Reducing Risks to Tailings Storage Facilities through In-Line Flocculant Addition

Silva, da; Fernando, Ashani

doi:10.1061/41165(397)301

Cited by 5 publications

(2 citation statements)

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“…Where successfully implemented, PT has been seen to result in beneficial outcomes with respect to deposition behaviour, including an increase in initial dewatering rates (Kaiser et al 2006;Brumby et al 2008;da Silva 2011;COSIA 2012;Sobkowicz 2013;Caldwell et al 2014), increased yield stress and beach slope (Kaiser et al 2006;Brumby et al 2008;da Silva 2011;Charlebois et al 2013), and a reduction in segregation at a given slurry density (da Silva 2011;COSIA 2012). While the potential benefits of PT on depositional behaviour and initial dewatering have been demonstrated, the implementation of PT raises questions regarding the potential for this treatment technique to modify the subsequent geotechnical properties of a material.…”

Section: Introductionmentioning

confidence: 96%

“…However, more recently, the trialling and full scale application of polyacrylamide-based polymers at or near the point of deposition has increased significantly (Kaiser et al 2006;Adkins et al 2007;Brumby et al 2008;da Silva 2011;COSIA 2012;Riley and Utting 2014;Beveridge et al 2015;Reid and Boshoff 2015). This technology has been referred to variously as "in-line flocculation" (Beier et al 2013;Sobkowicz 2013), "pipe-head flocculation" (Slatter and Seddon 2015) and "Enhanced Tailings Disposal" (Adkins et al 2014).…”

Section: Introductionmentioning

confidence: 96%

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Laboratory assessment of the effects of polymer treatment on geotechnical properties of low-plasticity soil slurry

Reid

Fourie

2016

Can. Geotech. J.

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A laboratory study was undertaken to assess the effects of polymer treatment (PT) on the geotechnical behaviour of a low plasticity slurry. PT was undertaken on the material using a high molecular weight polyacrylamide polymer. Slurry consolidometer and triaxial testing were undertaken to compare the geotechnical behaviour of the material following PT, compared to an untreated (UT) condition. The material was prepared from a slurry state in a non-segregating condition, to enable comparison of uniform samples. Testing indicated that PT resulted in lower final consolidated densities at a given magnitude of effective stress, while increasing rate of consolidation and hydraulic conductivity. Triaxial testing indicated that PT material, when sheared, appeared to exhibit a different critical state line (CSL) than UT material. The PT CSL was higher in void ratio terms than the UT CSL, and with an increased compressibility. Both PT and UT material exhibited undrained shear strengths consistent with the state of the specimen with respect to that material's CSL. PT material exhibited higher undrained shear strengths at a given density. All the effects observed following PT appeared to persist across a wide range of effective stresses.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%