File(s) under permanent embargo
Colloidal aspects of incompatibility reactions of bentonite with saline leachates as indicated from a modified fluid loss test
journal contribution
posted on 2019-01-01, 00:00 authored by Andras Fehervari, Will GatesWill Gates, Yang Liu, Abdelmalek Bouazza, Alla Marchuk, Serhiy Marchuk, Terence Turney, Antonio PattiThe fluid loss test has been used by geotechnical engineers for rapid evaluation of the hydraulic barrier properties of bentonites. In this study, a modified fluid loss test, along with visocmetric and electrophoretic mobility measurements, was used to assess the colloidal interactions of three powdered sodium bentonites with saline leachates, namely 0 to 2 N solutions of NaCl and CaCl2. The results indicate that the fluid loss test provides robust and reliable information on the water retention of bentonite, moreover, it gives information on the aggregate structure, size and settling of bentonite flocs and on the high-salt stabilization phenomena (packing and densification of clay aggregates) in saline leachates. Quantifying the water retention characteristics, along with the colloidal (i.e. flocculation) behaviour, using the fluid loss test, provides detailed understanding of barrier properties of bentonites important for various applications (e.g. barrier systems, dewatering etc.).
History
Journal
Canadian geotechnical journalVolume
56Issue
10Pagination
1406 - 1417Publisher
NRC Research PressLocation
Ottawa, Ont.Publisher DOI
ISSN
0008-3674Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, the authorsUsage metrics
Categories
No categories selectedKeywords
Fluid lossBentoniteRheologyElectrophoretic mobilityAggregationHigh-salt stabilizationScience & TechnologyTechnologyPhysical SciencesEngineering, GeologicalGeosciences, MultidisciplinaryEngineeringGeologyGEOSYNTHETIC CLAY LINERSHYDRAULIC CONDUCTIVITYELECTROLYTE CONCENTRATIONRHEOLOGICAL PROPERTIESBARRIER PERFORMANCEPOTASSIUM-CHLORIDESODIUM BENTONITENACL SOLUTIONSSWELL INDEXVISCOSITY
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC