Cementitious compositions

Details Cementitious compositions Cementitious compositions

C - Chemistry, Metallurgy

04

B

261/45

C04B 7/00 (2006.01) C04B 24/26 (2006.01)

Patent

CA 1111160

ABSTRACT High Strength Cementitious Compositions In Canadian Patent Application 264,611 we have described cured polymer-containing cementitious compositions of high modulus of rupture. The cured compositions are made by curing the product of subjecting to a homogenisation process comprising high shear mixing (e.g. extrusion or calendering) the ingredients hydraulic cement, water and a selected water-dispersible polymer. The polymer is selected by a test which determines thermally its effect on the cement hydration reaction. The present invention describes the use in similar compositions of a class of water-dispersible acidic polymer, not selected by the above-mentioned test, which contains a specified proportion of carboxyl groups. Shaped products comprised of the new cured compos- itions of high modulus of rupture are useful, for example, in building applications where previously it was necessary to employ asbestos in admixture with the cement.

322063

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