| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection material which shows very high permeability when it is injected even into a ground etc., of a low coefficient of permeability and does not bring out a decrease in a strength development at an early to middle period after injection. SOLUTION: The injection material comprises slag(A) of 50-90 pts.wt., gypsum(B) of 0.5-3 pts.wt. in terms of SO<SB>3</SB>, a cement clinker(C) of 10-50 pts.wt., a naphthalene sulfonic acid-based water reducing agent(D) or a mixture of a naphthalene sulfonic acid-based water reducing agent and a melamine sulfonic acid-based one of 0.1-5 pts.wt. and at least one sort(E) of 0.1-5 pts.wt. selected from a soluble sulfate, soluble thiosulfate and soluble sulfite except gypsum, and at least 95 vol% of the particles contained in the injection material except the particle of (E) is a particle having a particle diameter of not more than 10.5μm and the particle having a diameter of not more than 2.2μm is not more than 45 vol%. COPYRIGHT: (C)2004,JPO&NCIPI |
