Abstract
In the more than ten years since its development, QCB has been highly evaluated at many soil-stabilizing sites for its ease of handling and the stabilization effects. Meanwhile, in the search for effective ways to utilize the wastewater sludge ash that is discharged from wastewater treatment plants, we have experimentally studied QCB containing sludge ash to ascertain its soil-stabilizing effects, and the prevention of toxic dissolution from the ash into improved soil. The results of these experiments were satisfactory in terms of soil stabilization and the prevention of toxic dissolution.
