Title:
METHOD FOR PRODUCING CYLINDRICAL STRUCTURE
Document Type and Number:
Japanese Patent JP2023146179
Kind Code:
A
Abstract:
To provide a method for producing a large-sized cylindrical structure by fiber-reinforced concrete.SOLUTION: Fiber-reinforced concrete is prepared, the orientation of fibers in the fiber-reinforced concrete is controlled, and it is installed into a cylindrical form. When the thickness of the cylinder is below 300 mm, the installation is executed from a place based on mobility in a horizontal direction using a tremie pipe 11, and when the thickness is 300 mm or more, the installation is executed by free fall from a hopper 10. When the installation is executed by free fall, the height of the free fall is 3 m or less. When the installation is executed by the tremie pipe 11, it is executed while rotating the tremie pipe 11 or the cylindrical structure itself. Regarding concrete used for the fiber-reinforced concrete, a water-binder ratio (W/B) is controlled to a range of 10 to 20%, the usage of a high performance water-reducing agent is controlled to a range of 1 to 2% with respect to the binder, and a flow value is controlled to a range of 240 to 320 mm.SELECTED DRAWING: Figure 3
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Inventors:
AKIMOTO MASAAKI
EGUCHI HIDEO
HATA MINORU
ISHIKAWA KURANOSUKE
EGUCHI HIDEO
HATA MINORU
ISHIKAWA KURANOSUKE
Application Number:
JP2022053240A
Publication Date:
October 12, 2023
Filing Date:
March 29, 2022
Export Citation:
Assignee:
NIPPON HUME CORP
International Classes:
B28B21/04; B28B7/16; B28C7/02; C04B14/48; C04B28/02
Attorney, Agent or Firm:
Shiroyuki Hori
Yukihiko Maeshima
Daiyu Murakami
Yukihiko Maeshima
Daiyu Murakami