Mixture, in particular construction material mixture containing furnace slag
AssigneeConstruction Research & Technology GmbH
InventorsFlorian Ellenrieder, Katja Voland, Uwe Gehrig, Samuele Beraldo, Joachim Riedmiller
Life of this patent
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Abstract
The present invention relates to building material mixtures which contain slag sand and zinc salts which have from 0 to 8 carbon atoms in their structure. The invention furthermore relates to the use of zinc salts for preventing discolorations during the hardening of the building material mixtures.
Claims13
A building material binder system containing between 5 and 50% by weight slag sand as a first binder, and between 1 and 70% by weight microsilica and/or between 5 and 90% by weight metakaolin as a second binder, wherein the binder system contains between 0.001 and 10% by weight of a zinc salt, the zinc salt having from 0 to 8 carbon atoms, and between 5 and 50% by weight of an activator comprising at least one alkali metal compound, wherein the percentages are based on the total weight of the binder system.
A method comprising introducing in a building material binder system based on slag sand:
- (i) between 0.001 and 10% by weight of a zinc salt for preventing discolorations;
- (ii) between 1 and 70% by weight microsilica and/or between 5 and 90% by weight metakaolin as a second binder;
- and (iii) between 5 and 50% by weight of an activator comprising at least one alkali metal compound;
- wherein the building material binder system comprises between 5 and 50% by weight slag sand and wherein the percentages by weight are based on the total weight of the binder system.
Dependencies are inferred from the claim text.