The influence of cement kiln dust on strength and durability properties of cement-based systems
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info:eu-repo/semantics/closedAccessDate
2022Author
Hakkomaz, HadiyeYorulmaz, Hediye
Durak, Uğur
İlkentapar, Serhan
Karahan, Okan
Atiş, Cengiz Duran
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There are very few studies in the literature on the usage of CKD in cementitious systems. This article presents the laboratory
study results on the infuence of cement kiln dust (CKD) on the properties of mortar made with cement kiln dust and Portland cement. The article aims to prevent CKD’s (known as a hazardous waste product) damage to nature by utilizing CKD
in cementitious systems and contributing to sustainability by reducing cement amount in the cementitious system. For this
purpose, 5%, 10%, 15%, and 20% of CKD were replaced with cement and binary cementitious systems were formed. For all
mortar mixes, the water/binder ratio was kept constant at 0.5, and the sand/binder ratio was 3. Workability, dry unit weight,
water absorption ratio and porosity, fexural strength, compressive strength, abrasion, carbonation, and high-temperature
resistance tests were performed on the mortar specimens. Based on the results of laboratory work, it was observed that the
replacement of CKD with cement reduces the workability of fresh mortar. Compressive and fexural strengths of CKD-added
mixtures were found to be equivalent or insignifcantly lower than that of the control sample. The addition of CKD had a
negligible efect on water absorption and porosity of samples. Besides, the residual compressive strength determined after
the elevated temperature test for the sample made with CKD were found to be equivalent or higher compared to the control
sample. Present laboratory studies showed that utilization of CKD in cementitious mortar system is feasible in terms of
testing conducted.