Experimental Study on Iron Ore Tailings and Bottom Ash as Fine Aggregates in Concrete

Abstract

Iron ore tailings (IOT) are waste produced during mining of iron from its ore. Thus sustainable handling of iron ore tailings is of prime concern to all stakeholders who are into iron ore mining. Bottom ash is the waste material, which drops into the bottom of the furnace in latest large thermal power plants. The consumption and demand of construction materials has resulted in the extraction of sand from rivers. The extraction of sand is having adverse effects on rivers, causing degradation of rivers. Hence, in this thesis the effectiveness of iron ore tailings and bottom ash as fine aggregates in concrete is taken for study. Initially replacement of fine aggregate with 10%, 20%, 30%, 40% and 50% iron ore tailings was done. Then replacement of fine aggregate with 10%, 20%, 30%, 40% and 50% bottom ash was also done. The fresh and hardened state properties of concrete in both cases were studied and compared. The various tests have done include slump test, compacting factor test, compressive strength test, split tensile strength test and flexural strength test.