DEEP CEMENT MIXING METHOD WITHOUT HEXAVALENT CHROMIUM ELUTION

摘要

The present invention relates to a deep cement mixing method and, more specifically, relates to a deep cement mixing method capable of realizing equivalent or greater performance than an ordinary Portland cement type 1 by using slurry containing slag and a desulfurization process by-product, using a volume expansion effect to exclude use of bentonite, and minimizing elution of harmful ingredients such as hexavalent chromium or the like. According to the present invention, the deep cement mixing method comprises the following steps of: 1) interpenetrating an excavator under the ground up to a design depth; 2) drawing out the excavator again; 3) mixing slurry and soil on the excavated ground by injecting the slurry having slag and a desulfurization process by-product in at least any one step of the 1) step and the 2) step; and 4) hardening and curing the slurry.