POLYPROPYLENE FIBER FOR CEMENT REINFORCEMENT, FIBER-REINFORCED MOLDED CEMENT MADE WITH THE POLYPROPYLENE FIBER FOR CEMENT REINFORCEMENT, METHOD OF CONSTRUCTING CONCRETE STRUCTURE WITH THE POLYPROPYLENE FIBER FOR CEMENT REINFORCEMENT, AND METHOD OF CONCRETE SPRAYING WITH THE POLYPROPYLENE FIBER FOR CEMENT REINFORCEMENT

摘要

PROBLEM TO BE SOLVED: To provide a polypropylene fiber for reinforcing cement which is capable of giving hydrophilicity to a polyolefin resin fiber, excellent in dispersibility in cement, excellent in physical bonding with cement and capable of improving bending toughness of a cement molding.;SOLUTION: A composition contains a complex structure graft copolymer of 1-10pts.wt. consisting of an ethylene-vinyl acetate copolymer segment of 50-90wt.% and a vinyl-base polymer segment of 50-10wt.% to polypropylene of 100pts.wt. After the composition is spun, the polypropylene fiber for reinforcing cement is produced by cutting a monofilament, whose surface is worked with projection and recessed parts and whose single yarn fineness is 200dt or higher, to fiber length of 5mm or more.;COPYRIGHT: (C)2004,JPO