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Impact of Combined Stabilization on Strength and Hydraulic Properties of Subgrade Soil
Gypseous subgrade soil provide suitable bearing strength when dry, however, it exhibits weak and collapsible behaviour when flooded with water. The strength and waterproofing properties can be enhanced by combined stabilization. An attempt has been made in the present investigation to implement hydrated lime and cutback asphalt as a combined stabilizing agents to reserve the strength and hydraulic properties of the subgrade soil. California bearing ratio test and unconfined compression test have been conducted for determination of the strength. However, constant head permeability and absorption test were conducted to evaluate the hydraulic properties. It was observed that the coefficient of permeability declines by (78.7 and 87.4) % and the water absorption decreased by (25 and 90) % after implementation of asphalt and combined stabilization processes respectively as compared to control gypseous soil. The unconfined compressive strength increases by 283 % as compared with asphalt stabilized soil. The combined and asphalt stabilized mixtures exhibits the highest load bearing capacity at 12 mm deformation when tested at unsoaked condition, while the load bearing capacity declines after soaking by (30.7 and 61.5) % for combined and asphalt stabilized mixtures respectively. Combined stabilization of gypseous soil with lime and cutback asphalt is recommended to enhance the strength and hydraulic properties of the subgrade.
Impact of Combined Stabilization on Strength and Hydraulic Properties of Subgrade Soil
Gypseous subgrade soil provide suitable bearing strength when dry, however, it exhibits weak and collapsible behaviour when flooded with water. The strength and waterproofing properties can be enhanced by combined stabilization. An attempt has been made in the present investigation to implement hydrated lime and cutback asphalt as a combined stabilizing agents to reserve the strength and hydraulic properties of the subgrade soil. California bearing ratio test and unconfined compression test have been conducted for determination of the strength. However, constant head permeability and absorption test were conducted to evaluate the hydraulic properties. It was observed that the coefficient of permeability declines by (78.7 and 87.4) % and the water absorption decreased by (25 and 90) % after implementation of asphalt and combined stabilization processes respectively as compared to control gypseous soil. The unconfined compressive strength increases by 283 % as compared with asphalt stabilized soil. The combined and asphalt stabilized mixtures exhibits the highest load bearing capacity at 12 mm deformation when tested at unsoaked condition, while the load bearing capacity declines after soaking by (30.7 and 61.5) % for combined and asphalt stabilized mixtures respectively. Combined stabilization of gypseous soil with lime and cutback asphalt is recommended to enhance the strength and hydraulic properties of the subgrade.
Impact of Combined Stabilization on Strength and Hydraulic Properties of Subgrade Soil
Saad Issa Sarsam (author)
2021-07-27
oai:zenodo.org:5139652
Journal of Sustainable Construction Engineering and Project Management 4(2) 1-10
Article (Journal)
Electronic Resource
English
Absorption , stabilization , Soil , Cutback , Permeability , CBR , Unconfined Compression , Lime
DDC:
690
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