Abstract
Electrical resistivity is a feature parameter of soils. It could be used to represent some fundamental geotechnical properties of soils. Based on the electrical resistivity study to cemented soil and contaminated soil, the electrical resistivity of cement solidified/stabilized contaminated soils was studied by laboratory test. Five types of artificial heavy metal contaminated soils (HMCS) were made up separately by mixing nitrate of Lead, Zinc, Cadmium, Nickel and Copper into the soils as the source of pollutant, and then treated by cement with different cement contents. Different concentration of heavy metal ions in HMCS was also considered during the test. Electrical resistivity of cement treated HMCS was measured at different curing time. The result shows that the electrical resistivity of cemented soils increases with the curing time and cement content no matter the soil is contaminated or not. The pollutant type and concentration are the main factors for electrical resistivity of contaminated soils no matter it has been treated by cement or not. More heavy metal ions in soil could lower the electrical resistivity of soil. Zinc contaminated soil and cement treated zinc contaminated soil have the highest electrical resistivity as comparing with other HMCS due to the high electrical conductivity of zinc ions. Unconfined compressive strength of cement treated Lead, Zinc, Cadmium, Nickel and Copper contaminated soils increased with the increase of their Electrical resistivity.
Published Version
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