High compressive strength polymer grout and method of making

A three-part epoxy grout composition comprising:

• a liquid epoxy blend comprising a material selected from the group consisting of:
• diglycidyl ether epoxy resins of bisphenol A, bisphenol F, bisphenol E, bisphenol S, novolacs, and reactive diluents including aliphatic and aromatic mono-, di-, and tri-glycidyl ethers thereof;
• a liquid hardener comprising a material selected from the group consisting of:
• cyclohexanemethanamine, 5-amino-1,3,3-trimethyl, any cycloaliphatic mono-, di-, and tri-amine, isophoronediamine (IPDA), aliphatic amines, and aromatic amines;
• and,
• a graded particulate aggregate comprising sand and fine filler, wherein said aggregate particles are pretreated with an adhesion promoter in an amount of 0.01 to 5% by weight, wherein the adhesion promoter is selected from the group consisting of:
• amino functional silanes, glycidoxy functionalized silanes, (meth)acrylic functionalized silanes, and other reactive functionalized silanes, and,
• the volume of said pretreated aggregate particles, when mixed with said epoxy blend and said hardener, forming a cured grout, comprises at least 70% by volume of the cured grout, wherein the grout composition is characterized by the following properties in the fully cured state:
• a compressive strength of at least 19,000 psi, a coefficient of thermal expansion of no more than 14 μstrain/° F., and an elastic modulus of at least 24 GPa.