High strength cement, mortar and concrete including...

Details High strength cement, mortar and concrete including... High strength cement, mortar and concrete including...

C - Chemistry, Metallurgy

04

B

C04B 18/06 (2006.01) C04B 14/00 (2006.01)

Patent

CA 2675750

Cementitious compositions in which the cementitious properties of fly-ash are carefully controlled. The cementitious compositions may be substantially free harsh acids and bases such as citric acids (~ pH 2.2) and alkali metal activators including alkali hydroxides (~ pH 12-14) and metal carbonates (~ pH 11.6). The use of these harsh chemicals creates acid base reactions during use of the products. Instead of these harsh chemicals, a citric salt, for example potassium citrate, may be used as a reaction accelerator. Boric compounds may be used as a retarder in the compositions.

La présente invention concerne des compositions cimentaires dans lesquelles des propriétés cimentaires de cendres volantes sont soigneusement contrôlées. Les compositions cimentaires peuvent être sensiblement exemptes d'acides et de bases durs tels que des acides citriques (~ pH 2,2) et des activateurs de métal alcalin comprenant des hydroxydes alcalins (~ pH 12-14) et des carbonates métalliques (~ pH 11,6). L'utilisation de ces produits chimiques durs crée des réactions de base acide lors de la production des produits. Au lieu de ces produits chimiques durs, un sel d'acide citrique, par exemple, du citrate de potassium, peut être utilisé en tant qu'accélérateur de réaction. Des composés boriques peuvent être utilisés comme retardateurs dans les compositions.

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