The effect of structural properties of Ankara clay on the electrokinetic properties

Abstract

The aim of this study is to investigate the effect of structural properties of soil known as Ankara clay, which contains different properties, on its electrokinetic behavior. For this purpose, the 8 disturbed samples from Ankara clay were collected from the different locations of Yüzüncüyıl and Karakusunlar areas, which were observed to contain no excess gravel and carbonate concretions. The electrokinetic behavior of these collected samples were evaluated by using the results of plastic limit, liquid limit, methylene blue, swelling, XRD, XRF, SEM, EDS and BET measurements and analyses as well as zeta potential tests. By these experimental studies, it has been determined that Ankara clay exhibits electrokinetic behavior in line with the whole rock composition since it contains different clay minerals. The monovalent and divalent electrolytes such as NaCl and CaCl2, respectively, increase the zeta potential of Ankara clay negatively. However, in the analyses, it was determined that FeCl3 trivalent electrolyte is the electrolytes etermining the zeta potential, tend to convert zeta potential of clays from negative to positive depending on the concentration, and this could be the case with increased concentration.

Keywords

• ankara clay
• electrokinetic
• sem
• eds
• zeta potential