Hydraulic binder comprising a ternary acceleration system...

Details Hydraulic binder comprising a ternary acceleration system... Hydraulic binder comprising a ternary acceleration system...

2006-09-27

2011-12-13

Lorengo, Jerry A (Department: 1731)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S715000, C106S670000, C106S701000, C106S602000, C106S767000

Reexamination Certificate

active

08075687

ABSTRACT:
A hydraulic binder based on slag cement, the slag cement including 20 to 80 weight % relative to a total weight of slag cement, of a blast furnace slag or a mixture of blast furnace slags, relative to the total weight of the slag cement, the hydraulic binder including an acceleration additive that is a ternary system including at least one alkali metal hydroxide in an amount such that, during mixing with water of the hydraulic binder, a molar concentration of the alkali metal hydroxide in the water is from 0.05N to 0.60N, preferably from 0.20N to 0.40N; an alkali metal sulfate at a rate of from 0.2 to 3 weight % of the slag cement; and a source of calcium sulfate in such a proportion that the content of calcium sulfate (CaSO4), relative to the weight of the slag cement, is from 2 to 7%.

REFERENCES:
patent: 4715896 (1987-12-01), Berry
patent: 5580379 (1996-12-01), Cowan
patent: 6409819 (2002-06-01), Ko
patent: 6793851 (2004-09-01), Bompay et al.
patent: 2004/0231569 (2004-11-01), Stroup et al.
patent: WO 91/19687 (1991-12-01), None
PCT Written Opinion of the International Search Authority mailed Apr. 17, 2008.

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