Yield stresses and sedimentation in dense flyash slurries

Stanmore B.R. and Page D.W. (1992) Yield stresses and sedimentation in dense flyash slurries. Powder Technology, 72 2: 167-175. doi:10.1016/0032-5910(92)88023-B

Author Stanmore B.R.
Page D.W.
Title Yield stresses and sedimentation in dense flyash slurries
Journal name Powder Technology   Check publisher's open access policy
ISSN 0032-5910
Publication date 1992-10-15
Sub-type Article (original research)
DOI 10.1016/0032-5910(92)88023-B
Volume 72
Issue 2
Start page 167
End page 175
Total pages 9
Language eng
Subject 1500 Chemical Engineering
1606 Political Science
Abstract Dense slurries (of volume fraction up to 0.6) were made from ashes collected from three different power stations. The slurries were tested for yield strength by a vane technique when freshly mixed and after settling. A six-bladed vane attached to the sensing head of a rotational viscometer was inserted into the slurry and slowly rotated until shear failure occurred. The maximum volume fraction was measured by extrapolation of the yield stress. The maximum volume fraction and hence yield stress depends on the electrolyte concentration in the slurry. The effects can be explained in terms of the electrical double layer surrounding the particles. The yield stress of an ash containing leachable calcium increased with time due to the pozzolanic action of precipitated calcite.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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Created: Tue, 30 Aug 2016, 12:10:31 EST by System User