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:
Mar. 03, 2020
Filed:
May. 28, 2019
Taiheiyo Cement Corporation, Tokyo, JP;
Risa Nakayama, Chiba, JP;
Katsuya Kono, Chiba, JP;
Katsuhiko Tada, Chiba, JP;
Hiroaki Mori, Chiba, JP;
Shingo Sugiyama, Chiba, JP;
Shinpei Maehori, Chiba, JP;
TAIHEIYO CEMENT CORPORATION, Tokyo, JP;
Abstract
Provided is a cement composition that has high fluidity (for example, a 0-drop flow value of 200 mm or more) before curing and exhibits high compressive strength (for example, 320 N/mmor more) after curing. The cement composition includes a cement, a silica fume having a BET specific surface area of from 10 m/g to 25 m/g, an inorganic powder having a 50% cumulative particle size of from 0.8 μm to 5 μm, a fine aggregate having a maximum particle size of 1.2 mm or less, a water reducing agent, an antifoaming agent, and water. The ratio of the cement is from 55 vol % to 65 vol %, the ratio of the silica fume is from 5 vol % to 25 vol %, and the ratio of the inorganic powder is from 15 vol % to 35 vol % in the total amount of 100 vol % of the cement, the silica fume, and the inorganic powder.