Strength and Permeability Evaluation of hybrid steel –basalt fibres reinforced concrete

Abstract By incorporating hybrid fiber (steel and basalt) reinforced concrete, this study aims to investigate the distinctive intensity of optimal concrete performance while also assessing its mechanical as well as chloride permeability properties. In the experimental setup, many concrete mixtures with 1.5% steel fibers and varying percentages of hybrid fibres 1.2SF0.3BF, 0.9SF0.6BF, 0.6SF0.9BF, and 0.3SF1.2BF, were painstakingly constructed and evaluated. Steel and hybrid fibers used in the volume of concrete were taken into consideration when calculating the percentages of fibers. Finding the point of saturation at which maximal influence is attained and identifying any other relevant elements were the main goals. Six mixtures were created, one of which was used as regular concrete and had no fibers at all. In this study, M30 grade concrete with a 1.5% steel fibers and hybrid fiber content of 1.2SF 0.3BF, 0.9SF 0.6BF, 0.6SF 0.9BF, and 0.3SF 1.2BF was used. Tested components shaped like prisms, cylinders, and cubes underwent 7 and 28 days of water curing before being carefully prepared and put through intensive laboratory tests. For every % of fiber, several mechanical properties were evaluated, including flexural strength, split tensile strength, and compressive strength. Furthermore, a rapid chloride permeability test evaluation was carried out on specimens with 0% fibers, 1.5 steel fibers, and 0.9SF 0.6BF. %. The fiber content of the concrete matrix appears to have improved ductility, as seen by the reduced frequency of cracks observed in hybrid fibers.