Polypropylene fiber for cement reinforcement, molded cement...

C - Chemistry – Metallurgy – 04 – B

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C04B 16/06 (2006.01) C04B 28/02 (2006.01) D06M 10/02 (2006.01) D06M 11/07 (2006.01) E04C 5/07 (2006.01) E04G 21/02 (2006.01)

Patent

CA 2502163

Polyolefin resin fibers for cement reinforcement which have hydrophilicity imparted thereto and show excellent adhesion to cement matrixes. The fibers are ones which have been formed from a polypropylene resin by spinning and have undergone a surface modification treatment selected between 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.

L'invention concerne des fibres de résine de polyoléfine destinées au renforcement du ciment à propriété hydrophile et présentant une excellent adhérence à des matrices de ciment. Ces fibres ont été fabriquées à partir de résine polypropylène par centrifugation et ont été soumises à un traitement de modification de surface choisi entre un traitement d'oxydation et un traitement de fluoration de sorte que la surface fibreuse possède un indice de mouillage de 38 dyne/cm ou plus. Les fibres de résine de polypropylène destinées au renforcement du ciment, donnent des moulages de ciment améliorés quant à l'endurance à la flexion telle que la résistance à la flexion et la résistance aux chocs, lorsque ceux-ci sont utilisés dans l'application ou le placement de divers mortiers ou bétons.

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