Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Uniting preform member with molding material
Patent
1991-11-13
1993-09-21
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Uniting preform member with molding material
138 97, 156 94, 264 36, 264 82, 264232, 264233, 264269, 264309, 264312, 264333, 264DIG43, 405154, 427142, 427236, 4273978, 427427, B32B 3500, C04B 4000, E04B 116
Patent
active
052466418
ABSTRACT:
An improved method for lining a section of pipe with a cement mortar. After a wet cement mortar has been applied to a cleaned interior surface of a pipe, carbon dioxide is introduced into the freshly lined section of the pipe in such quantity that a crust of calcium carbonate will be formed on the surface of the wet cement mortar lining as the carbon dioxide reacts with calcium compounds of the wet cement mortar in a relatively short period of time. This crust is provided to tolerate a low-velocity flow of water to protect the underlying mortar from scouring until the normal hardening of the underlying mortar through hydration can take place so as to substantially reduce the out-of-service time of the section of pipe which is being lined.
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Perkins Alfred G.
Perkins Craig R.
Aftergut Karen
Mainlining Service, Inc.
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