Flexural strength of reinforced concrete beams of concrete containing iron filings as partial sand replacement

In this study, the effect of using iron filler as a partial substitute for natural sand. Four concrete beams 150×200×1600 mm with similar steel reinforcement (one beam for each iron filing percentage) in addition to the reference concrete beam were examined. The beams were tested by ultimate load failure, final deflection, energy absorption, stiffness, ductility index, compressive stress and studying cracks, then comparing them with reference beams to evaluate the effect of iron filing on their structural behavior. The results showed that increasing the iron filing content in the concrete beams led to an increase in the final failure load, final deflection, ductility index, strain, and energy absorption were 6.7, 10.29, 11.37, 25.3, and 35% respectively, compared to the reference beam. While there was a decrease in the initial stiffness and secant stiffness of 12.6% and 3.18%, respectively, compared to the reference beam.