RAPIDLY CURABLE COMPOSITION FOR CEMENT AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2005/042432

A1

A rapidly curable composition for cements which is satisfactory in initial gel strength and short-time gel strength and enables cement placing in, e.g., lands having many voids or a large amount of running water; a production process; and an application method. The rapidly curable composition for cements comprises calcium aluminate and an inorganic sulfuric acid salt, the amount of the inorganic sulfuric acid salt being preferably 50 to 200 parts by weight per 100 parts by weight of the calcium aluminate, and has a Blaine specific surface area of 7,500 cm²/g. The rapidly curable composition is preferably produced by mixing calcium aluminate having a Blaine specific surface area of 4,000 to 6,000 cm²/g with an inorganic sulfuric acid salt having a Blaine specific surface area of 3,000 to 6,000 cm²/g and pulverizing the mixture so that it comes to have a Blaine specific surface area of 7,500 cm²/g or higher.

OTSUKA TETSUO (JP)
TAKAHASHI MITSUO (JP)
YAMAMOTO KENICHIRO (JP)
SHIRAI KENTARO (JP)

PCT/JP2003/014020

May 12, 2005

October 31, 2003

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DENKI KAGAKU KOGYO KK (JP)
OTSUKA TETSUO (JP)
TAKAHASHI MITSUO (JP)
YAMAMOTO KENICHIRO (JP)
SHIRAI KENTARO (JP)

C04B28/06; (IPC1-7): C04B22/08; C04B22/14; C04B28/02; C09K17/02; C09K17/08; C09K17/10

JP2002088364A	2002-03-27
JPH08239660A	1996-09-17
JP2003138259A	2003-05-14
JPH05139804A	1993-06-08
JPH04305043A	1992-10-28

Senmyo, Kenji (38 Kanda-Higashimatsushitach, Chiyoda-ku Tokyo, JP)

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