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Acta Geodynamica et Geomaterialia

 
Title: RHEOLOGICAL PROPERTIES OF LATVIAN ILLITE CLAYS
 
Authors: Dusenkova Inga, Stepanova Valentina, Vecstaudza Jana, Lakevics Vitalijs, Malers Juris and Berzina-Cimdina Liga
 
DOI: 10.13168/AGG.2013.0046
 
Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 4 (172), Prague 2013
 
Full Text: PDF file (0.9 MB)
 
Keywords: illite, clay minerals, plasticity, apparent viscosity, mineralogical composition, electrical conductivity
 
Abstract: The influence of mineralogical composition, electrical conductivity and pH on the rheological properties of Latvian illite clays has been investigated. Samples from two deposits have been studied. The average plasticity index of samples from both Laza deposits is 23-25, but from Apriki – around 20. Based on these results, 2 samples with different plasticity indices from each borehole were chosen for further research. All suspensions exhibit yield-pseudoplastic behavior. Samples with the highest amount of clay minerals have the highest plasticity index and apparent viscosity. From 3 samples with similar amount of clay minerals and plasticity index one sample has higher pH and electrical conductivity and therefore exhibits lower viscosity.