Concrete composition for making concrete moldings and method for

Details Concrete composition for making concrete moldings and method for Concrete composition for making concrete moldings and method for

1979-04-05

1980-10-28

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 89, 106 97, 106 98, 106109, C04B 735

Patent

active

042304997

ABSTRACT:
A concrete composition for making concrete moldings of high strength is provided which comprises 400-600 kg. of Portland cement per unit m.sup.3 of concrete, 3-30% by weight of insoluble (Type II) anhydrous calcium sulfate and 0.1-3% by weight of cement dispersing agent. A method for making concrete moldings of high strength having the above components are also provided which comprises subjecting to pre-steaming and then steam curing under atmospheric pressure. According to the present invention, concrete moldings having both high compressive strength and pre-stress with reduced relaxation can be obtained only in a day without subjecting to autoclave curing.

REFERENCES:
patent: 2837436 (1958-06-01), Chapman et al.
patent: 2918385 (1959-12-01), Arpin et al.
patent: 3782991 (1974-01-01), Burge
patent: 3915724 (1975-10-01), Kokuta et al.
patent: 3947284 (1976-03-01), Kitsugi et al.
patent: 3973978 (1976-08-01), Nakagawa et al.

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