Experimental study on resistivity and strength properties of solidified heavy metal contaminated soil
In order to study the relationship between resistivity and strength of solidified heavy metal contaminated soil,resistivity test and unconfined compressive strength of rice husk ash(RHA)-cement solidified cadmium(Cd)-contaminated soil were carried out.Uniaxial stress-strain-resistivity relationship of solidified soil was obtained by uniaxial compression-resistivity joint test,the influencing factors of initial resistivity and its correlation with strength were analyzed,and the models of strength prediction and mechanical damage based on resistivity were established.The results show that there is a negative correlation between the stress-strain and the resistivity-strain curves of solidified soil.The initial resistivity increases first and then decreases with the increase of RHA content,and reaches the peak when the RHA content is 5％,while the initial resistivity decreases continuously when the cement content is high.The initial resistivity of the solidified soil increases continuously with the increase of age,increases first and then decreases with the increase of Cd content,and reaches the lowest when the Cd content is 2 000 mg/kg.The compressive strength of solidified soil can be predicted by the strength prediction model based on initial resistivity.The mechanical damage model based on real-time resistivity can be used to predict the damage development before soil failure during uniaxial compression of solidified soil.
cadmium contaminated soilsolidification/stabilizationstress-strain-resistivitystrength predictiondamage model
NETL
NSTL
万方数据
