Thixotropic Properties of Latvian Clays

Vitālijs Lakevičs, Valentīna Stepanova, Augusts Ruplis

Abstract


This research studies Latvia originated Devon (Tūja, Skaņkalne), quaternary (Ceplīši), Jurassic, (Strēļi) and Triassic (Vadakste) deposit clays as well as Lithuania originated Triassic (Akmene) deposit clays. Thixotropic properties of clay were researched by measuring relative viscosity of clay in water suspensions. Relative viscosity is measured with a hopper method. It was detected that, when concentration of suspension is increased, clay suspension’s viscosity also increases. It happens until it reaches a certain boarder point when viscosity increases significantly – a dramatic rise is shown on the curve. It means that clay particles make a lace-like, easily broken structure. Impact of chemical reagents on clay suspensions’ thixotropic properties is researched. Experimental results obtained on the new materials with thixotropic properties will allow precise definition of production technologies and usage of a new approach in development of motivation products. Likewise, the results will make an important investment in establishing a thixotropic material description methodology.

Keywords


clays; concentration; suspension; thixotropy; viscosity

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References


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Lakevičs V. , Stepanova V., Ruplis A. Pētījumi par Latvijas mālu tiksotropām īpašībām, LU 69. Zinātniskās konferences tēzes, LU, 2011.

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DOI: http://dx.doi.org/10.17770/etr2011vol1.903

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