Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
VERFAHREN ZUR HERSTELLUNG EINES SPRITZBETONBESCHLEUNIGERS MIT NEUEN ROHSTOFFEN
The invention relates to a method for producing a gunned-concrete accelerator from a mixture a), b), or c), which method comprises mixing a) at least one aluminum compound selected from an aluminum sulfate and/or an aluminum hydroxy sulfate, at least one calcium compound, and optionally water, or b) at least one aluminum compound selected from aluminum sulfate and/or aluminum hydroxy sulfate, at least one alkali aluminate, and optionally water, wherein the alkali content of the mixture is at most 10 mass% Na2O equivalent, preferably at most 5 mass% Na2O equivalent, preferably at most 2 mass% Na2O equivalent, or c) concentrated sulfuric acid and aluminum hydroxide, preferably crystalline aluminum hydroxide, wherein the sulfuric acid is present in stoichiometric deficit and the mixture is reacted at a temperature above 100 °C, preferably under positive pressure, wherein the gunned-concrete accelerator or, if the gunned-concrete accelerator is a solid gunned-concrete accelerator, a mixture of the solid gunned-concrete accelerator in water has a pH value less than 4. The mixtures a), b), and c) are suitable as an accelerator for cement suspensions, gunned concrete, or sprayed mortar.
VERFAHREN ZUR HERSTELLUNG EINES SPRITZBETONBESCHLEUNIGERS MIT NEUEN ROHSTOFFEN
The invention relates to a method for producing a gunned-concrete accelerator from a mixture a), b), or c), which method comprises mixing a) at least one aluminum compound selected from an aluminum sulfate and/or an aluminum hydroxy sulfate, at least one calcium compound, and optionally water, or b) at least one aluminum compound selected from aluminum sulfate and/or aluminum hydroxy sulfate, at least one alkali aluminate, and optionally water, wherein the alkali content of the mixture is at most 10 mass% Na2O equivalent, preferably at most 5 mass% Na2O equivalent, preferably at most 2 mass% Na2O equivalent, or c) concentrated sulfuric acid and aluminum hydroxide, preferably crystalline aluminum hydroxide, wherein the sulfuric acid is present in stoichiometric deficit and the mixture is reacted at a temperature above 100 °C, preferably under positive pressure, wherein the gunned-concrete accelerator or, if the gunned-concrete accelerator is a solid gunned-concrete accelerator, a mixture of the solid gunned-concrete accelerator in water has a pH value less than 4. The mixtures a), b), and c) are suitable as an accelerator for cement suspensions, gunned concrete, or sprayed mortar.
VERFAHREN ZUR HERSTELLUNG EINES SPRITZBETONBESCHLEUNIGERS MIT NEUEN ROHSTOFFEN
METHOD FOR PRODUCING A SHOTCRETE ACCELERATOR WITH NEW RAW MATERIALS
PROCÉDÉ DE FABRICATION D'UN ACCÉLÉRATEUR DE BÉTON PROJETÉ À L'AIDE DE NOUVELLES MATIÈRES PREMIÈRES
WEIBEL MARTIN (Autor:in) / LINDLAR BENEDIKT (Autor:in) / STENGER CHRISTIAN (Autor:in)
18.12.2019
Patent
Elektronische Ressource
Deutsch
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