Title:
【発明の名称】コンクリート混和材の製造方法
Document Type and Number:
Japanese Patent JP2755700
Kind Code:
B2
Abstract:
PURPOSE:To obtain sufficiently high-strength concrete even by reducing an amount of expensively ultrafine silica used by blending specific two kinds of silica fine particles having different particle sizes to have two particle size distributions. CONSTITUTION:A silica-containing substance such as coal ash produced at thermal powder station of coal, silica sand or silas is mechanically ground by wet type stirring mill to give ground fine particles (1-5mum average particle diameter) silica-containing material. The ground fine particles are mixed with ultrafine silica (0.05-0.5mum average particle diameter) prepared by high- temperature vaporization method or hydrolysis method to give a blend having two particle size distributions, which is mixed with water and an admixture and made into a slurried state to give an admixture material for concrete.
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Inventors:
YOSHIDA HIROHISA
SAKAI MASAYASU
TAKEGAWA TOSHUKI
SAKAI MASAYASU
TAKEGAWA TOSHUKI
Application Number:
JP18893589A
Publication Date:
May 20, 1998
Filing Date:
July 24, 1989
Export Citation:
Assignee:
MITSUBISHI JUKOGYO KK
International Classes:
C04B18/08; B28C7/00; C04B14/06; C04B14/14; C04B22/06; (IPC1-7): C04B18/08; B28C7/00; C04B14/06; C04B14/14; C04B22/06
Domestic Patent References:
| JP61178462A | ||||
| JP5988355A | ||||
| JP627654A |
Attorney, Agent or Firm:
Akira Uchida (2 outside)