Prof. D. N. Singh

KANCHANA MENON

M.Tech.
Indian Institute of Technology Bombay, Powai, India kanchana.menon.r@gmail.com

SOME STUDIES ON ELECTRICAL IMPEDANCE SPECTROSCOPY OF SOILS

The conventional techniques used by geotechnical engineers over the years to find the physical, chemical and mineralogical properties of soils have been identified to have several limitations. In this context, the indirect measurement of these properties using electrical impedance spectroscopy (EIS) of soils may prove to be the next advancement in the field of characterisation of soils. Enough studies have been attempted to use the bulk electrical properties of soils for soil mass characterisation. However the bulk properties are not capable of capturing the wide range of information offered by multi frequency AC measurements. This is where the equivalent circuit analysis of soil using EIS gains importance. As this is a relatively new application to soils efforts have been made in this report to develop guidelines for the measurement of electrical impedance and the precautions to be taken to generate the optimal results. An attempt has also been made to generate equivalent circuits for the same.