Polypropylene fiber for cement reinforcement, molded cement made with the fiber, method of constructing concrete structure, and method of spray concreting
OwnerMasuo Yabuki, Kazumasa Nakashimainventors
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Abstract
Polyolefin resin fibers for cement reinforcement which have hydrophilicity imparted thereto and show excellent adhesion to cement matrices. The fibers are ones which have been formed from a polypropylene resin by spinning and have undergone a surface modification treatment selected from oxidation treatment and fluorination treatment so that the fiber surface has an index of wetting of 38 dyn/cm or higher. The polypropylene resin fibers for cement reinforcement, when used in the application or placing of various mortars or concretes, give cement moldings improved in flexural toughness, such as flexural strength and impact strength.
Claims10
1-7. (canceled)
Polypropylene fiber for cement reinforcement, comprising:
- fibers spun out of polypropylene resin, said fibers having undergone a surface modification treatment selected between oxidation treatment and fluorination treatment so that a fiber surface has an index of wetting of 38 dyn/cm or more.
Polypropylene fibers for cement reinforcement, comprising:
- monofilament spun out of polypropylene resin, said monofilament having single yarn fineness of 200 dt or more with irregularities on their surfaces, and having undergone a surface modification treatment selected between oxidation treatment and fluorination treatment so that a monofilament surface has an index of wetting of 38 dyn/cm or more.
Dependencies are inferred from the claim text.