METHOD OF MAKING A RAPIDLY HARDENING HYDRAULIC BINDER UPON MIXING WITH WATER

METHOD OF MAKING A RAPIDLY HARDENING HYDRAULIC BINDER UPON MIXING WITH WATER

Method of making a rapidly hardening hydraulic binder for mixing with water, the hardened mass produced therefrom having a defined water resistance. Calcium sulphate alpha -hemihydrate is used as the rapidly hardening component in a predetermined starting quantity, the hardened mass thereof having a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KOSLOWSKI, THOMAS, LUDWIG, UDO, DR, FROEHLICH, ALEXANDER
Format: Patent
Sprache:eng ; ger
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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Zusammenfassung:Method of making a rapidly hardening hydraulic binder for mixing with water, the hardened mass produced therefrom having a defined water resistance. Calcium sulphate alpha -hemihydrate is used as the rapidly hardening component in a predetermined starting quantity, the hardened mass thereof having a time-dependent water resistance curve which, starting from a high initial strength value of the rapid hardening, shows a negative slope in the first twentyeight days. Granulated blast-furnace slag is admixed to the calcium sulphate alpha -hemihydrate. The quantity of granulated blast-furnace slag is matched to the starting quantity of calcium sulphate alpha -hemihydrate in such a way that, after the rapid hardening, formation of crystalline ettringite and formation of calcium hydrosilicate phases occurs and the time-dependent water resistance curve of the hardened mixture shows a constant positive slope in the first twentyeight days.