The Effect of Steel Fibers with Different Diameters and Types on Idealized Rice Husk Ash Concrete in Terms of Tensile Strength

Reinforced concrete with steel fibers has become prevalent in structural engineering in recent decades due to its good mechanical performance. The primary purpose of this study is to increase concrete resistance properties using steel fibers and polypropylene. The reduction of cement consumption in concrete by using rice husk ash pozzolan was 10%, which replaced part of the cement. The effect of hooked steel fibers with two different diameters and corrugated steel fibers on compressive and tensile strength and modulus of elasticity with the same mixing design on standard cubic and cylindrical samples at 7 and 28 days was studied. The highest compressive strength of concrete contains hooked fibers with a diameter of 0.8 mm, and this increase reached 102% at the age of 28 days of concrete. The maximum tensile strength was also at 28 days of concrete with 0.8 mm diameter hooked fibers, which increased by 22% compared to concrete without fibers. The highest increase in the modulus of elasticity is also seen in sinusoidal fibers, which have a value of 29.6 GPa and a 19% increase compared to concrete. As the compressive strength increased, the modulus of elasticity also increased.