Method of preparation of a solid setting accelerant product, product obtained and use thereof

摘要

Method of preparation of a solid accelerant product for setting in the solid state, free of alkaline metals and chlorides, easily soluble in water at room temperature in order to provide solutions with a high concentration in Al 2 O 3 ; said solutions being able to be used as liquid setting accelerants for the hardening of cement mixtures (mortar and concrete) ensuring a rapid development of compressive strength at early ages.
The solid setting accelerant contains a polyanionic aluminium complex of formula [Al(OH) a (SO 4 ) b X c (H 2 O) d ] where a = 1-3; b = 0-1, c = 0-0.5, d = 0-4 and X = DEA, TEA.