Cementitious composition
AssigneeBASF SE
InventorsHarald GRASSL, Joachim DENGLER, Marita SPIERLING
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Abstract
The present application relates to a cementitious composition suitable to be applied to an object via a nozzle. The composition comprises a) 15-90% by weight of a cementitious binder, b) 0.02-3% by weight of an ettringite formation controller, c) 0.15-10% by weight of a magnesium salt accelerator and d) 0.02-2% by weight of a polyhydroxy compound A, and/or salts or esters thereof, wherein the polyhydroxy compound A is selected from polyalcohols with a carbon to oxygen ratio of C/O≥1 and mixtures 0 thereof, based on the total dry weight of the composition. Further a process for applying the composition onto a surface and a hardened structure obtained by the process is disclosed.
Claims16
-15. (canceled)
A composition suitable to be applied to an object via a nozzle comprising, based on the total dry weight of the composition,
- a) 15-90% by weight of a cementitious binder;
- b) 0.02-3% by weight of an ettringite formation controller comprising
- (i) a glyoxylic acid condensate and/or a glyoxylic acid adduct and/or glyoxylic acid;
- c) 0.15-10% by weight of a magnesium salt accelerator;
- d) 0.02-2% by weight of a polyhydroxy compound A and/or salts or esters thereof, wherein the polyhydroxy compound A is selected from polyalcohols with a carbon to oxygen ratio of C/O≥1 and mixtures thereof.
A process comprising
- providing a composition comprising a) 15-90 by weight of a cementitious binder;
- b) 0.02 3% by weight of an ettringite formation controller comprising (i) a glyoxylic acid condensate and/or a glyoxylic acid adduct and/or glyoxylic acid;
- d) 0.02-2% by weight of a polyhydroxy compound A and/or salts or esters thereof, wherein the polyhydroxy compound A is selected from polyalcohols with a carbon to oxygen ratio of C/O≥1 and mixtures thereof,
- admixing an c) 0.15-10% by weight of a magnesium salt accelerator;
- and
- applying the composition onto a surface to obtain a structure and allowing the structure to harden;
- wherein the % by weight are based on the total dry weight of the composition.
Dependencies are inferred from the claim text.