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:
Jul. 14, 2009
Filed:
Feb. 08, 2007
Takahiro Sato, Muroran, JP;
Tomohiro Kanazawa, Muroran, JP;
Tadashi Hayasaka, Tokyo, JP;
Ken Uoya, Tokyo, JP;
Akira Takami, Muroran, JP;
Shin-ichiro Tada, Tokyo, JP;
Takahiro Sato, Muroran, JP;
Tomohiro Kanazawa, Muroran, JP;
Tadashi Hayasaka, Tokyo, JP;
Ken Uoya, Tokyo, JP;
Akira Takami, Muroran, JP;
Shin-ichiro Tada, Tokyo, JP;
Nittetsu Cement Co., Ltd., Hokkaido, JP;
Abstract
A grouting material which comprises an ultrafine particle material having a maximum particle size of 15 micrometer or less, containing 3 to 40% by mass of cement clinker, 60 to 97% by mass of and blast-furnace slag, 0.5 to 3 parts by mass of gypsum in terms of SObased on 100 parts by mass of the total amount of cement clinker and blast-furnace slag, and further comprises (i) 0.7 to 7 parts by mass of calcium-aluminate-based rapid-hardening admixture, (ii) 0.01 to 0.13 parts by mass of setting retarder, and (iii) 0.2 to 1.0 parts by mass of high-performance water-reducing agent, based on 100 parts by mass of the ultrafine particle material can maintain high injectability for long, and rapidly starts to set after injected to thereby exhibit a good short-term strength.