High early strength cement

Details High early strength cement High early strength cement

1981-08-03

1982-09-21

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106104, 106109, 106 97, C04B 702

Patent

active

043505333

ABSTRACT:
A rapid reaction of high alumina cement, gypsum, lime and water produces cementitious compositions in which the only significant factor contributing to strength during the very early stages of hydration (i.e., a few minutes to a few hours) is the formation of an amount of ettringite equal to from about 40% to about 60% of the weight the paste of water, the high alumina cement, the gypsum source, and the lime source. A substantially impermeable concrete having a 4-hour compressive strength of about 8000 p.s.i. may be produced from the cement powder of this invention.

REFERENCES:
patent: 3775143 (1973-11-01), Mikhailov et al.
patent: 3861929 (1975-01-01), Deets et al.
patent: 3922172 (1975-11-01), Crinkelmeyer et al.
patent: 4045237 (1977-08-01), Gaines et al.
patent: 4157263 (1979-06-01), Gaines et al.
patent: 4216022 (1980-08-01), Wilson

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