This research presents a procedure for further evaluation of the Effect of incorporating cement kiln dust (CKD) and aluminum powder (AP) on the mechanical features of the concrete. CKD and AW were converted into powder materials and used as a partial substitution of cement in concrete mixes at 0%, 10%, 15%, and 20% proportions. The properties focused on included the fresh and hardened characteristics of the concrete. Utilization of the slump test allowed the assessment of the workability of the fresh mixes, and after 28 days of curing, the hardened properties to be evaluated included compressive strength, flexural strength, splitting strength, and dry shrinkage. The replacement of the control, including a reduction in the level of CKD and AP replacement materials up to 10% has been shown to enhance the improvement of structural mechanical properties of concrete. Similarly, progressive replacement levels of 15% and 20% improved these properties slightly. Replacement of 10% resulted in a 22.92% increase in compressive strength of the specimen as opposed to 0% replacement specimens (Control), and this increase was observed in the rest of the mechanical properties as well. Besides, the incorporation of material replacement additives helped reduce shrinkage. The results of this study favour the formulation of "green" concrete with improved mechanical properties and reduced environmental impact in the building construction industry.
Radwa Defalla Abdel Hafez (Tue,) studied this question.