Title:
CEMENT COMPOSITION
Document Type and Number:
Japanese Patent JP2020001954
Kind Code:
A
Abstract:
To provide a cement composition excellent in strength development and small in dry shrinkage even when a large amount of fly ash is contained.SOLUTION: There is provided a cement composition containing a normal Portland cement clinker powder and a high early strength Portland cement clinker powder, containing a clinker powder having iron rate of 1.85 to 2.03, gypsum, a limestone powder having Blain specific surface of over 5,000 cm/g and/or a blast furnace slag powder having Blain specific surface of 3,000 cm/g or more, and fly ash with percentage of the gypsum (in terms of SO) of 1.0 to 3.0 mass% in total 100 mass% of the clinker powder and the gypsum (in terms of SO), percentage of the limestone powder and/or the blast furnace slag powder of 1.0 to 10.0 mass% in total 100 mass% of the clinker powder, the gypsum (in terms of SO), the limestone powder and/or the blast furnace slag powder and the fly ash, and percentage of the fly ash of over 10 mass% and 40 mass% or less.SELECTED DRAWING: None
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Inventors:
KUGA RYUICHIRO
TADA MASATO
KUROKAWA DAISUKE
BABA TOMOYA
UCHIDA SHUNICHIRO
HOSHINO SEIICHI
TADA MASATO
KUROKAWA DAISUKE
BABA TOMOYA
UCHIDA SHUNICHIRO
HOSHINO SEIICHI
Application Number:
JP2018122240A
Publication Date:
January 09, 2020
Filing Date:
June 27, 2018
Export Citation:
Assignee:
TAIHEIYO CEMENT CORP
International Classes:
C04B7/02; C04B7/26; C04B14/28; C04B18/14; C04B28/04
Domestic Patent References:
| JP2017149638A | 2017-08-31 | |||
| JP2018087111A | 2018-06-07 | |||
| JP2001220208A | 2001-08-14 | |||
| JP2013133251A | 2013-07-08 | |||
| JP2013180904A | 2013-09-12 | |||
| JPH07207264A | 1995-08-08 |
Foreign References:
| WO2018047230A1 | 2018-03-15 |
Other References:
早強ポルトランドセメント, JPN6021050307, 24 January 2015 (2015-01-24), pages 1, ISSN: 0004666455
コンクリート総覧, vol. 第1版, JPN6022011432, 10 June 1998 (1998-06-10), pages 14 - 15, ISSN: 0004736654
コンクリート総覧, vol. 第1版, JPN6022011432, 10 June 1998 (1998-06-10), pages 14 - 15, ISSN: 0004736654
Attorney, Agent or Firm:
Naoyuki Koda
Shuichi Kitamura
Toshiya Murachi
Shuichi Kitamura
Toshiya Murachi