Effect of Glass Powder and Iron Ore Tailings on Strength Properties of Concrete

Abstract

Replacement of cement and fine aggregate in concrete with waste products such as glass powder and iron ore tailings offers technical, economical and environmental advantages. In this experimental investigation glass powder is replaced with cement by 10%, 20% and 30% and iron ore tailings with fine aggregates by 30% which is the optimum percentage. To study the role of glass powder and iron ore tailings combination in concrete, mechanical properties such as compressive strength, flexural strength and splitting tensile strength and durability test such as water absorption test for M40 grade of concrete is carried out for different percentages of glass powder by keeping the iron ore tailings percentage constant at 30%. Replacement of cement with glass powder and sand with IOT increases the strength of concrete. Concrete mix containing 10% glass powder and 30% iron ore tailings showed the higher strength compared to the control mix for 28 days. Flexural strength of concrete mix containing 10% GP and 30% IOT showed higher strength of 5.05 MPa for 28 days. Splitting tensile strength value is also increasing i.e for 10% glass powder and 30% IOT, obtained splitting tensile strength was 4.48 MPa and modulus of elasticity value was has also increased. Water absorption test results showed that there is decrease in water absorption with increase in GP percentage. Workability of concrete tends to decrease with increase in the glass powder content. Compressive strength at 30% of glass powder and 30% iron ore tailings found to decrease. Concrete containing 10% glass powder and 30% IOT showed maximum strength and it is considered as the optimum dosage.