Title:
早期脱型材およびコンクリート製品の製造方法
Document Type and Number:
Japanese Patent JP5923104
Kind Code:
B2
Abstract:
To provide a rapid-hardening additive and a method for producing a concrete product, whereby an initial strength is obtainable even when a mixed cement is used. The rapid-hardening additive comprises a heat-treated product which is obtained by heat-treating a mixture of a CaO raw material, a CaSO 4 raw material and at least one raw material selected from the group consisting of an Al 2 O 3 raw material, a Fe 2 O 3 raw material and a SiO 2 raw material and which contains from 10 to 70 parts by mass of free lime, from 10 to 50 parts by mass of a hydraulic compound and from 10 to 60 parts by mass of an anhydrous gypsum, per 100 parts by mass in total of the free lime, the hydraulic compound and the anhydrous gypsum. The method for producing a concrete product comprises incorporating from 2 to 15 parts by mass of the above rapid-hardening additive in 100 parts by mass of a cement composition comprising cement and the rapid-hardening additive, and adjusting the stream curing temperature from casting to removal of formwork to be at most 70°C and the maturity from casting to removal of formwork to be from 210 to 320°C·hr.
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Inventors:
Takayuki Higuchi
Nguyen Duc Hoon
Shigeru Tomioka
Yoshino Ryoetsu
Nguyen Duc Hoon
Shigeru Tomioka
Yoshino Ryoetsu
Application Number:
JP2013538472A
Publication Date:
May 24, 2016
Filing Date:
August 29, 2012
Export Citation:
Assignee:
Denka Co., Ltd.
International Classes:
C04B22/06; C04B18/08; C04B18/14; C04B22/08; C04B22/14; C04B24/02; C04B28/02; C04B40/02
Domestic Patent References:
| JP2002293591A | ||||
| JP9052748A | ||||
| JP2001316147A | ||||
| JP2008266108A | ||||
| JP2001039748A |
Foreign References:
| WO2010143506A1 |
Other References:
笠井芳夫,コンクリート総覧,日本,技術書院,1998年 6月10日,第1版,第361頁
Attorney, Agent or Firm:
Kenji Izumina
Toshiharu Ogawa
Toshiharu Ogawa