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Corresponding Author

Abo Elnaga, Islam

Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

Lime is used in soil–stabilization as a rapid and economic method for improving the strength and the characteristics of clayey soil which used as highways subgrade . Lime is one of the most powerful stabilizing materials which when added to a clayed soil serves to decrease plasticity , reduce water content and increase soil workability of wet clay prior to compaction Two types of lime , limestone dust and hydrated lime are used to improve the properties of the high compressible clayey soil, type A-7-6, which represents the most bad inorganic soil in the AASHTO soil classification system . Results show that both types of lime helps in great improvement of soil properties as plasticity, grain size CBR VALUE (California Bearing Ratio) and unconfined compressive strength Moreover, hydrated lime gives slightly better results than limestone dust but it is more expensive . So, this study encourages the use of limestone dust

Keywords

Stabilization; Clayley soil; Highways subgrade; Limestone dust; Hydrated lime; plasticity; and Grain size

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