A composite wall and cylindrical and its process of building wall for construction and installation construction of underground drainage pipe of low and high rush

摘要

A fluid retaining wall or pipe particularly suitable for underground installation having a reinforced thermosetting resin construction. The wall of the pipe consists essentially of a thermosetting resin matrix, chopped glass fibers and a pulverulent filler such as sand distributed through out the matrix and filament wound, continuous glass fibers within the resin matrix, preferably distributed primarily adjacent the interior and exterior surfaces of the cylindical wall. The disclosed method includes applying the resin matrix in a liquid form to a continuously rotating cylindrical form, distributing the sand and chopped glass fibers within the matrix, winding the glass filaments helically in the matrix, and heating the pipe to cure the matrix.