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/cm 2. Bricks of wet compressive strength in the range of 80–150 kg/cm 2 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.