首页|Exploring alkali-source,pore-filling and cementation damage effects in cemented clay with typical industrial waste binders
Exploring alkali-source,pore-filling and cementation damage effects in cemented clay with typical industrial waste binders
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Various industrial waste binders(IWBs)are being recycled in soil stabilization to save cement con-sumption.However,the coupled effects brought out by combined IWBs on stabilized soils are still un-clear.IWBs are categorized into two typical categories(IWB-A and IWB-B)referring to their chemical role in this study.The alkali-source effect,pore-filling effect and cementation damage effect by IWBs in soil stabilization are explored.A series of mechanical and microscopic tests is performed on stabilized clay with different proportions of IWB-A and IWB-B.Moreover,initial water contents and cement contents of cement-stabilized clay are varied to examine the evolution of coupled effect with void ratio and cementation level.The results indicate that the alkali-source effect strengthens the cementation bonds and increases the early strength by 0.5-1.3 times,whereas the pore-filling effect improves the micro-fabric especially for the specimen with a large void ratio.The alkali-source effect increases soil cohesion cu at the pre-yield stage,and the pore-filling effect increases frictional angle φu at the post-yield stage.The cementation damage effect is remarkable at a low void ratio,which may result in many extruded pores among soil aggregates.The strength evolution with IWB proportions can be well stimulated by considering the coupled alkali-source effect,pore-filling effect and cementation damage effect.The optimal proportion of IWBs corresponds to an optimal combination of coupled effect.
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