Mechanical properties of cement treated zinc-contaminated loess
A series of studies were carried out to examine the strength and stress-strain characteristics of ce-ment-treated heavy metal-contaminated soil,with an emphasis on the actual engineering issue of heavy metal-contaminated loess and its deterioration.The research focused specifically on cement-treated zinc-contaminated loess,taking into consideration the influence of cement content and curing time.The experiments aimed to an-alyze the changes in the stress-strain curve,unconfined compressive strength,failure strain,and deformation modulus,and to construct a model of the stress-strain behavior under unconfined conditions.Additionally,a stress-strain model was developed for cement-treated zinc-contaminated loess under no-lateral limit conditions.The study reveals that the stress-strain curve of cement-treated zinc-contaminated loess exhibits strong softening behavior,resulting in brittle specimen damage.The curve can be divided into four stages:elasticity,elastic-plasticity,stress reduction,and residual stability.Furthermore,the study finds that with an increase in curing time and cement content,the unconfined compressive strength improves while the failure strain generally de-creases.The deformation modulus shows a non-linear relationship with the unconfined compressive strength.A stress-strain model is constructed to describe the non-linear relationships among curing time,cement content,deformation modulus,and unconfined compressive strength accurately.Specifically,the model considers the effects of curing time and cement content on the stress-strain behavior of cement-treated zinc-contaminated lo-ess under uniaxial pressure.Overall,these findings contribute to understanding the strength and stress-strain characteristics of cement-treated zinc-contaminated loess and provide valuable insights for addressing heavy metal contamination in loess engineering applications.
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