Additives for special gypsum - and mortar locations, compositions containing these and use thereof in special gypsum - and mortar locations

摘要

The invention relates to a water retaining additive for agglomerating construction materials which is free of cellulose derivatives and comprises at least one rheologic grade clay, preferably sepiolite, and a natural modified gum such as guar gum, as well as agglomerating compositions which contain the additive; the invention also relates to the use of the additive for various construction materials based on special mortars and plasters.