Development of bricks from granulated blast furnace slag

Abstract Investigations have been carried out into the development of bricks from granulated blast furnace slag, a byproduct of the iron and steel industry. The study reveals that good quality bricks can be produced from a slag-lime mixture and sand by pressing the mix at a pressure of 50 kg/cm2. Bricks of wet compressive strength in the range of 80–150 kg/cm2 have been obtained after 28 days of humid curing at ambient temperature. Production of slag based bricks consumes less energy compared to conventional burnt clay bricks or calcium silicate bricks.