Compressive strength and modulus of elasticity of concrete using iron fibers

This paper presents the effect of using iron fiber to the value of compressive strength and modulus of elasticity of concrete. The iron fibers used in the concrete mixture are 50 mm long and 5 mm wide which is the waste of the lathe. For this purpose, there are 5 variations of concrete mixture with iron fiber content of 0%, 6%, 8%, 10% and 12% of cement weight for each mixed variation. The test specimens used are cylindrical in diameter 150 mm and 300 mm in height. The value of fresh concrete slump is set in the range 100-140 mm. The value of compressive strength and modulus of elasticity of concrete was obtained from concrete cylinder testing after 28 days of curing. The test results showed that the concrete mixture with iron fiber content of 8% yielded the highest compressive strength from the variation of the mixture of concrete using iron fiber. The value of the modulus of elasticity of the concrete obtained from the test results shows the same trend with the elasticity value calculated using the empirical equation.