Patent ID: 8685158

Claim:
A water retention agent for a cementitious composition, comprising a liquid aqueous suspension of: at least one polysaccharide at a concentration by weight of between 15% and 30%, in an aqueous solution of a strong base salt, with the exception of ammonium salts, having an ionic strength of between 1.25 mol/l and 15 mol/l, and a pH of greater than 9, micronized attapulgite, and filler comprising at least one nonphyllitic mineral powder, the content by weight of said filler being between 0.1% and 5% of said aqueous suspension, wherein the micronized attapulgite and filler are chemically inert in said aqueous suspension, have a particle size of between 0.1 and 100 micrometers, and confer stability on said aqueous suspension within a temperature range of at least 5Â° C. to 30Â° C.