| 摘要 |
THE PRESENT INVENTION RELATES TO A DRY BINDER PREMIX COMPRISING, IN MASS PROPORTIONS: - PORTLAND CLINKER HAVING A BLAINE SPECIFIC SURFACE AREA COMPRISED FROM 4500 TO 9500 CM²/G, PREFERABLY FROM 5500 TO 8000 CM²/G, THE MINIMUM QUANTITY OF THE SAID CLINKER BY MASS PERCENTAGE RELATIVE TO THE TOTAL MASS OF THE PREMIX BEING DETERMINED ACCORDING TO THE FOLLOWING FORMULA (I): [-6.10¯³ x BSSk] + 75 IN WHICH BSSk IS THE BLAINE SPECIFIC SURFACE AREA OF THE CLINKER GIVEN IN CM²/G; -FLY ASH; -AT LEAST ONE ALKALI SULPHATE, THE QUANTITY OF ALKALI SULPHATE BEING SUCH THAT THE QUANTITY OF EQUIVALENT Na?O IN THE PREMIX IS GREATER THAN OR EQUAL TO 5% BY MASS PERCENTAGE RELATIVE TO THE MASS OF FLY ASH; - AT LEAST ONE SOURCE OF SO?, IN A QUANTITY SUCH THAT THE QUANTITY OF SO? IN THE PREMIX IS GREATER THAN OR EQUAL TO 2% BY MASS PERCENTAGE RELATIVE TO THE MASS OF PORTLAND CLINKER; -COMPLEMENTARY MATERIALS HAVING A Dv90 LESS THAN OR EQUAL TO 200 µM SELECTED FROM LIMESTONE POWDERS, CALCINED SHALE, METAKAOLINS, SILICEOUS FILLERS, SILICA POWDERS, POZZOLANS, SLAGS, FLY ASH AND MIXTURES THEREOF; THE QUANTITY OF CLINKER + THE QUANTITY OF FLY ASH BEING GREATER THAN OR EQUAL TO 75%, PREFERABLY 78%, BY MASS PERCENTAGE RELATIVE TO THE TOTAL MASS OF THE PREMIX; THE TOTAL QUANTITY OF CLINKER IN THE PREMIX BEING STRICTLY LESS THAN 60% BY MASS PERCENTAGE RELATIVE TO THE TOTAL MASS OF THE PREMIX. THE INVENTION ALSO RELATES TO A DRY BINDER MIX OBTAINED BY MIXING THE PREVIOUS PREMIX WITH AGGREGATES, AS WELL AS A WET CONCRETE COMPOSITION OBTAINED BY MIXING WITH WATER. |
