Rheology of fly ash mixed tailings slurries and applicability of prediction models

dc.creatorLee, Joon Kyu
dc.creatorKo, Junyoung (TTU)
dc.creatorKim, Young Sang
dc.date.accessioned2023-03-31T17:23:34Z
dc.date.available2023-03-31T17:23:34Z
dc.date.issued2017
dc.description© 2017 by the authors. Licensee MDPI, Basel, Switzerland. cc-by
dc.description.abstractCoal fly ash has potential applications in the management of reactive mine tailings. The shear stress versus shear rate curves obtained during viscometer tests are presented to describe the rheological behaviors of tailings slurries mixed with fly ash. The investigation was conducted on specimens prepared with different fly ash additions as well as prepared at variable conditions of temperature, mixing time, and CaCl2 solution. It was observed that the rheological properties of ash-tailings slurry mixtures are influenced by the hydration of fly ash as well as the particle packing and arrangement. Rheological properties of specimen mixtures were determined from the resulting flow curves using the existing rheological models. The performance of prediction models in calculating the rheological properties of the mixed specimens, as quantified by the root mean square error (RMSE), varied with the mixture constituents, temperature, and time. In general, the Papanastasion, Herschel-Bulkley, Sisko, and Robertson-Stiff models were found to be favorable for use with mixtures of fly ash and tailings slurries, compared to the Bingham, Modified Bingham, Casson, and De Kee models.
dc.identifier.citationLee, J.K., Ko, J., & Kim, Y.S.. 2017. Rheology of fly ash mixed tailings slurries and applicability of prediction models. Minerals, 7(9). https://doi.org/10.3390/min7090165
dc.identifier.urihttps://doi.org/10.3390/min7090165
dc.identifier.urihttps://hdl.handle.net/2346/92301
dc.language.isoeng
dc.subjectFly ash
dc.subjectModelling
dc.subjectRheology
dc.subjectSlurry
dc.subjectTailings
dc.titleRheology of fly ash mixed tailings slurries and applicability of prediction models
dc.typeArticle

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