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:
Dec. 20, 2011
Filed:
May. 22, 2007
Tetsuo Otsuka, Itoigawa, JP;
Tooru Shiraiwa, Itoigawa, JP;
Tooru Yagi, Itoigawa, JP;
Masahiro Abukawa, Tokyo, JP;
Tetsuo Otsuka, Itoigawa, JP;
Tooru Shiraiwa, Itoigawa, JP;
Tooru Yagi, Itoigawa, JP;
Masahiro Abukawa, Tokyo, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Splice Sleeve Japan, Ltd., Tokyo, JP;
Abstract
A filler for reinforcement joint that ensures excellent fluidity and retention thereof, exhibiting appropriate length change ratio and high strength performance; and a method of reinforcement joint filling operation using the same. There are provided a filler for reinforcement joint containing a cement, an expanding material, a pozzolana micropowder, a water reducing agent and a sand, and a method of reinforcement joint filling operation using the same, characterized in that the expanding material is a calcium aluminoferrite expanding material, and that the pozzolana micropowder is a silicious micropowder having a silicon dioxide (SiO) content of 90% or higher and having a hydrogen ion concentration falling in an acid region, and that the water reducing agent is a polycarboxylic acid water reducing agent. The calcium aluminoferrite expanding material preferably has a value of Brain specific surface area of 2000 to 6000 cm/g. The sand is preferably a weighty sand of 3.0 g/cmor higher density.