Denki Kagaku Kogyo Kabushiki Kaisha

Splice Sleeve Japan, Ltd.

Tooru Yagi

Masahiro Abukawa

Tetsuo Otsuka

Tooru Shiraiwa

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.

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Itoigawa, Japan

Tooru Yagi