UTILIZATION OF USING CEMENT KILN DUST (CKD) AS A SURFACIAL CLAY SOIL STABILIZER UNDERNEATH ROADS

Cement kiln dust (CKD) is produced at relatively high rates at cement industry plants all over Kingdom of Saudi Arabia (KSA) causing economical and environmental problems. A laboratory study was conducted to investigate the effectiveness of using CKD as sacrificial stabilizer of cohesive soil under roads. The study included measuring the effect of CKD addition with different percentages on soil properties. Significant increase in Liquid and plastic limits were recorded indicating reactivity of CKD with clay soil. CKD addition to clay soil significantly improved stress strain relationship, unconfined compressive strength (UCS), shear strength, compaction behavior and permeability of clay soil. The study indicated the effectiveness of applying CKD produced at Yanbu Cement Plant as a stabilizer of clay soil in sacrificial stabilization. Additing CKD to clay soil significantly improves the permeability of clay soil.