Laboratory study on stabilization of clayey soil with cement kiln dust and fiber

Abstract

Use of waste materials in ground improvement and soil stabilization is becoming important because of increasing costs of waste disposal and environmental considerations. Cement kiln dust is one of the waste materials obtained as by-product of cement manufacturing process the disposal of which is not manageable and poses serious environmental threat. The cement kiln dust can be used in stabilization of soils and wastes, production of cement, agricultural and cement concrete products. This experimental work focuses on study of different characteristics of clayey soil using waste cement kiln dust obtained from nearby cement factory. The polypropylene waste fiber was utilized to further improve the properties of cement kiln dust stabilized soil. Proctor compaction, unconfined compressive strength, California bearing ratio and split tensile strength tests were performed at different percentages of cement kiln dust without fiber and with optimum fiber content. The compaction characteristics were observed to improve with the maximum dry density occurring at 12% cement kiln dust. The results reveal that both unconfined compressive and split tensile strengths increase with curing period and the maximum values achieved at 12% cement kiln dust. The compaction and strength characteristics were observed to improve at the optimum content of polypropylene waste fiber.