Flexural performance of recycled wheat straw ash-based geopolymer RC beams and containing recycled steel fiber

This research concentrates on adding wastes of lathe factories and workshops as steel fibers in reinforced recycled concrete geopolymer beams. As the geopolymer has emerged as a potential eco-friendly alternative to substitute the conventionally used Portland cement concrete. So, it permits imposition of by products such as wheat straw ash. Additionally, it owns the benefits of speedy strength achievement, excellent mechanical properties and prevention of water curing. Understanding the structural geopolymer concrete is extremely limited. In order to have a deeper knowledge of the structural behavior of geopolymer concrete elements and be able to develop a safe and efficient constructions, the flexural performance of 9 (nine) RC recycled geopolymer beams was examined. The reinforcement was designed considering under-reinforced section. All samples were tested under four lines of loadings. Results showed that the addition of lathe waste fibers to recycled concrete geopolymer beams had considerably improved in the loading carrying capacity, energy absorption, toughness and displacement ductility. A finite element analysis (FEA) to validate experimental study was achieved using ANSYS 2019-R1. The models had been confirmed by matching the results obtained with the experimental testing one. The analytical results were in a respectable agreement with the experimental ones.