GROUTING MATERIAL

摘要

A grouting material characterized by comprising 3-40 mass% cement clinker, 60-97 mass% blast-furnace slag, and 0.5-3 parts by mass of plaster in terms of SO₃ amount per 100 parts by mass of the sum of the cement clinker and blast-furnace slag, and by further containing 0.7-7 parts by mass of (i) a rapid-hardening calcium aluminate admixture; 0.01-0.13 parts by mass of (ii) a setting retarder; and 0.2-1.0 part by mass of (iii) a high-performance water-reducing agent per 100 parts by mass of those ultrafine particulate materials in the clinker, slag, and plaster which have a maximum particle diameter of 15 µm or smaller. The grouting material retains high injectability for long. After injection, the material rapidly starts to set to attain a satisfactory initial strength.