Sustainable Stabilization of Poorly Graded Desert Sand by Cement Kiln Dust and Salt Water for Using in Backfilling and Subbase Layers

Effective use of natural materials and industrial by products has a direct impact on economy, sustainable environment, waste management. Poorly graded desert sand (SP) is widely observed in dunes seas. Studies were performed to get beneficial cement kiln dust (CKD) soil improvement. But there lack information concerning using CKD as an improving material for poorly with the aid salt water. Salt water available Egypt from seas some deep wells, it will help saving drink which suffers shortage many countries. The aim this research study possibility SP be used backfilling work subbase layers roads pavements. Mixtures various ratios (10%, 20% 30%) classified tested grain size distribution, compaction, shear strength California bearing tests. results compared potable show that adding improves characteristic properties even enhances optimum content 9.12% have noticeable improvement efficiently layers.