Investigation of chemical stability and its impact on the quality of cemented mine tailings Abstract The use of cemented mine tailings is widespread in northwest Quebec, as it improves the stability of underground facilities and allows landfilling of mine residues that may be highly toxic. However, recent studies have shown that, over time, cemented tailings may undergo chemical transformation that decreases their mechanical strength. In order to assess the magnitude of this hazard to miners, the effect of variations in the binder content of 33 cementing formulations was evaluated experimentally in 3 mines, under conditions mimicking real-life conditions. Although the cemented tailings did not undergo chemical transformation, certain formulations were found to be considerably less hazardous than others, a valuable finding in itself. Produced Under this Project Scientific Reports Investigation of chemical stability and its impact on the quality of cemented mine fill Research Report: R-260Investigation of chemical stability and its impact on the quality of cemented mine fill Research Summary: RR-260 Simplified Articles Stabilité des excavations minièresUne recette de base adaptable à chaque remblai Volume 14, n0 3 Scientific Publications Cementitious backfill with high sulfur content physical, chemical and mineralogical characterizationBenzaazoua M., Ouellet J., Servant S., Newman P., Verburg R.Source : Cement and Concrete Research, vol. 29, no 5, May 1999, p. 719-725« Évolution des propriétés des remblais en pâte: principaux paramètres d’influence »Benzaazoua M., Belem T., Bussière B., Ouellet S.Source : in 17e Colloque en Contrôle des terrains (17e : 19-20 mars, 2002 : Val-d'Or, Québec). (s.l), Association Minière du Québec, 2002, p. 12Effects of settlement and drainage on strength development within mine paste backfillBelem T., Benzaazoua M., Bussière B., Dagenais A.-M.Source : in Tailings and Mine Waste '02 : Proceedings of the 9th International Conference (9th : 27-30 January, 2002 : Fort Collins, Colorado). Rotterdam, Balkema, 2002, p. 139-148The Effect of microstructural evolution on the physical properties of paste backfillBelem T., Benzaazoua M., Bussière B.Source : in Tailings and Mine Waste '02 : Proceedings of the 9th International Conference (9th : 27-30 January, 2002 : Fort Collins, Colorado). Rotterdam, Balkema, 2002, p. 365-374Mechanical behaviour of cemented paste backfillBelem T., Benzaazoua M., Bussière B.Source : in Geotechnical Engineering at the dawn of the 3rd millennium : Proceedings of the 53rd Canadian Geotechnical Conference and the 1st Joint IAH-CNC/CGS Conference (53rd : September 18-20, 2000 : Montréal, Canada). Leboeuf, D.(ed.) Richmond, Canada, Canadian Geotechnical Society, 2000, p. 373-380Optimization of sulfurous paste backfill mixtures for increasing long-term strength and stabilityBenzaazoua M., Belem T.Source : in Waste Treatment and Environmental Impact in the Mining Industry : Proceedings on 5th International Conference on Clean Technology for Mining Industry (5th : 9-13 May, 2000 : Santiago, Chile). Sánchez, M.A.; Vergara, F. and Castro, S.H. (eds). Universidad Concepcion, 2000, vol. 1, p. 343-352Propriétés hydrogéo-chimiques des remblais en pâte : impacts sur le remblayage souterrain et l'entreposage en surfaceBenzaazoua M., Belem T., Bussière B.Source : in Colloque NEDEM 2000 (3-5 octobre, 2000 : Sherbrooke, Canada), 2000Effet du gonflement par les minéraux secondaires sur la qualité des remblais renfermant des sulfuresBenzaazoua M., Bussière B.Source : in Les sciences de la terre, une vision planétaire : Congrès de l'Association professionnelle des géologues et des géophysiciens du Québec / APGGQ (4e : 14-16 avril, 1999 : Rouyn-Noranda, Québec), 1999, p. 55-77 Additional Information Type: Project Number: 0098-0070 Status: Completed Year of completion: 2000 Research Field: Mechanical and Physical Risk Prevention Team: Mostafa Benzaazoua (Université du Québec en Abitibi-Témiscamingue)Jacques Ouellet (Université du Québec en Abitibi-Témiscamingue)