ACCELERATING COMPOSITIONS FOR THE HYDRAULIC SETTING OF ANHYDRITE, AND PROCESSES FOR THEIR USE

摘要

1. Process for speeding up the hydraulic setting of anhydrite characterized in that the anhydrite and water mixture is produced in the presence of at least one substance causing the formation of sulphate ions, at least one substance causing the formation of potassium ions, at least one substance causing the formation of bivalent iron ions, and at least one substance having, towards said bivalent iron ions, a power of oxidation into trivalent iron ions, said substance with oxidizing power being selected from nitrate, chlorate, hypochlorite, and peroxosalts, the different selected substances promoting the formation of jarosite.