METHOD FOR PRODUCING AN ANHYDRITE III OR .ALPHA. BASED HYDRAULIC BONDING AGENT

摘要

Synthesis process a hydraulic binder to calcium sulphate base natural (gypsum) to heat the calcium sulfate to obtain in a large proportion anhydrite III or .alpha. then to perform a thermal tempering. he consists of: completely dehydrating the calcium sulphate, and cooling brutally the matter thus dehydrated. The present invention finds a preferential application in the building industry in obtaining a hydraulic binder acting as cement.