Title:
プレキャスト用セメント混和剤組成物
Document Type and Number:
Japanese Patent JP7457491
Kind Code:
B2
Abstract:
To provide a cement admixture composition for a precast, capable of exhibiting cement strength more rapidly than conventional cement admixtures.SOLUTION: A cement admixture composition for a precast comprises: a copolymer (α) having a structural unit (a1) derived from an unsaturated carboxylic acid monomer (A1) and a structural unit (a2) derived from a (poly)alkylene glycol-based monomer (A2); and a compound (β) having two or more functional groups selected from the group comprising a hydroxyl group, a carboxyl group, an amino group, a sulfonic group, a phosphate group, a phosphorous group, and a group of these salts, and having a molecular weight of 1,000 or less, wherein a content of the compound (β) is 0.1 to 7 mass% based on 100 mass% of the copolymer (α).SELECTED DRAWING: None
Inventors:
Taichiro Arai
Application Number:
JP2019222185A
Publication Date:
March 28, 2024
Filing Date:
December 09, 2019
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C04B24/26; C04B24/06; C04B24/10; C04B24/32; C04B28/02; C04B40/02; C08F216/04; C08F220/06
Domestic Patent References:
| JP9040447A | ||||
| JP2003073157A | ||||
| JP4050181A | ||||
| JP2008094708A | ||||
| JP2015182917A | ||||
| JP7172889A | ||||
| JP2011057459A |
Foreign References:
| WO2015016152A1 |
Other References:
蒸気養生条件がコンクリートの強度発現に及ぼす影響,コンクリート専門委員会報告 F53,日本,社団法人 セメント協会研究所,2006年03月25日,P.1~14,URL:
大塚浩司,蒸気養生コンクリートの耐久性に及ぼす表面微細ひび割れの影響,土木学会論文集,日本,1998年02月,No.585/V-38,P.97~111
大塚浩司,蒸気養生コンクリートの耐久性に及ぼす表面微細ひび割れの影響,土木学会論文集,日本,1998年02月,No.585/V-38,P.97~111
Attorney, Agent or Firm:
Patent Attorney Firm WisePlus