Cast-in-place manhole liner method

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

1563084, 1563096, 264 32, 264 35, 264 36, 264262, 264269, 264274, 264279, 2642791, B32B 3106, B32B 3120, B32B 3500, E04B 116

Patent

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050321978

ABSTRACT:
The present method includes casting a poured concrete liner in an existing manhole with a protective acid resistant plastic material covering the interior surface of the newly poured concrete liner. A plurality of arcuate form panels are assembled into a circular form spaced radially inwardly from the existing manhole wall so as to create an annular space therebetween. Plastic sheeting is then fitted around the outside of the form with protrusions extending outwardly from the plastic surface into the annular space. Concrete is poured into the annular space and surrounds the plastic protrusions to bind the plastic sheeting thereto. The forms are removed after curing of the concrete, thereby leaving the plastic liner on the inside wall of the newly poured concrete.

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"Action Products", sales flyer, Action Products Co., 1985, pp. 1-4.
"No Sewer Protected by T-Lock Has Ever Failed Because of Corrosion!", Ameron brochure, dated 1959.

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