W/B 변화에 따른 HPFRCC의 인장성능 특성

Tensile performance of HPFRCC depending on various water-to-binder ratios

Recently, there are many research for increasing tensile strength of concrete using fiber-reinforced mortar. Especially, the research about the high ductile concrete with fiber-reinforcement which behaves strain-hardening (defined as HPFRCC) is performed while it has the drawback of decreasing workability because of interruption of fibers such as fiber-ball effect. Hence to solve this problem, as a previous research, combination of metal fiber and organic fiber was suggested. Although this research achieved favorable result of workability of HPFRCC, the research scope was concentrated on workability of the mortar. Therefore, in this research, based on the fiber-combination of previous research, the tensile properties is evaluated depending on water-to-binder ratios to obtain improved tensile performance.