Epoxy grouts are mixtures of epoxy resins and a filler material, usually oven
dried sand. These are used when high strength is desired, or when improved
bonding to concrete is necessary. PCI Ref. 20 is a comprehensive report on the
subject by Committee 503 of the American Concrete Institute.The physical
properties of epoxy compounds vary widely. Also, the epoxy grouts behave very
differently than the sand-cement grouts. For example, the thermal expansion of
an epoxy grout can be as much as 7 times the thermal expansion of sand-cement
grout. It is therefore important that use of these grouts be based on experience
and/or appropriate tests. Recommended tests and methods are given in Ref. PCI