Türk, FurkanKaya, MuratSaydan, MuratKeskin, Ülkü Sultan2022-10-082022-10-0820221964-81892116-7214https://doi.org/10.1080/19648189.2022.2108502https://hdl.handle.net/20.500.13091/2983Admixtures such as viscosity modifying agents and mineral admixtures could be used to regulate the rheological behaviour of the self-compacting concrete mixture. Herein, cellulose nanofibres obtained from Cladophora sp., a bio-waste that pollutes water bodies and threatens the ecosystem, were used to provide appropriate plastic viscosity in self-compacting mortars instead of a traditional viscosity modifying agent known as Welan gum (WG). Within the scope of the study, mini-slump, mini-V funnel, viscosity tests, compressive-flexural strength tests and FE-SEM analyses were performed on the mortar and cement paste specimens prepared. According to the rheological results, increases of up to 93% in plastic viscosity and increases of up to 10 times in yield stress were observed in the CCF-used specimens. On the other hand, increases in yield stress up to seven times and in plastic viscosity up to 37% were determined in the specimens with WG added. Moreover, as a result of mechanical tests, increases of up to 15% in compressive strength and up to 7% increases in flexural strength were observed in the WG-added specimens. While the decreases of up to 4% in compressive strength were observed, increases of up to 12% in flexural strength were detected in the CCF-added specimens.eninfo:eu-repo/semantics/closedAccessAlgaeCladophora speutrophicationviscosity modifying agentself-compacting mortarWelan GumRheological PropertiesCement PastesMechanical PerformanceYield-StressFly-AshConcreteAdmixturesBehaviorStabilityArticle10.1080/19648189.2022.21085022-s2.0-85136782886