Oliveira-Filho, WL, Silva, DR & Almeida, FE 2013, 'Thickening of iron ore tailings slimes using sub-aerial deposition: field experimental observations', in R Jewell, AB Fourie, J Caldwell & J Pimenta (eds), Paste 2013: Proceedings of the 16th International Seminar on Paste and Thickened Tailings
, Australian Centre for Geomechanics, Perth, pp. 87-100, https://doi.org/10.36487/ACG_rep/1363_07_Oliveira
This paper describes a field experiment of sub-aerial deposition of iron ore tailings slimes to study shrinkage characteristics of tailings under conditions of surface drying and lowered ground water level. The paper outlines site conditions and features of the test and describes instrumentation setup in detail. Material behaviour and climatic conditions were monitored during the desiccation process by a set of soil sensors and a weather station. Progress of water volumetric content, solids content, dry density, and gravimetric water content of soil during desiccation are presented, and the paper points out an efficient method to improve material properties. Crack formation and evolution over time is also described using photographs. Finally, there is a brief account of numerical modelling, which is compared with field data.
Abu-Hejleh, A.N. and Znidarcic, D. (1995) Desiccation theory for soft cohesive soils, Journal of Geotechnical Engineering, American Society of Civil Engineers, Vol. 121(6), pp. 493–502.
Almeida, F.E. (2004) Numerical analysis of desiccation of iron ore tailings, MSc Dissertation, Federal University of Ouro Preto, Brazil (in Portuguese).
Fujiyasu, Y. (1997) Evaporation behaviour of tailings, PhD Thesis, Department of Civil Engineering, The University of Western Australia.
George, K.P. (1968) Cracking in cement-treated bases and means for minimizing it, Highway Research Record, Vol. 263, pp. 47–59.
Konrad, J.M. and Ayad, R. (1997) Desiccation of a sensitive clay: Application of the model crack, Canadian Geotechnical Journal, Vol. 34, pp. 943–951.
Lima, L.M.K. and Oliveira-Filho, W.L. (2012) Formation of iron ore tailings deposits, Soils and Rocks, ABMS, Vol. 35(2), pp. 141–152.
Penna, D.C.R. and Oliveira-Filho, W.L. (2007) Undrained shear strength gain of fine ore tailings due to desiccation, in Proceedings VI Brazilian Symposium on Unsaturated Soils, Salvador, Brazil (in Portuguese).
Rao, K.S.S. and Satyadas, G.C. (1985) Measurement of volumetric and linear shrinkage on black cotton soil, Geotechnical Testing Journal, ASTM, Vol. 8(2), pp. 66–70.
Silva, D.R. (2003) Field desiccation studies of iron ore tailings, MSc Dissertation, Federal University of Ouro Preto, Brazil, 144 p. (in Portuguese).
Yao, D.T.C., Oliveira-Filho, W.L., Cai, X.C. and Znidarcic, D. (2002) Numerical solution for consolidation and desiccation of soft soils, International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 26, pp. 139–161.