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Title:
METHOD AND FORM FOR MANUFACTURE OF CONCRETE SEGMENT
Document Type and Number:
Japanese Patent JP3779786
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To achieve labor saving in manufacture operation and its simplification by eliminating effectively excess air and excess water from concrete placed by a simple structure by a method wherein highly fluid concrete is casted to be filled inside a manufacturing form from a concrete casting slit, which is cured.
SOLUTION: Highly fluid concrete 20 is gradually filled from both end bottom parts inside a manufacturing form 10 toward a central top end part discharging smoothly air and excess water inside the form 10 and in the highly fluid concrete 20 from a concrete casting slit 15 positioned at a top end part of the manufacturing form 10 and formed over all its width. Further, since a sheet member having gas permeability and water permeability is fitted to an inner surface of an outer peripheral surface form plate 12, a bubble and bleeding water in the highly fluid concrete 20 are forced to be discharged. Air pockmark is prevented as best one can from being generated especially near the top end of a small form inclination, and its finish state can be made good.


Inventors:
Kunio Takeda
Akatsuki Harada
Ikuo Ozawa
Kenta Matsubara
Takaki Tomii
Hirohide Hashimoto
Masayasu Wakabayashi
Ichi Mori
Satoshi Kodama
Application Number:
JP332197A
Publication Date:
May 31, 2006
Filing Date:
January 10, 1997
Export Citation:
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Assignee:
Obayashi Corporation
Ishikawajima Building Materials Industry Co., Ltd.
International Classes:
B28B1/14; E21D11/08; B28B13/02; (IPC1-7): B28B1/14; B28B13/02; E21D11/08
Domestic Patent References:
JP8244012A
JP852714A
JP61107505U
JP8258027A
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation
Kensuke Isshiki
Noritaka Harashima



 
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