| 摘要 |
PROBLEM TO BE SOLVED: To provide a self-dispersive molding excavation stabilizing solution obtained by combining a water-foamable component with an excavation stabilizer component containing bentonite and molding them, said stabilizing solution being self-dispersive and being prepared without agitating them, recovering a deteriorated excavation stabilizing solution, and having improved handling. SOLUTION: A self-dispersive molding excavation stabilizing solution medium comprises mixing 2-20 wt.%, preferably 3-10 wt.% of excavation stabilizer components containing 40-80 wt.%, preferably 50-70 wt.% of bentonite comprising a concentration ratio of Ca/Na being 0.9 or less, preferably 0.8 or less in leaching ions, and at least 80 wt. of weight grain size distribution of 74μm or less materials, and 5-45 wt.%, preferably 20-40 wt.% of water-foamable components of 100-250μm particle diameter which the gas generated when foaming occurs is harmless to the human body, and molding the resultant into a desired shape to obtain the self-dispersive molding excavation stabilizing solution medium. This self-dispersive molding excavation stabilizing solution medium of 10-100 g, preferably 30-50 g is dispersed into water of 1 l to obtain a diluted self-dispersive molding excavation stabilizing solution medium. This diluted self-dispersive molding excavation stabilizing solution medium of 1-20 g is added to a deteriorated excavation stabilizing solution of 1 l to recover it.
|
