Utilization of Marble Dust for Improving The Geotechnic Characteristics Of Collapsible Soil

Ashraf Nazir (Professor of Geotechnical Engineering, Faculty of Engineering, Tanta University, Egypt)
Moustafa El Sawwaf (Professor of Geotechnical Engineering, Faculty of Engineering, Tanta University, Egypt)
Wasiem Azzam (Professor of Geotechnical Engineering, Faculty of Engineering, Tanta University, Egypt)
Mohamed Ata (Research student, Faculty of Engineering, Tanta University, Egypt)

Abstract


An environment friendly and cost effective factor of collapsible soilstabilization with the help of industrial waste has been widely adoptedin this research. Buildings which are constructed on collapsible soils aresubjected to large deformations and shear failure. Collapsible soil can bebroadly categorized as those soils susceptible to a large reduction in volumeupon wetting. The mechanism usually involved in rapid volume reductionentails breaking of bonds at coarse particle contacts by weakening of finegrained materials brought there by surface tension in evaporating water.This research presents the effects of using marble dust on the geotechnicalproperties of Collapsible soil as a new stabilizing technique. A series ofexperimental tests are carried for samples of collapsing soil with andwithout stabilization using marble dust for dry and soaked conditions.The collapsible soil was mixed with marble dust at different contents of(0, 10, 20, 30%,40% and50%). The results indicated that, The optimumwater content decreases by 20.67% at marble content of 50%, liquidlimit decreses by35.41% at marble content of 50%and frictional angle forsoaked soil decreases by 66.09% at marble content of 50% while un soakedsoil decreases by54.68% at marble content of 50%. The maximum drydensity increases 5.91% at marble content of 50% and cohesion for soakedincreases314.2% at marble content of 50% while un soaked soil increases206.7% at marble content of 50%. It has been found that the adoptedmarble has a good effect in controlling the collapsing potential which isreduced by as much as 64.32% at marble content of 30%.

Keywords


Collapsible soil;Marble dust;Compaction;Atterberg;Shear;Strength

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References


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DOI: https://doi.org/10.30564/jgr.v2i4.2352

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