Title:
CONCRETE AND PRODUCTION OF HIGH-STRENGTH CONCRETE MOLDING USING THE SAME
Document Type and Number:
Japanese Patent JP3343163
Kind Code:
B2
Abstract:
PURPOSE: To obtain a concrete excellent in operating efficiency and strength of a molding by blending a raw material for the concrete having a specified unit amount of cement, etc., with a specific natural anhydrous gypsum and a polycarboxylic acid-based cement dispersing agent in prescribed amounts.
CONSTITUTION: This concrete is produced by blending (A) a raw material for the concrete having 400-600kg/m3 unit amount of cement at ≤35wt.% water- cement ratio with (B) a natural anhydrous gypsum capable of providing 0.15-1.5wt.% SO4 ionic concentration of a 0.05wt.% aqueous solution of Na2HP4 at 20°C temperature when 100g aqueous solution is brought into contact with 1g thereof in an amount of 5-20wt.% based on the unit amount of the cement and (C) a polycarboxylic acid-based cement dispersing agent in an amount of 0.1-2wt.% based on the unit amount of the cement. The resultant concrete is good in operating efficiency due to no occurrence of false setting and a high-strength concrete molding can be obtained by molding the concrete.
Inventors:
Fumitoshi Niinuma
Toshio Kawano
Yoshitaka Ohmori
Noboru Miyazaki
Atsuo Kameoka
Toshio Kawano
Yoshitaka Ohmori
Noboru Miyazaki
Atsuo Kameoka
Application Number:
JP33232893A
Publication Date:
November 11, 2002
Filing Date:
December 27, 1993
Export Citation:
Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
C04B28/02; C04B20/02; C04B28/04; C04B40/02; C04B103/40; (IPC1-7): C04B28/02; C04B40/02
Domestic Patent References:
| JP5349021A | ||||
| JP5298730A | ||||
| JP5747752A | ||||
| JP6219803A |
Attorney, Agent or Firm:
Miyuki Ariga (3 outside)