Alkali-free, alkaline metal-free, and chloride-free setting and hardening accelerator for hydraulic binders

An alkali-free, alkaline meta-free and chloride-free setting and hardening accelerator for hydraulic binders comprising at least one water soluble fluoride comprising aluminum salt and at least one water soluble sulfate comprising aluminum salt. A method for the production of such an accelerator des...

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Bibliographische Detailangaben
Hauptverfasser:	BURGE, THEODOR A, SOMMER, MARCEL, WOMBACHER, FRANZ
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BUILDING BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE EARTH DRILLING FIXED CONSTRUCTIONS FORMS GALLERIES HANDLING BUILDING MATERIALS ON THE SITE LARGE UNDERGROUND CHAMBERS LIME, MAGNESIA METALLURGY MINING REFRACTORIES REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS SCAFFOLDING SHAFTS SHUTTERING SLAG TREATMENT OF NATURAL STONE TUNNELS
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Beschreibung
Zusammenfassung:	An alkali-free, alkaline meta-free and chloride-free setting and hardening accelerator for hydraulic binders comprising at least one water soluble fluoride comprising aluminum salt and at least one water soluble sulfate comprising aluminum salt. A method for the production of such an accelerator described herein, where the water soluble fluoride comprising aluminum salt is produced by combining an aluminum compound such as amorphous aluminum hydroxide, crystalline aluminum hydroxide, aluminum oxide or mixtures thereof with hydrofluoric acid, optionally at enhanced temperature, prior to the blending with other components and then optionally drying.