Akademik Veri Yönetim Sistemi
VI. INTERNATIONAL EURASIAN SCIENTIFIC RESEARCH AND INNOVATION CONGRESS, Dubai, Birleşik Arap Emirlikleri, 6 - 10 Ocak 2026, ss.192-205, (Tam Metin Bildiri)
Electrical curing has proven to be an efficient substitute for traditional thermal curing in order to expedite the geopolymerization process in such applications. In the current research investigation, geopolymer beams were prepared on a macro-scale using a dual binder system involving fly ash and granulated blast furnace slag in an identical proportion. Geopolymer mixtures were prepared using an alkali activator composed of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) with a fixed Na₂SiO₃/NaOH ratio of 2.0, while the aggregate-to-binder and activator-to-binder (a/b) ratios were maintained at 2.5 and 0.70, respectively. Subsequently, they were subjected to three curing regimes: ambient curing, thermal curing at 80 °C for 24 h, and electrical curing under a constant voltage of 25 V. To provide sufficient electrical conductivity, 0.5% (by volume) conductive fibers consisting of carbon, steel, and waste wire fibers together with 2% carbon black (by volume) were incorporated. A total of 12 reinforced geopolymer beams were cast with a rectangular cross-section of 150 × 150 mm and a total length of 1300 mm, corresponding to a clear span of 1200 mm. The beams were detailed according to reinforced concrete design principles with two Ø8 mm longitudinal bars at the bottom and two Ø8 mm longitudinal bars at the top, Ø8 mm transverse reinforcement, a net concrete cover of 25 mm, stirrups spaced at 100 mm, an effective depth of 121 mm, and an a/d ratio of 4.96, ensuring a flexure-dominated structural configuration. After curing, core specimens were extracted from the geopolymer beams, and these cores were subsequently tested for compressive strength, water absorption, apparent porosity, and ultrasonic pulse velocity to enable a systematic comparison of material characteristics under different curing conditions, thereby establishing a consistent experimental basis for assessing electrically cured geopolymer beams at the structural scale.