Abstract
Based on X-ray computed tomography measurements of aggregate macro-structure and compressive dewatering tests, this paper demonstrates that aggregate breakage and structural re-organization during mixing in the thickening process can account for some of the experimentally measured changes in solids volume fraction that have been until now attributed to aggregate densification. This paper highlights the lack of information about the micro-scale mechanisms of flocculated sediment consolidation and suggests several experimental and theoretical experiments that could be conducted to improve the situation.
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