TEMPERATURE-STABLE LIQUID AQUEOUS POLYSACCHARIDE SUSPENSIONS AND USE THEREOF AS THICKENING AGENTS IN CEMENTITIOUS COMPOSITIONS

摘要

The invention relates to a liquid aqueous suspension of polysaccharide, containing a mass concentration of at least one polysaccharide of between 15 and 35 % in the form of partially hydrated particles dispersed in an aqueous solution of a strong base salt, excluding ammonium salts, with an ionic strength of between 1.25 mol/L and 15 mol/L, having a pH greater than 9 and containing at least one non-phyllitic crystalline mineral powder, referred to hereafter as filler, which is chemically inert in said aqueous suspension and which has a grain size of between 0.1 and 100 micrometres and an attapulgite in micronised form, said aqueous suspension being stable at least in a temperature range from 5 to 30 30 °C. The invention is suitable for use as an agent for thickening cementitious compositions.