A study on durability and strength properties of high strength concrete with partial replacement of iron ore tailings with fine aggregates

Abstract

Every year, million tonnes of iron ore tailings (IOT), are generated which are obtained at the time of processing of iron ore and are generally dumped in landfills, quarries, rivers, and seas, among other places, causing environmental issues. The primary goal of this research is to assess IOT as substitute for fine aggregates in concrete and compare the results to those of conventional concrete. With a 0.32 W/C ratio, concrete mixes including 0, 10, 20, 30, 40 and50%, IOT as fine aggregatesreplacement were made. Concrete containing IOT was tested for Workability, compressive and tensile strengths, and durability Test (water absorption, Acid test, Chemical test). Sieve analysis findings suggested that IOT met the criteria of Zone II, according to IS: 383–2016. The result findings showed that workability of concrete containing different percentage of IOT replacement was higher, andall other strength data were consistently greater than conventional concrete up to 40% replacement However, increased percentage of water absorption and weight loss in concrete mixes attributed to acid and chemical attacks with increased replacement of IOT as compared to conventional concrete showed minimal negative impact on durable characteristics. It is suggested that IOT can be utilized as a fine aggregate substitute in concrete to reduce environmental issues, cost, and depletion of natural resources.