| abstract |
A HYDRAULIC CEMENT COMPOSITION COMPRISES (A) THE CLINKER CONTAINING 5-60% BY WEIGHT OF 11 CAO. 7AL2O3. CAX2 SP (X REPRESENTS HALOGEN ATOM), MORE THAN 5% BY WEIGHT OF 3CAO.SIO2 SOLID SOLUTION, AND FURTHER 2CAO.SIO2 SOLID SOLUTION AND 4CAO. AL2O3.FE2O3 (4CAO.AL2O3.FE2O3 REPRESENTS 2CAO.FE2O3.6CAO.2AL2O3.FE2O3 SYSTEM SOLID SOLUTION); (B) ANHYDRITE WITH OR WITHOUT HEMIHYDRATE AND (C) AT LEAST ONE OF SULFATES, NITRATES AND CHLORIDES OF POTASSIUM, SODIUM, MAGNESIUM, CALCIUM, ALUMINUM OR AMMONIUM (EXCEPTING CASO4.2H2O, CASO4 AND CASO4.1/2H2O), WHEREBY THE ANHYDRITE IS CONTAINED IN AN AMOUNT THAT AL203/SO3 WEIGHT RATIO OF AL2O3 IN THE CLINKER AND SO3 IN THE ANHYDRITE IS 0.7-1.8 AND HEMIHYDRATE GYPSUM IS CONTAINED LESS THAN 5% BY WEIGHT AS SO3. |