THE METHOD OF PREPARING THE BLOCK OF YELLOW-SOIL USING MASATO-SOIL AND SLUDGE COMING INTO BEING BY SEPARATING SANDS FROM MASATO-SOIL

摘要

A method of manufacturing a loess block using masato soil and a sludge generated by separating sands from the masato soil is provided. The masato soil is formed by press molding under a pressure of 65 kg/cm2 using a block molding composition obtained by adding and homogenizing 8-10 parts by weight of a high strength solidification agent composition composed of 25 wt% of Portland cement, 20 wt% of a CSA expandable clinker powder, 20 wt% of blast furnace slag, 17 wt% of fly ash, 7 wt% of calcium sulfate, 5 wt% of lime, 3.5 wt% of sodium alginate and 2.5 wt% of sodium lignosulfonate, into 100 parts by weight of a blended soil containing 60-70 wt% of masato soil and 30-40 wt% of a sludge; adding and homogenizing 10-12 parts by weight of an aqueous solution of 15 wt% of a solidification agent composition including 30 wt% of urea, 28 wt% of calcium chloride, 16 wt% of magnesium chloride, 4 wt% of an EVA powder, and 2 wt% of an aqueous formalin solution thereto.