الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Cement kiln dust (CKD) is a fine dust mixture of partially calcined and unreacted raw feed, enriched with alkali sulfates, halides, and other volatiles generated during the production of the cement in clinker stage. About 5 to 10 percent of these raw materials are producing dust out of the dryers, mills, kilns, ♦coolers and transportation facilities. The huge quantity of CKD generated during production process of cement causes a disposal and environmental problem.
In this study, CKD is used as a filler in Poly (vinyl chloride) to prepare different
composites for pipe grade. The composite samples are manufactured by dry-blending
of PVC/CKD, and other processing additives in high intensity mixer. The dry blend compounds were melted using brabender torque rehometer and compression molded into plates. Six different (CKD) weight percentages were incorporated in the PVC matrix including 0, 5, 10, 15, 20 and 25 wt.%. The composites were studied
mechanically by tensile, notching izod impact, flexural and shore hardness D tests. The composites were investigated physically by specific gravity, the water absorption and shrinkage tests. The flammability analysis was performed through the Limiting Oxygen
Index test (LOI). The thermal properties were determined using thermogravimetric analysis (TGA) to investigate the thermal stabilities of composites after adding CKD.
The structure of the composites was studied by scanning electron microscope (SEM) to investigate the distribution of CKD particles inside the PVC matrix. Vinyltrimethoxysilane (0.75 %) was added to 15 and 25 wt.% PVC/CKD composites in order to study the effect of coupling agent on mechanical, physical and structure of PVC/CKD composites.