A Comparative Analysis of the Use of Limestone Dust and Hydrated Lime in Stabilizing Bad Clayey Soil to be used for Road Embankments.

Document Type : Research Studies

Author

Assistant Professor., Civil Engineering Department., Higher Institute of Engineering and Technology., Kafr El-Sheikh Kafr El-Sheikh., Egypt.

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

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