Effect of aggregate size on sediment bed rheological properties

Franks, George V., Zhou, Ying, Yan, Yao-de, Jameson, Graeme J. and Biggs, Simon (2004) Effect of aggregate size on sediment bed rheological properties. Physical Chemistry Chemical Physics, 6 18: 4490-4498. doi:10.1039/b402580f


Author Franks, George V.
Zhou, Ying
Yan, Yao-de
Jameson, Graeme J.
Biggs, Simon
Title Effect of aggregate size on sediment bed rheological properties
Journal name Physical Chemistry Chemical Physics   Check publisher's open access policy
ISSN 1463-9076
1463-9084
Publication date 2004-09-21
Year available 2004
Sub-type Article (original research)
DOI 10.1039/b402580f
Open Access Status
Volume 6
Issue 18
Start page 4490
End page 4498
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted abstract
Three different types of aggregates of submicron alumina particles were produced utilising either polymer, high salt (1.0 M), or low salt (0.075 M) aggregation conditions. All three types of aggregates had similar structural properties (mass fractal dimension = 2.0). The typical size (d[4,3]) of the polymer aggregates was 125 microns, the high salt aggregates 12 microns and the low salt aggregates 4 microns. It was found that smaller aggregates produced higher gel points and higher apparent maximum packing fractions. Larger aggregates produced higher shear and compressive yield stresses at all volume fractions. The relative effect that aggregate size and interparticle attraction has on the sediment yield stresses was investigated in the salt system. The salt concentration was adjusted so as to produce different size aggregates with the same final salt concentration and thus same level of inter-particle attraction. The size of the aggregates and the magnitude of the inter-particle attraction were found to have similar contributions to the compressive yield stress over the range of size and attraction investigated.
Keyword Chemistry, Physical
Physics, Atomic, Molecular & Chemical
Chemistry
Physics
CHEMISTRY, PHYSICAL
PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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