Rapid setting, high early strength binders
AssigneeMBT Holding AG
InventorStephen A. Farrington
Life of this patent
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Abstract
A method for making a cementitious material comprises forming a mixture of water and active ingredients consisting essentially of i) a compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound and iii) optionally an additional phosphate source; wherein forming said mixture is substantially in the absence of ammonia or an ammonium ion containing compound. A method for repairing a flaw in a cementitious structure comprises applying to the flaw the cementitious binder thus prepared.
Claims32
A method for making a cementitious material comprising:
- forming a mixture of water and active ingredients consisting essentially of i) a magnesium compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound capable of providing phosphorous pentoxide, wherein the weight ratio of the magnesium compound to the phosphorous pentoxide from the potassium phosphate compound is from about 0.25 to less than 1, iii) optionally an additional phosphate source;
- and iv) optionally a retarder;
- wherein forming said mixture is in the absence of ammonia or an ammonium ion containing compound.
A method for repairing a flaw in a cementitious structure, comprising applying to the flaw a mortar prepared by forming a mixture of an inert filler, water and active ingredients consisting essentially of i) a magnesium compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound capable of providing phosphorous pentoxide, wherein the weight ratio of the magnesium compound to the phosphorous pentoxide from the potassium phosphate compound is from about 0.25 to less than 1, iii) optionally an additional phosphate source;
- and iv) optionally a retarder;
- wherein forming said mixture is in the absence of ammonia or an ammonium ion containing compound.
A method for repairing a flaw in a cementitious structure, comprising applying to the flaw a cementitious binder prepared by forming a mixture of water and active ingredients consisting essentially of i) a magnesium compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound capable of providing phosphorous pentoxide, wherein the weight ratio of the magnesium compound to the phosphorous pentoxide from the potassium phosphate compound is from about 0.25 to less than 1, iii) optionally an additional phosphate source;
- and iv) optionally a retarder;
- wherein forming said mixture is in the absence of ammonia or an ammonium ion containing compound.
A cementitious composition formulation comprising active ingredients to which water is to be added consisting essentially of i) a magnesium compound capable of providing, in aqueous solution, magnesium ions, ii) a potassium phosphate compound capable of providing phosphorous pentoxide, wherein the weight ratio of the magnesium compound to the phosphorous pentoxide from the potassium phosphate compound is from about 0.25 to less than 1, iii) optionally an additional phosphate source;
- and iv) optionally a retarder;
- wherein said formulation does not contain ammonia or an ammonium ion containing compound and;
- wherein the active ingredients are present in an amount of about 10 to about 15 parts by weight of the magnesium ion providing compound, about 30 to about 60 parts by weight of the potassium phosphate compound, and up to about 20 parts by weight of the additional phosphate source.
Dependencies are inferred from the claim text.