Optimization of High-Strength Polypropylene Fiber Reinforced Fly Ash Concrete Using Minitab Statistical Software

The rapid expansion of infrastructure has intensified the need for high-performance and sustainable concrete. This study presents an experimental investigation into the mechanical properties of high-strength concrete incorporating fly ash as a partial cement replacement (0% and 40% by weight) and polypropylene (PP) fibers as reinforcement (0% and 1% by volume fraction). Concrete grades M20 to M60 were designed, cast, and tested at 28-day and 56-day curing ages for compressive strength (cube spec