Hydrated calcium aluminate based expansive admixture

Details Hydrated calcium aluminate based expansive admixture Hydrated calcium aluminate based expansive admixture

C - Chemistry, Metallurgy

01

F

C01F 7/16 (2006.01) C04B 22/00 (2006.01) C04B 28/02 (2006.01)

Patent

CA 2298328

An additive, a mixture incorporating the additive and a method of formulating a mortar incorporating the additive. The additive is based on calcium sulfoaluminate composed of C3AH6 and CAH10 where C = calcium oxide, A = aluminum oxide and H = water. The admixture includes gypsum and calcium hydroxide. The calcium aluminum hydrates are obtained by hydration of high alumina cement particles to eliminate any lack of hydration in the core of the particle. The method involves the preparation of such particles and the mix incorporates the particles to produce a homogeneously hydrated cement additive.

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