Abstract. Sedimentation and consolidation tests have been conducted on sludge produced from an acid mine drainage (AMD) treatment plant. The testing program involved the development of a new laboratory system, designed and constructed to assess the specific properties of low density slurry. During the instrumented large size column tests, the evolution of sedimentation and hydrodynamic consolidation was monitored with optical observation of the solidliquid interface, evaluation of density with gamma ray sensors, and measurement of pore pressure u using transducers. At the end of each test, physical and geotechnical properties of the resulting sludge were measured. In this paper, the authors will present a brief overview of the set up, followed by a presentation of new test results with the analysis using sedimentationconsolidation theories. The results presented here will be used in future analyses to evaluate the volume changes of AMD treatment sludge in storage basins.Additional Key Words: AMD, large strain, mechanical properties.
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