In the present study effects of replacement of fine aggregate (sand) with high percentages of iron slag on the properties of Mortar. Cement mortars of mix proportion 1:3 with incorporating various percentage of iron slag was designed. Fine aggregate were replace with five percentage of iron slag. The percentages of replacements were 0, 10, 20, 30, and 40% by weight of fine aggregate. Tests were performed for compressive strength, split tensile strength, sulphate resistance, Rapid Chloride Permeability Test. Test for all replacement levels of iron slag at different curing periods (7, 28, 56 days ). Test result indicates that inclusion of iron slag as partial replacement with fine aggregate enhances the properties of Mortar.
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