Effect of glass powder as partial fine aggregate replacement on properties of basalt fibre reinforced concrete

Abstract

Abstract High strength concrete is finding application in many structures in the past few years. In order to achieve concrete possessing high strength, various materials have been added to it that has superior durable properties. In order to increase the flexural strength in concrete, fibres are added to make it high strength. The use of several fibres in the making of such concrete and their advantages has been discussed in this work. The fibre obtained from basalt rocks known as basalt fibre is used in concrete in recent years and have attracted a lot of attention. In this paper, glass powder is used as a replacement for fine aggregate while basalt fibre is added to improve the mechanical properties of concrete. In order to attain the desired strength in concrete, the quantity of glass powder replacing the fine aggregate as well as the dosage of basalt fibres to be added are investigated. Test conducted in laboratory show that a 10% replacement of glass powder increased the strength and possessed good durability properties compared to conventional concrete. Compressive strength of 84.5 MPa, flexural strength of 11 MPa and split tensile strength of 3.2 MPa was achieved. The durability properties in terms of sorptivity and chloride penetrability were also found to be good compared to the conventional mix.