Authors: Faris M. Jasim1 & Tava Mohammed1
1Erbil Polytechnical University, Erbil Engineering Technical College, Highway Engineering Department, Erbil, Iraq
2Erbil Polytechnical University, Erbil Engineering Technical College, Civil Engineering Department, Erbil, Iraq
Abstract:Pavement damage is an inevitable phenomenon, it can be resisted by solutions that strengthen the embankment and they don’t increase the costs greatly. One interesting solution regarded, is the addition of cement kiln dust (CKD) to increase California bearing ratio (CBR) of soil. The main objective of this investigation is to enhance poor soil in the subgrade layer located in the 150 m ring road Erbil. The poorer soil was identified as TP1, located near the junction of Ganjan – Bahrka, 120 meters from the intersection. To achieve these objectives, cement kiln dust (CKD) was added to the soil at five different rates (0.5%, 1%,1.5%,2%, 2.5%) and it was found that 2% CKD was capable of achieving the targeted CBR rate of 25%. The results of this study also confirmed that the applied method has many positive aspects from technical, economic and environmental point of view, that will contribute to improve the design procedures of roads, bridges, service ways, shoulders and culverts.
Keywords: California Bearing Ratio (CBR), Cement Kiln Dust (CKD), Stabilization, Poor Soil, Subgrade Layer
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