Flexible cementitious coatings
AssigneeAstro-Steel Grip International, Inc.
InventorRobert B. Heiman
Life of this patent
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Abstract
A repair overlay for masonry surfaces includes three layers each containing epoxy resins which contribute to bonding to the adjacent layers. The underlayer is a coating of epoxy adhesive. The layer that overlies the underlayer includes Portland cement and epoxy, acrylic and vinyl polymers and, in some forms, a flexible metal mesh or screen. The overlayer consists of an epoxy paint and, in preferred form, a second thinner layer of cementitious polymer bearing material.
Claims19
A flexible cementitious overlayer for installation over the unsealed surface of a base material comprising, in combination:
- a hardened underlayer of adhesive of a kind to which a combination of Portland cement and polymeric resin will adhere and which has the quality of penetrating and bonding to unsealed base material surfaces;
- a layer of hardened cementitious material comprising a mixture of polymeric resins and hydrolyzed Portland cement overlying and bonded to said underlayer of adhesive;
- and
- an overlayer of epoxy adhesive paint overlying said layer of hardened cementitious material.
The method of repairing concrete surfaces which method comprises the steps of:
- (a) coating the surface of the concrete to be repaired with a thin layer of adhesive containing an epoxy resin thinned with solvants to permit penetration into any cracks and interstices opening to the surface of the concrete to be repaired;
- (b) allowing the adhesive layer to dry by evaporation of the solvent;
- (c) applying over said adhesive layer a flexible cementitious layer formed of trowellable mixture of water, Portland cement and an emulsion of resins including epoxy and acrylic resins;
- and
- (d) sealing said cementitious layer with a sealing coating of epoxy adhesive.
In an overlay for masonry and stone surfaces:
- an adhesive layer in the form of a thin layer of epoxy based adhesive;
- a cementitious layer overlying and bonded to one side of the adhesive layer and consisting of Portland cement and polymeric materials including both epoxy and acrylic resins;
- and
- an overlayer containing an epoxy adhesive material bonded to and overlying said cementitious layer.
Dependencies are inferred from the claim text.