Next Article in Journal
Impact of Coalbed Incidence Angle on Methane Enrichment Zone in Longwall Gob
Previous Article in Journal
Formation and Aggregation of Gold (Electrum) Nanoparticles in Epithermal Ores
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Minerals 2017, 7(9), 165;

Rheology of Fly Ash Mixed Tailings Slurries and Applicability of Prediction Models

Department of Civil Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, Korea
Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409-1023, USA
Department of Marine and Civil Engineering, Chonnam National University, 50 Daehak-ro, Yeosu 59626, Korea
Author to whom correspondence should be addressed.
Received: 17 August 2017 / Revised: 4 September 2017 / Accepted: 6 September 2017 / Published: 8 September 2017
Full-Text   |   PDF [893 KB, uploaded 11 September 2017]   |  


Coal 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. View Full-Text
Keywords: rheology; tailings; fly ash; slurry; modelling rheology; tailings; fly ash; slurry; modelling

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Lee, J.K.; Ko, J.; Kim, Y.S. Rheology of Fly Ash Mixed Tailings Slurries and Applicability of Prediction Models. Minerals 2017, 7, 165.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top