Carbon fibers for reinforcement of cement and cement composite m

Details Carbon fibers for reinforcement of cement and cement composite m Carbon fibers for reinforcement of cement and cement composite m

1995-07-14

1997-11-11

Lee, Helen

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428408, 428413, D04H 158, B32B 900

Patent

active

056861818

ABSTRACT:
There are here disclosed carbon fibers for reinforcement of cement which are obtained by applying, onto the surfaces of carbon fibers, esters of oleic acid and aliphatic monovalent alcohols, esters of oleyl alcohol and monovalent fatty acids, polyoxyalkylene bisphenol ethers or polyether esters as sizing agents, and a cement composite material having a bending strength of 300 kgf/cm.sup.2 or more which contains cut carbon fibers having a fiber length of 10 to 50 mm at a mixing volume ratio of the cut carbon fibers to the cement matrix in the range of 1 to 5%. According to the present invention, there are provided the carbon fibers for reinforcement of cement which have excellent adhesive properties to the cement, good process passage properties through a direct spray gun and good bundling properties and which are suitable for a direct spray method, and the cement composite material using the carbon fibers and having high bending strength.

REFERENCES:
patent: 4420512 (1983-12-01), Ogawa et al.
patent: 4751258 (1988-06-01), Minami
patent: 4904818 (1990-02-01), Minami et al.
patent: 5062897 (1991-11-01), Katsumata et al.
patent: 5334419 (1994-08-01), Minami et al.
Chemical Abstracts, vol. 117, No. 10, Sep. 7, 1992, AN 96339a, F.Nakao, et al., "Carbon Fiber for Reinforcement of Cement".

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