Akademik Veri Yönetim Sistemi
European Journal of Engineering and Natural Sciences (EJENS), cilt.8, sa.1, ss.57-64, 2023 (Hakemli Dergi)
Air-entraining admixtures added to cementitious systems in order to increase freeze-thaw resistance also
affect the fresh state properties of the mixture. In this study, the effect of the use of air-entraining admixtures
on the rheological properties of urea-containing Portland cement systems was investigated. For this purpose,
3 different paste mixtures were prepared by adding 0.15% and 0.30% air-entraining admixtures to the control
mixture containing 3% urea instead of cement. The dynamic yield stress and viscosity values of the prepared
mixtures were determined in accordance with the Herschel Bulkley model. It was determined that the dynamic
yield stress values of the paste mixtures increased and the viscosity values decreased with the use of airentraining admixtures. It was understood that this behavior became more evident with the increase in the use
of admixtures.