2026-10-29T22:18:13Zhttps://munzur-rdlopen.rawdatalibrary.net/oai/request

oai:munzur-rdlopen.rawdatalibrary.net:munzur/15152026-10-28T15:28:47Zopenairedrivercom_munzur_1col_munzur_2com_munzur_8col_munzur_154

Optimization, high-temperature resistance, and sulfate durability of basalt powder–blended alkali-activated slag mortarsArslan, FurkanDener, MuratKarataş, MehmetBenli, AhmetActivation parametersAlkali-activated materialsCuring temperatureGBFSNatural pozzolanSulfate resistanceThis study investigates the feasibility of using basalt powder (BP), an industrial by-product with limited reactivity, as a partial substitute for granulated blast furnace slag (GBFS) in alkali-activated systems. A comprehensive experimental program was conducted in two stages: first, a systematic optimization was performed by varying mixture parameters, including BP content, alkali dosage, activator modulus, and curing temperature to evaluate compressive strength development; second, selected binder compositions were used to produce self-compacting mortars, which were further examined for flexural strength, high-temperature resistance, and sulfate durability. The results demonstrated that moderate substitution levels (up to 20–30 % BP) could achieve satisfactory compressive strength, particularly under elevated curing temperature (60 °C) with 8 % Na2O and low to moderate modulus values. At 300 °C, mixtures with 20 % BP exhibited strength enhancement due to additional geopolymerization, demonstrating superior thermal stability compared to the control. Crucially, the incorporation of BP enhanced sulfate resistance, with the 40 % BP mixture exhibiting a slight increase in compressive strength after long-term exposure, in contrast to the marked deterioration of the GBFS-only system. Consequently, this study demonstrates that BP can be effectively utilized as a sustainable binder component, offering a practical solution for waste management while enhancing the durability of alkali-activated mortars against aggressive conditions.Elsevier Ltd2026Articlehttps://rdlopen.rawdatalibrary.net/r/munzur/1515https://doi.org/10.1016/j.jobe.2026.1152362352-7102enJournal of Building Engineeringinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://munzur-rdlopen.rawdatalibrary.net/tr/items/munzur/1515