The Drivers of Hydraulic Conductivity in Green Liquor Dregs Amended Till: Application to Reclamation of Acid Generating Mine Sites

Abstract The mining industry produces massive amounts of waste that in contact with oxygen can result leaching metals. Access to a suitable cover-material for the mine is sometimes limited, creating driving force recycling industrial residues these purposes. Green liquor dregs (GLD), an residue from paper and pulp production, has potential be used sealing layer as amendment till. Though hydraulic conductivity commonly evaluate quality layer, field application laboratory investigations challenging many factors, apart vast variations physical properties both till GLD, control conductivity. In this study, 5–20 wt.% GLD two different mills, total solid contents particle size distributions, were mixed silty varying investigate how materials’ dry density, initial water content, compaction affects We found content materials was most important factor. With drier more should added attain lowest possible. not notably affect mixtures’