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:
Nov. 22, 1994
Filed:
Mar. 24, 1994
Shokichi Imaizumi, Tokyo, JP;
Tsuyoshi Aoyama, Houya, JP;
Nagao Hori, Tokorozawa, JP;
Katsumi Takenami, Tsurugashima, JP;
Kiyoshi Koibuchi, Yokohama, JP;
Youich Ishikawa, Tokyo, JP;
Seiji Kazama, Kawanishi, JP;
Koji Nasu, Nishinomiya, JP;
Kyowa Giken Co., Ltd., Osaka, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Dai-Ichi Cement Co., Ltd., Kanagawa, JP;
Naigai Technos Corporation, Osaka, JP;
Obayashi Corporation, Osaka, JP;
Abstract
A method is provided for making a fiber-reinforced slag gypsum cement lightweight hardened product. The method consists essentially of mixing (1) from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 .mu.m to (2) 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, (3) from 20 to 350 parts by weight of slag fine powder which has a fineness ranging from 6,000 to 12,000 cm.sup.2 /g as Blaine's specific surface area, (4) from 0 to 20 parts by weight of lime, (5) from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder, (6) 0.01 to 1.5 parts of a setting retardant; mixing water, prefoamed foams and reinforcing fibers with the mixture to obtain a slurry; subjecting the slurry to molding to obtain a molded product; removing the molded product to obtain a hardened product; and curing the hardened product with steam. In the method of the invention, the slurry sets and hardens within a short time, permitting the hardened product to be immediately removed from a mold.