Title:
COVER AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2017100891
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a cover or the like used for a manhole, a side ditch or a cave pit, having high strength, dense cured body structure, high bearing force to load or impact load and excellent in salt shielding property, abrasion resistance, dimensional stability, water shielding property and durability such as freeze-thaw resistance.SOLUTION: There is provided a cover consisting of a cured body of cement composition containing (A) cement, (B) silica fume, (C) inorganic powder and an aggregate A having maximum particle diameter of 1.2 mm or less, high performance water-reducing agent, an antifoam agent and water and having following properties and percentage contents. (A) cement: 55 to 65 vol.%. (B) silica fume having BET specific surface area of 15 to 25 m/g: 5 to 25 vol.%. (C) the inorganic powder having 50% volume accumulative particle diameter of 0.8 to 5 μm: 15 to 35 vol.%.SELECTED DRAWING: None
Inventors:
TANIMURA MITSURU
Application Number:
JP2015233263A
Publication Date:
June 08, 2017
Filing Date:
November 30, 2015
Export Citation:
Assignee:
TAIHEIYO CEMENT CORP
International Classes:
C04B28/04; B28B11/24; C04B7/02; C04B14/06; C04B14/38; C04B14/48; C04B16/06; C04B18/14; C04B20/00; C04B40/02; E03F5/04
Attorney, Agent or Firm:
Norihiko Arai
Naoyuki Koda
Naoyuki Koda