Title:
TUNNEL CONSTRUCTING SEGMENT
Document Type and Number:
Japanese Patent JP2006016900
Kind Code:
A
Abstract:
To restrain an explosive fracture phenomenon of cement caused by a tunnel fire, by preventing a crack of the segment, in the tunnel constructing segment.
This invention is the tunnel constructing segment 1 mainly composed of highly fluid concrete for securing fluidity by adding a high performance AE water reducing agent. The segment 1 provides a tunnel constructing segment mixed with steel fiber SF for increasing strength and polypropylene fiber PP for enhancing fire resistant performance.
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Inventors:
KURAKI SHIYUUJI
OKAYAMA MASARU
DAN AKIHIRO
OKAYAMA MASARU
DAN AKIHIRO
Application Number:
JP2004197390A
Publication Date:
January 19, 2006
Filing Date:
July 02, 2004
Export Citation:
Assignee:
NIPPON CONCRETE IND CO LTD
International Classes:
E21D11/04; C04B14/48; C04B16/06; C04B28/02; E21D11/08
Attorney, Agent or Firm:
Takakichi Hayashi
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