 MPa calculated by peak load only. Considering simplicity of test and analysis, it may be no matter to estimate the bond strength from peak load in pullout test.
|