Agnew, Mandy K. (Mandy Kay)2006-12-282006-12-2819981998http://hdl.handle.net/2440/19263Bibliography: p. 368-375.xv, 375 p. : ill. (chiefly col.), maps ; 30 cm.Laboratory tests using a wide range of additives have been undertaken to develop hardpans more akin to naturally occurring duricrusts. Some additives have developed cements which have the low permeability and porosity characteristics required, while maintaining a high level of resistance to both chemical and physical breakdown.218578 bytesapplication/pdfenAcid mine drainage.Thesis