Concrete products and methods of fabrication

Details Concrete products and methods of fabrication Concrete products and methods of fabrication

1992-02-21

1993-12-21

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

52 21, 521697, 5230917, 52414, 52431, 52432, 52515, 52245, 52249, E02D 2912

Patent

active

052711935

ABSTRACT:
An internal form with exterior surfaces corresponding to the interior surfaces of the access chamber adapted to be contacted by corrosive gasses; spraying such exterior surfaces of the form with a release agent and allowing the release agent to cure; spraying the cured release agent with a first layer of gel coat having a first color and allowing the gel coat to cure; spraying the cured first layer of gel coat with a second layer of gel coat having a second color contrasting to the first color and allowing the second layer of gel coat to cure; spraying the cured second layer of gel coat with resin and chopped strands to form a first fiberglass coating; attaching half cylinder pockets to the first fiberglass coating; spraying the first fiberglass coating and pockets with resin and chopped strands to form a second fiberglass coating; rolling the second fiberglass coating to remove air bubbles and to improve the bonding between the layers and coatings; laying up metal reinforcing rods interior of the pockets and spaced from the coating; positioning a wire mesh exterior of the pockets and attaching the rods to the mesh; positioning a jacket as an external form over the internal form; pouring concrete between the internal and external form and into and through the pockets; and removing the forms from the concrete to thereby provide the access chamber component.

REFERENCES:
patent: 1463621 (1923-07-01), Lichtenberg et al.
patent: 3745738 (1973-07-01), Singer
patent: 4751799 (1988-06-01), Ditcher et al.

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