Improvement of Swelling Soil by Mixing it with Cement kiln Dust in Al-Muthanna Governorate, Iraq

Abstract

Improvement of characteristic of swelling soil in expressions of bearing, swelling index, compaction and economic is the entrance according to an engineering vision. The swelling soil might be improved by chemical and /or mechanical techniques. Chemical additives could be suitable for stabilizing the physical and mechanical properties of swelling soils by addition cement kiln dust (CKD) which is an industrial products as well as waste materials. In this research, cement kiln dust (CKD) was used as an improver for geotechnical properties of swelling soil. Soil specimens are mixed with 3%, 6% and 12% of CKD (dry weight ratios) and are tested to find out their physical, mechanical properties and swelling pressure .The results pointed that the swelling soil mixed with 12% CKD has properties that satisfied the standard requirement and that make it as subgrade layer in roads construction.