The use of egg shell, chicken feathers, marble powder as concrete admixture and investigation of the effects.

Food industry waste has a great potential for use in terms of prevalence, accessibility and quantity. In this research, the effects of eggshells on concrete by substitution of cement were investigated. In addition, the results of using chicken feathers together with egg shells as fiber reinforcement material were also examined. For the comprehensive evaluation of the effects of eggshell, marble dust, which is a waste of limestone and marble industry widely used in the cement industry, was also used as an additive. In this context, an additive-free cement was prepared under laboratory conditions and 12 cement samples with additives were prepared by substituting all additives to this cement in different proportions. Physical, chemical and mechanical tests of these samples were carried out. According to the test results, conformity assessment of all samples according to the cement standard was carried out separately. It has also been determined that CEM I 42.5 R Portland cement can be produced and used at higher rates by substituting up to 10% of ground eggshell. Cement produced with eggshell has been found to increase the early strength of concrete. In addition, it was determined that the setting time of the concrete was shortened if chicken feathers were added to the cement together with the egg shell. 2023, x + 76 pages Keywords: Cement, Concrete, Eggshell powder, Chicken feather, Marble powder, Limestone.