Experimental study on the rheological behaviour of coal ash slurries

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Title:Experimental study on the rheological behaviour of coal ash slurries
Creators:
Assefa, K.M.; Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi - 110016, India.
Kaushal, D.R.; kaushal at civil dot iitd dot ac dot in; Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi - 110016, India.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 4, pp. 303-310
Uncontrolled Keywords:coal ash slurry, newtonian fluid, yield stress, plastic viscosity, relative viscosity

Abstract

Extensive experimental investigations were carried out to evaluate the rheological behaviour of fly ash (FA) slurry without and with the addition of bottom ash (BA) and BA slurry without and with the addition of FA. The FA slurries exhibited Bingham behaviour at solid mass concentrations ranging from 60–65% and mixing proportions from 10–40%. A substantial reduction in yield stress was observed except for mixing proportion of 40% on which the yield stress and viscosity were increased drastically for all solid concentrations. Hence, it can be concluded that the yield stress and viscosity of FA slurry were very much influenced by adding BA up to the mixing proportion of 30%. The rheological behaviour of BA slurries with and without the addition of FA in proportions of 10–50% was investigated and exhibited Newtonian behaviours for solid mass concentrations ranging from 30–50% without and with the addition of FA. The viscosity increases with increasing the solid concentrations and proportion of FA. Based on these experimental data, a correlation was developed to predict the relative viscosity of BA slurries as a function of solid volume fraction and FA mass proportion of 0–50% and the RMSE and R2 values showed good agreement between the experimental and the predicted data.

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Title:Experimental study on the rheological behaviour of coal ash slurries
Translated title:Experimental study on the rheological behaviour of coal ash slurries
Creators:
Assefa, K.M.; Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi - 110016, India.
Kaushal, D.R.; kaushal at civil dot iitd dot ac dot in; Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi - 110016, India.
Uncontrolled Keywords:coal ash slurry, newtonian fluid, yield stress, plastic viscosity, relative viscosity
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:4
Page Range:pp. 303-310
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8494
Item Type:Article
Deposited On:10 Dec 2015 17:53
Last Modified:10 Dec 2015 16:53

Citation

Assefa, K.M.; Kaushal, D.R. (2015) Experimental study on the rheological behaviour of coal ash slurries. Journal of Hydrology and Hydromechanics, 63 (4). pp. 303-310. ISSN 0042-790X

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