In this study, the effect of iron powder (Fe2O3) on the compressive strength,\ntensile strength, workability, and porosity of the binary blended concrete\nwere experimentally investigated. For this purpose, Portland cement was partially\nreplaced by 1.5%, 2.5%, 3.5%, and 5% by weighing of iron powder. The\namount of water-binder-ratio was considered constant. The workability of\nthe fresh composite concrete was determined using cone Abrams method;\nmechanical properties were determined included compressive and tensile\nstrengths at 7, 14, and 28 days and durability evaluated by water absorption\nand permeable porosity. It was observed that the compressive and tensile\nstrengths change with the replacement of iron powder by up to 5%. However,\nthe maximum improvement was gained at 2.5 wt% for compressive strength\nand 1.5 wt% for tensile strength. The workability of the fresh mixtures decreased\nwhen iron powder amount increased. It was observed that the porosity\ndecreased respectively by 21.88% and 26.77% at 1.5 wt% and 2.5 wt% replacement.\nMoreover, this present study shows the importance and benefits\nto improve concrete properties by using micro-particles materials.
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