Geometry and Volume Fraction of Polypropylene Fiber in Cement Based Composites for Fire Resistnace

시멘트 복합체의 내화성능 향상을 위한 폴리프로필렌 섬유의 형상과 혼입량 결정

The addition of polypropylene fibers is effective to avoid spalling of shotcrete and concrete adopted tunnel and underground structure under the fire. In this study, a cement based mortar for fire resistance of polypropylene fiber was developed and evaluated by experimentally. The geometry and amount of polypropylene fibers which are diameter, length and fiber dosage were significant factors in aspect of the response values of fire resistance.