PROCESS FOR PREPARING EXPANSION COMPONENT OF EXPANDING CEMENTS BASED ON 3CaO. 3Al2O3. CaSO4 COMPOUND FROM AMMONIA ALUM

PROCESS FOR PREPARING EXPANSION COMPONENT OF EXPANDING CEMENTS BASED ON 3CaO. 3Al2O3. CaSO4 COMPOUND FROM AMMONIA ALUM

The invented process for preparing expansion component of high-expansion cements based on the compound of the general formula {3CaO.3Ali2Oi3.CaSOi4} from ammonia alum is characterized in that ammonia alum is mixed with either calcium carbonate and/or oxide in molar ratio of CaO : Ali2Oi3 being equal...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MATOUSEK PAVEL, BRANDSTILLEROVA MARIE, SAUMAN ZDENEK DRSC, NOVAK PETR
Format: Patent
Sprache:cze ; eng
Schlagworte:
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:The invented process for preparing expansion component of high-expansion cements based on the compound of the general formula {3CaO.3Ali2Oi3.CaSOi4} from ammonia alum is characterized in that ammonia alum is mixed with either calcium carbonate and/or oxide in molar ratio of CaO : Ali2Oi3 being equal to 3 : 3 to 5 : 3 and the obtained mixture of raw materials is ground, homogenized, optionally granulated and subsequently heat treated at temperatures ranging from 1150 to 1350 degC, whereupon the resulting product is ground so that its specific surface is at least 300 square meters per one kilogram.