@mastersthesis {52743,
	title = {Laboratory study of freeze-thaw dewatering of Albian mature fine tailings (MFT)},
	year = {2012},
	pages = {208 pages },
	school = {University of Alberta Department of Civil and Environmental Engineering },
	address = {Edmonton, AB   },
	abstract = {Tailing ponds in Northern Alberta has covered an area of 170 km2. Directive 074 issued in 2009 set stringent criteria for tailings reclamation. Freeze-thaw dewatering is one of the most promising approaches for dewatering MFT as one cycle of freeze-thaw can release up to 50\% pore water. In this research, freezing tests were conducted with different temperature boundaries. A lower freezing rate induced higher solids content and higher undrained shear strength. In addition, finite strain consolidation tests were performed on both as-received and frozen/thawed MFT. Freeze-thaw decreased the compressibility to about half that of as-received MFT and increased the permeability to 6 times that of as-received MFT with the same void ratio. Both compressibility and permeability curves converged at higher effective stress (σ{\textquoteright}=100 kPa). The coefficient of consolidation of frozen/thawed MFT was larger at lower effective stress and smaller at higher effective stress, comparing with that of as-received MFT. These results can be used to predict the field behaviors of Albian MFT and optimize the application of freeze-thaw dewatering. },
	keywords = {geotechnical properties, tailings, tailings treatment, UofA},
	url = {http://hdl.handle.net/10402/era.25691},
	author = {Zhang, Ying}
}
