Process for rehabilitation of sewer collection system structures

Details Process for rehabilitation of sewer collection system structures Process for rehabilitation of sewer collection system structures

1993-10-12

1996-07-23

Bell, Janyce

Coating processes

Restoring or repairing

427230, 427299, 427301, 4274071, 4274193, B32B 3500

Patent

active

055387551

ABSTRACT:
A method for rehabilitating manholes and other sewer collection system structures begins by repairing existing leaks using hydraulic grout and cleaning the interior surface of the manhole by sandblasting or the like. A waterproofing stage is applied in multiple coats using a crystallization agent that integrates a crystalline structure with the underlying substrate. A chemical attack resistant calcium aluminate cement stage is then applied, and the waterproofing capabilities of the underlying coating are enhanced by the integration of the crystalline structure with the calcium aluminate cement stage. An epoxy coating is applied on the calcium aluminate cement to provide further chemical resistance and waterproofing while simultaneously providing a continuous, bridging barrier during self-repair of cracks in the underlying calcium aluminate by expanding crystallization by the crystallization agent.

REFERENCES:
patent: 3653951 (1972-04-01), Maldeis et al.
patent: 5108790 (1992-04-01), Bubock
patent: 5286425 (1994-02-01), Bubock et al.

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