The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Apr. 22, 2021
Applicant:
Denka Company Limited, Chuo-ku, JP;
Inventors:
Daiki Shimazaki, Ichihara, JP;
Taiichiro Mori, Itoigawa, JP;
Assignee:
DENKA COMPANY LIMITED, Chuo-ku, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B 22/14 (2006.01); C04B 22/06 (2006.01); C04B 28/02 (2006.01); C04B 28/16 (2006.01); C04B 40/00 (2006.01); C04B 22/00 (2006.01);
U.S. Cl.
CPC ...
C04B 28/16 (2013.01); C04B 22/06 (2013.01); C04B 22/143 (2013.01); C04B 28/02 (2013.01); C04B 40/0039 (2013.01); C04B 22/008 (2013.01); C04B 22/14 (2013.01);
Abstract
A cement admixture containing free lime, gypsum, Ye'elimite, and ternesite, wherein the cement admixture has a mass ratio of the Ye'elimite to the ternesite (Ye'elimite/ternesite) of from 0.5 to 40. The cement admixture contains 20 to 80 mass % of the free lime. The cement admixture has a total mass ratio of the free lime and the gypsum anhydride to the ternesite ((free lime+gypsum anhydride)/ternesite) from 20 to 90. An expansive material which contains the cement admixture. A cement composition which contains the cement admixture.