| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a grouting material shortened in gel time while maintaining high permeability. SOLUTION: This grouting material comprises powder material of hydraulic superfine particles satisfying the following conditions (1) to (4) and water-soluble hydration reaction accelerator (except ettringite precursor): (1) The powder material contains cement clinker fine powder, blast furnace slag fine powder and gypsum fine powder, (2) the mixture of the cement clinker with gypsum fine powder has 10. 5μm maximum particle diameter and <=50 vol.% 2.2μm sieve through content, (3) the blast furnace slag fine powder has <=10. 5μm maximum particle diameter and <=50 vol.% 2.2μm sieve through content and (4) powder material obtained by mixing each component has <=10.5 maximum particle diameter and <=45 vol.% 2.2μm sieve through content. The water-soluble hydration reaction accelerator is preferably at least one kind of substance selected from a group comprising an inorganic carbonate, an inorganic heavy carbonate and an inorganic chloride.</p> |
