Patent ID: 7794688

Claim:
A method for forming a cementitious composition, the method comprising providing a first volume of a magnesium chloride (MgCl 2 ) 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 MgCl 2 , MgO, and H 2 O to preferably form a magnesium oxychloride cement composition according to the 5 phase reaction: 5MgO+MgCl 2 +13H 2 O→5Mg(OH) 2 .MgCl 2 .8H 2 O; and mixing the first volume with the second volume to form the magnesium oxychloride cement composition.