| 摘要 |
PROBLEM TO BE SOLVED: To provide a curing agent for ground stabilization, which allows effective use of inexpensive gypsum by-produced in hydrogen fluoride production as an alkali-based silicate curing agent for ground stabilization, can stabilize diversified and complicated ground more surely and more highly, and can be used also for many other purposes and applications.SOLUTION: Provided is a curing agent for a ground stabilizing chemical that includes a liquid A comprising an aqueous alkali silicate solution and a liquid B, which are injected into the ground and cured in the ground to stabilize the ground, the liquid B being an aqueous slurry formed by dispersing in water: an anhydrous gypsum composition obtained by adding one or two or more alkaline materials to 100 pts.mass of gypsum by-produced in hydrogen fluoride production in an amount to neutralize free sulfuric acid contained in the by-produced gypsum or more and 500 pts.mass or less, followed by mixing, pulverization, and classification; a surfactant in a content of 0.35 or more and 1.25 pts.mass or less relative to a total of 100 pts.mass of the anhydrous gypsum composition and a curing enhancer/promotor; a defoaming agent in a content of 0.51 or more and 200 pts.mass or less relative to 100 pts.mass of the surfactant; and, if necessary, the curing enhancer/promotor. |
