Patent ID: 8080104

Claim:
A filling material for a reinforcing joint comprising: cement, an expansive additive, pozzolana fine powder, a water reducing agent, and a fine aggregate, wherein the expansive additive is a calcium aluminoferrite based expansive additive, the pozzolana fine powder is siliceous fine powder with a silicon dioxide (SiO 2 ) of not less than 90% and a hydrogen ion concentration found in an acid region, the water reducing agent is a polycarboxylic acid based water reducing agent, the calcium aluminoferrite based expansive additive shows a Blaine's specific surface area between 2,000 and 6,000 cm 2 /g and is contained by 1 to 4 portions in 100 portions of a binder formed by the cement, the expansive additive and the pozzolana fine powder, the pozzolana fine powder is contained by 5 to 15 portions in 100 portions of said binder, the polycarboxylic acid based water reducing agent is contained by 0.05 to 0.24 portions in the form of powder to 100 portions of said binder, so that the filling material provides a retention of fluidity of 192 mm or higher at 0 min. from preparation of the filling material and 180 mm or higher at 60 min. from the preparation of the filling material determined by Standards Association JIS R5201-1997, a rate of change of the length from 232×10 −6 to 920×10 −6 determined by Annex 1 of Japan Industrial Standards JIS A 6202, and a compressive strength of 151 N/mm 2 or higher after 28 days from preparation of the filling material determined by Japan Society of Civil Engineers JSCE-G505-1999.