Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rheology of bentonite dispersions: Role of ionic strength and solid content
https://orcid.org/0000-0002-2527-9066
Highlights Yield stress and viscosity change with both solid content and ionic strength. Yield stress and viscosity are predicted by models based on DLVO theory. Viscosity curves can be normalized to a master curve by two key parameters. Yield stress reflects strength of inter-particle interaction. The corresponding yield viscosity estimates level of particle orientation.
Abstract The rheological behavior of the bentonite dispersion was studied at different ionic strength and solid content. The yield and flow behavior of the dispersion changed with both the ionic strength and the solid content. Curves of the equilibrium viscosity normalized by two characteristic parameters, namely, the yield stress and the characteristic viscosity, formed a master curve. The electrostatic interaction reflected by the yield stress hindered the orientation/alignment of clay platelets estimated by the characteristic viscosity, giving rise to a power law relationship between the two characteristic parameters. Models based on the DLVO (Derjaguin and Landau, Verwey and Overbeek) theory were developed to describe the change of the yield stress and the characteristic viscosity as functions of both ionic strength and bentonite solid content. The master viscosity curve allows viscosity curves at different solid content and ionic strength to be determined once the yield stress and the characteristic viscosity of the dispersion are known. A constitutive model for the master viscosity curve as a function of the normalized shear stress and rate was proposed.
Rheology of bentonite dispersions: Role of ionic strength and solid content
https://orcid.org/0000-0002-2527-9066
Highlights Yield stress and viscosity change with both solid content and ionic strength. Yield stress and viscosity are predicted by models based on DLVO theory. Viscosity curves can be normalized to a master curve by two key parameters. Yield stress reflects strength of inter-particle interaction. The corresponding yield viscosity estimates level of particle orientation.
Abstract The rheological behavior of the bentonite dispersion was studied at different ionic strength and solid content. The yield and flow behavior of the dispersion changed with both the ionic strength and the solid content. Curves of the equilibrium viscosity normalized by two characteristic parameters, namely, the yield stress and the characteristic viscosity, formed a master curve. The electrostatic interaction reflected by the yield stress hindered the orientation/alignment of clay platelets estimated by the characteristic viscosity, giving rise to a power law relationship between the two characteristic parameters. Models based on the DLVO (Derjaguin and Landau, Verwey and Overbeek) theory were developed to describe the change of the yield stress and the characteristic viscosity as functions of both ionic strength and bentonite solid content. The master viscosity curve allows viscosity curves at different solid content and ionic strength to be determined once the yield stress and the characteristic viscosity of the dispersion are known. A constitutive model for the master viscosity curve as a function of the normalized shear stress and rate was proposed.
Rheology of bentonite dispersions: Role of ionic strength and solid content
https://orcid.org/0000-0002-2527-9066
Highlights Yield stress and viscosity change with both solid content and ionic strength. Yield stress and viscosity are predicted by models based on DLVO theory. Viscosity curves can be normalized to a master curve by two key parameters. Yield stress reflects strength of inter-particle interaction. The corresponding yield viscosity estimates level of particle orientation.
Abstract The rheological behavior of the bentonite dispersion was studied at different ionic strength and solid content. The yield and flow behavior of the dispersion changed with both the ionic strength and the solid content. Curves of the equilibrium viscosity normalized by two characteristic parameters, namely, the yield stress and the characteristic viscosity, formed a master curve. The electrostatic interaction reflected by the yield stress hindered the orientation/alignment of clay platelets estimated by the characteristic viscosity, giving rise to a power law relationship between the two characteristic parameters. Models based on the DLVO (Derjaguin and Landau, Verwey and Overbeek) theory were developed to describe the change of the yield stress and the characteristic viscosity as functions of both ionic strength and bentonite solid content. The master viscosity curve allows viscosity curves at different solid content and ionic strength to be determined once the yield stress and the characteristic viscosity of the dispersion are known. A constitutive model for the master viscosity curve as a function of the normalized shear stress and rate was proposed.
Rheology of bentonite dispersions: Role of ionic strength and solid content
Lin, Yuan (Autor:in) / Qin, Huaitao (Autor:in) / Guo, Jin (Autor:in) / Chen, Jiawang (Autor:in)
Applied Clay Science ; 214
04.09.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of pH and electrolyte on the rheology of aqueous Wyoming bentonite dispersions
| Online Contents | 2007
Abrasivity by bentonite dispersions
| Elsevier | 2009
Abrasivity by bentonite dispersions
| Online Contents | 2009
Abrasivity by bentonite dispersions
| Online Contents | 2009