Performance of Polypropylene Fiber Reinforced GGBFS-based Alkali Activated Composite under Elevated Temperatures

This study evaluates the impact of incorporating polypropylene fibers on endurance 100% ground granulated blast furnace slag (GGBFS) based alkali-activated composite (AAC) exposed to elevated temperatures. In addition, critical variants, like fiber volume fractions, length, alkaline solution monomer ratio, and curing regime, overall performance fibrous composites under high temperatures was evaluated. While content varied at 0, 0.15, 0.3%, two lengths, 12 20 mm, were examined assess their influence thermal stability. The activating ratios (Na2SiO3/NaOH, denoted as SS/SH ratio) 2.5 3.0, different regimes adopted; ambient with temperature 24±2°C 65% RH, heat 24 h in oven 65°C, for all mixes. specimens subjected high-temperature effects 150, 300, 600, 800°C, results residual compressive strength, density, ultrasonic pulse velocity (UPV) examined, before after exposure, conditions. addition visual inspection, SEM analyses carried out evaluate effect parametric variances microstructure properties AACs exposure. variants short (12 mm) length most 0.15% long (20 exhibited stability better strength than equivalent control non-fibrous mixes when 150 300°C. Further, increase alkali ratio (SS/SH) from 3.0 has negatively influenced resistance across variants.