CEMENTING COMPOSITION AND A METHOD OF APPLICATION THEREOF Russian patent published in 2005 - IPC

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to a settable composition, which can be sprayed to form coating on a surface, in particular on well walls, and which comprises: (I) cementing composition including following components: (i) 25-95% calcium aluminate, (ii) 0-10% lime, and (iii) 0-50% calcium sulfate, wherein summary content of (ii) and (iii) amounts to at least 5% of the total weight of (i)-(iii) and proportions of components are such that, when subjected to hydration, composition is capable to absorb water in amount equal to at least its own mass; and (II) water emulsion of organic polymer, weight ratio of (II) to (I) being such as to provide relation of dry polymer weight to summary weight of (i)-(iii) from 0.5:1 to 10:1, preferably from 1:1 to 2.5:1; or (III) dispersible organic polymer in amount providing weight ratio of this polymer to sum (i)-(iii) from 0.5:1 to 10:1, preferably from 1:1 to 2.5:1. Dry composition including (I) and (III) ingredients can be mixed with water in well.

EFFECT: expanded application possibilities.

11 cl, 7 ex