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Title:
REINFORCED CONCRETE PIPE AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPH08277993
Kind Code:
A
Abstract:

PURPOSE: To provide a reinforced concrete pipe and a manufacturing method for it in which a resin film on a pipe inside face is prevented from breaking, splitting, or peeling off from the pipe inside face even when a crack and the like is generated.

CONSTITUTION: In a reinforced concrete pipe, a pipe inside face is coated with a resin film 3 formed by heating and melting short fibers or scale pieces of thermoplastic resin, a part of the short fibers or the scale pieces are embedded in a pipe wall 2. In a manufacturing method, in which concrete fed to the inside of a molding die is hardened along the inside face of the molding die by means of centrifugal force while the cylindrical molding die is rotated at a high speed, for the reinforced concrete pipe the short fibers or the scale pieces are fed into the inside of the molding die so as to be laminated on the inside face of the concrete by means of centrifugal force before the concrete along the inside face of the molding die is hardened, and the short fibers or the scale pieces are heated and melted so as to be formed into the coating film 3.


Inventors:
OTAKI SHIGETOSHI
Application Number:
JP9982895A
Publication Date:
October 22, 1996
Filing Date:
March 31, 1995
Export Citation:
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Assignee:
TAKIRON CO
International Classes:
E03F3/04; F16L58/10; (IPC1-7): F16L58/10; E03F3/04
Attorney, Agent or Firm:
中井 宏行



 
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