Mechanical Properties of Polypropylene-Fiber-Reinforced High-Performance Concrete Based on the Response Surface Method

Polypropylene fibers are added to concrete improve the toughness of material. Manufactured sand and fly ash with high content used reduce impact on environment cost. The response surface method (RSM) was design test study mechanical bending properties polypropylene-fiber-reinforced high-performance (PPFHPC). Three process variables, including polypropylene fiber (1%, 1.5%, 2%), (45%, 60%, 75%), water-binder (W/B) ratio (0.27, 0.3, 0.33), were considered as factors. compressive strength, flexural flexural-compressive ratio, splitting tensile first-crack strength thin plate evaluated. prediction model established by RSM showed correlation predictability between factors, corresponding relationship equation factors obtained. Results multiobjective optimization indicated that optimal three (content PPF, FA, W/B) 2%, 62%, 0.27. can be predict basic materials. This laid a theoretical foundation for development PPFHPC