Effect of Permeation Grouting Using Cement Kiln Dust (CKD) On Some Mechanical Properties of Sandy Soil

Permeation grouting is a suitable technique to enhance the geotechnical characteristics of granular soils, several researches have proved that permeation grouting using conventional grouting materials has improved the behavior of the treated soils, but the use of conventional materials causes additional costs. Cement Kiln Dust (CKD) is a significant by-product produced in considerable quantities during the production of Ordinary Portland Cement. This study was conducted to assess the effect of permeation grouting using (CKD) grouts on enhancing some mechanical properties of coastal sandy soil in Syria. To achieve the objective of this study; a laboratory grouting model was manufactured. The studied sand has been grouted with suspensions consisting of different percentages of (CKD) (2, 4, 6, 8, 10, and 12%) as a proportion of the dry weight of the treated sand, and various mixing ratios (Water: CKD) (2:1, 4:1, 6:1, 8:1, and 10:1). Then an inclusive laboratory study was carried out before and after grouting for (7 & 28) days of treatment. The results of this study proved the effectiveness of (CKD) grouts; the grouted sand has obtained a high unconfined compressive strength. Also, the values of both shear strength and cohesion increase, and the values of permeability coefficient decrease as (CKD) content and curing period increase.