Studying the effect of steel fiber reinforced content on the properties of lightweight aggregate concrete

Abstract

This research investigated significant effects of steel fibers on the properties of lightweight aggregate concrete. The mixes are designed with a Water/Binder ratio of 0.35 with a design slump of 60-80mm. Slump, bulk density, compressive strength, flexural strength and ultrasonic pulse velocity of concrete were tested. The results of the concrete slump meet the design requirements and tend to decrease as the steel fiber content increases. The dry bulk desity of lightweight concrete is 13% to 15% smaller than the CNA control concrete mix and meets the requirements for lightweight concrete according to EN 206-1: 2013 standards, the compressive strength, flexural strength, splitting tensile strength and ultrasonic pulse velocity of concrete increase when the steel fiber content increases in the concrete mix lightweight concrete. The results of analyzing the properties of concrete show that applying steel fibers to lightweight concrete significantly improves the properties of concrete.