Patent ID: 6202370
Filing Date: 2001-03-20
Classification: B28B,E03F

Abstract:
A process for forming attachment of a flexible liner to a cementitious wall comprising:(a) the flexible liner comprising a sheet or sealed sections of sheets of a polymer material adapted to form a substantially continuous liquid tight seal against interior cementitious walls of a vault section;(b) a first mold piece having an outer surface generally conforming to the shape of the interior walls of the vault section;(c) a second mold piece having an inner surface generally conforming to the shape of outer walls of the vault section, thereafter effectively joining the first mold piece to the second mold piece such that a mold space is formed therebetween;(d) applying the liner to the outer surface of the first mold piece; and(e) supplying sufficient flowable cementitious material to the mold space whereby the liner forms an attached and substantially continuous liquid tight seal against interior cementitious walls of the vault section thereby formed.