Method of making a plastic lined concrete structure
AssigneeWilbert, Inc.
InventorMichael Davidian
Life of this patent
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Abstract
A method of making a concrete structure, such as a burial vault, having an integrally bonded thermoplastic resin liner. The liner is a rigid molded product having a bottom wall and side walls and an open top. A thermosetting resin adhesive is applied to the outer surface of the liner and consists of an epoxy resin system, a solvent for the thermoplastic liner, and a surfactant. Before the adhesive is fully cured, wet flowable concrete is applied to the adhesive layer. The solvent acts to solubilize the outer surface of the plastic liner, while the surfactant reduces the hydrophobic characteristics of the adhesive to provide a firmly bonded composite structure.
Claims6
A method of producing a plastic lined concrete structure, comprising the steps of molding a rigid thermoplastic liner, applying a thermosetting resin adhesive to a surface of said liner, said adhesive comprising an epoxy resin system, a solvent compatible with said epoxy resin system and capable of solubilizing the outer surface of said liner, and a surfactant capable of emulsifying said epoxy resin system and said solvent, applying wet flowable concrete to said adhesive layer, and curing said adhesive and said concrete to provide a composite structure in which the concrete is firmly bonded to the liner, said surfactant acting to reduce the hydrophobic characteristics of said adhesive to provide an improved bond between said concrete and said liner.
Dependencies are inferred from the claim text.