Effect of temperature on rheological behavior of kaolinite and bentonite suspensions

Lin, Yuan; Cheah, Louis Ka-Jun; Phan‐Thien, N.; Khoo, Boo Cheong

doi:10.1016/j.colsurfa.2016.06.012

Cited by 28 publications

(8 citation statements)

References 22 publications

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“…Santoyo et al (2001) reported rheological measurements of typical water based drilling fluids (having four different bentonites containing mainly sodium-montmorillonite) used in geothermal drilling, which showed a small decrease of apparent viscosity up to temperatures between 80°C to 120°C and a drastic increase at temperatures N125°C and up to 175°C. Lin et al (2016), reported rheological measurements of commercial kaolinite and commercial bentonite water dispersions, at 3°C (close to seabed temperature) and at 25°C and found that as temperature increased, the yield stress of these dispersions increased.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Vryzas

Kelessidis

Nalbantian

et al. 2017

Applied Clay Science

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Temperature affects significantly the rheological behavior of neat water Wyoming Na-bentonite dispersions. The results of a very systematic study are presented regarding rheological measurements of 7% mass concentration at different temperatures, ranging between 25 and 80°C at atmospheric pressure. Higher temperature increased the shear stresses at low shear rates while the effect was much smaller at higher shear rates. The Herschel-Bulkley rheological model fitted extremely well all data. The yield stress increased linearly with temperature by almost threefold , the flow consistency index decreased exponentially with temperature by almost five-fold and the flow behavior index increased by about 20%, tending towards the Newtonian value. At low shear rates (b 100 rpm corresponding to b170 1/s Newtonian shear rates), which represent very well the shear rates experienced by drilling fluids in the critical annulus region, all rheograms appeared fairly linear and the Bingham plastic model fitted well all data. The Bingham yield stress, from the low shear rate data, increased linearly with temperature, while the plastic viscosity decreased with temperature, in a manner very similar to the decrease of water viscosity with temperature. The plastic viscosity and Bingham yield stress data, from the low shear rate range, can be fitted well by an Arrhenius-type equation, with the activation energy for the plastic viscosity very similar to the activation energy for water viscosity, while for the Bingham yield stress, the activation energy is equal but opposite in sign to that of the plastic viscosity. A hypothesis is stated for the the observed linear increase of the yield stress with temperature, in the temperature range studied. One should be concerned when non-standard preparation and measurement procedures are followed which makes extremely difficult to understand any differences observed when reporting rheological data of water bentonite dispersions. A standard methodology is proposed, complementary to API, which can give very consistent results.

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Section: Introductionmentioning

confidence: 99%

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Vryzas

Kelessidis

Nalbantian

et al. 2017

Applied Clay Science

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“…However, the higher value of plasticity index of clay EC was related to its high amount of smectite clay mineral and was a negative point for the use of this clay as alternative ball clay. The green strength property is very important in most type of claybased bodies because they need to be handled during the [6,10,11,18,19,21].…”

Section: Resultsmentioning

confidence: 99%

“…The term ball clay is used to describe fine-grained, highly plastic, sedimentary kaolinitic clays [6]. These clays can also be defined as kaolinitic clay with minor to abundant organic matter content which generates high green strength as well as fired strength in ceramic bodies and usually results in fired product with white or off-white color [7][8][9][10][11]. Ball clays also have a profound influence on the rheological properties of the dispersions used in the production of sanitary ware porcelains [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Brazilian Northeastern plastic clays

2019

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Plastic clays are one of the main raw materials used in ceramic technology. However, there is a shortage of good quality plastic clays in the world for use in porcelain technology. The aim of this study was to characterize plastic clays from Northeastern Brazil. Chemical and mineralogical composition, particle size distribution, plasticity and green strength of the clays were determined. The analyzed clays were predominantly composed of kaolinite and quartz, and some contained smectite. The amount of iron oxide in the clays was higher than 1.0% and for some of them the values were higher than 3%; the liquid and plastic limits ranged from 22% to 48% and 10% to 32%, respectively. According to characterization data, three plastic clays had potential to be used as alternative ball clay, due to their plasticity and mineralogical characteristics.

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“…The rheology of several aqueous suspensions was studied depending on the type and content of bentonite, electrolyte and additives as well as pH-value and aging time [23][24][25][26][27][28]. Also, temperature affected greatly the rheological properties [29,30]. However, thermodynamic nature of aqueous bentonite suspensions has not yet been adequately discussed.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Interpretation on the Rheology of Aqueous Bentonite Suspensions

Bozdoğan¹,

Önal²,

Pekdemir³

et al. 2020

Rev. Chim.

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Since their exceptional rheological behavior, bentonite suspensions are widely used in engineering, industrial, agricultural, and drilling applications. So, the aim of the present study is to investigate the rheological properties of three types aqueous suspensions prepared with calcium bentonite (CaB), sodium bentonite (NaB) obtained from that by Na2CO3 activation, and NaB with the excess soda. The CaB taken from Giresun/Turkey region contains calcium smectite (CaxS) as clay mineral and opal CT (SiO2.nH2O) as impurity which is paracrystalline silica. Soda content by the activation and bentonite content in the suspension were changed in the interval of 2.5-15.0% and 5-20% by mass, respectively. CaxS completely converted to sodium smectite (Na2xS) by the activation with the soda content of 2.5% and then Na2xS+Na2CO3 mixtures formed. Rheological properties of these aqueous suspensions were measured using a Fann Viscometer. These properties reached their maxima by the most thixotropic Na2xS suspensions and greatly increased with the increasing of smectite content. Rheological plots drawn of the shear rate vs. shear stress in the interval of 170-1020 s-1 showed that the suspensions flow as a Bingham Plastic. Change in rheological properties depending on the smectite type and content as well as excess soda content was explained thermodynamically based on the chemical potential gradient between interlayer and dispenser waters.

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Effect of temperature on rheological behavior of kaolinite and bentonite suspensions

Cited by 28 publications

References 22 publications

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Characterization of Brazilian Northeastern plastic clays

Thermodynamic Interpretation on the Rheology of Aqueous Bentonite Suspensions

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