CEMENTAL SOLIDIFIER FOR ORGANIC SOIL

摘要

PROBLEM TO BE SOLVED: To obtain a cemental solidifier which can give treated soil which can satisfactorily develop strengths by mixing portland cement having a specified specific surface area with a fine powder of high-blast furnace slag having a specified specific surface area and gypsum having a specific surface area in a specified ratio. SOLUTION: This solidifier comprises 20-40wt.% portland cement having a specific surface area of 3,000-5,500cm<2> /g, 60-40wt.% fine powder of high-blast furnace slag having a specific surface area of 4,000-10,000cm<2> /g and 10-30wt.% gypsum having a specific surface area of 3,000-7,000cm<2> /g. It is desirable to add at least either 1-3wt.% sulfate or 1-3wt.% chloride to the composition, for the soil treated with the resulting composition has an improved effect of developing strengths. The gypsum used may be any of gypsum dihydrate, hemihydrate gypsum and anhydrous gypsum. The sulfate used is exemplified by aluminum sulfate, alum or sodium sulfate, and the chloride used is exemplified by calcium chloride, magnesium chloride or iron chloride.