Magnesium oxychloride cement
AssigneeMaya Magstone, Inc.
InventorsGeorge Eccles Caine, Charles W. Ellis
Life of this patent
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Abstract
Magnesium oxychloride cement is formed by mixing a magnesium chloride (MgCl2) brine solution with a magnesium oxide (MgO) composition in a selected stoichiometric ratio of MgCl2, MgO, and H2O that forms the 5 phase magnesium oxychloride cement composition. Although Sorel cements formed from the mixture of MgCl2, MgO can form a variety of compounds, the inventive systems and methods provide for controlling the cement kinetics to form the five phase magnesium oxychloride cement composition and results in an improved and stable cement composition. Various fillers can be optionally added to form preferred cement materials for uses as diverse such as road stripping, fire-proofing, fire barriers, cement repair, and mortar.
Claims20
A method for forming a cementitious composition, the method comprising
- providing a first volume of a magnesium chloride (MgCl2) brine solution, the brine solution having a specific gravity in the range from about 27° Baume to about 34° Baume;
- and
- providing a second volume of a magnesium oxide (MgO) composition, the second volume and the first volume having a weight ratio that is based upon their respective concentrations and is selected to provide sufficiently stoichiometric ratios of MgCl2, MgO, and H2O to preferably form a magnesium oxychloride cement composition according to the 5 phase reaction:
- 5MgO+MgCl2+13H2O→5Mg(OH)2.MgCl2.8H2O;
- and
- mixing the first volume with the second volume to form the magnesium oxychloride cement composition.
A method for forming a cementitious composition, the method comprising
- providing a first volume of a magnesium chloride (MgCl2) brine solution;
- and
- providing a second volume of a magnesium oxide (MgO) composition, the second volume and the first volume having a weight ratio that is based upon their respective concentrations and is selected to provide sufficiently stoichiometric ratios of MgCl2, MgO, and H2O to preferably form a magnesium oxychloride cement composition comprising at least about 80% of the 5 phase compound:
- 5MgO+MgCl2+13H2O→5Mg(OH)2.MgCl2.8H2O;
- and
- providing one or more fillers.
A method for forming a cementitious composition, the method comprising
- providing a first volume of a magnesium chloride (MgCl2) brine solution;
- and
- providing a second volume of a magnesium oxide (MgO) composition, the second volume and the first volume having a weight ratio that is based upon their respective concentrations and is selected to provide sufficiently stoichiometric ratios of MgCl2, MgO, and H2O to preferably form a magnesium oxychloride cement composition according to the 5 phase reaction:
- 5MgO+MgCl2+13H2O→5Mg(OH)2.MgCl2.8H2O;
- and
- mixing the first volume with the second volume from about one minute to about seven minutes to form the magnesium oxychloride cement composition.
Dependencies are inferred from the claim text.