An experimental study on reducing the carbon footprint of pervious concrete

Pervious concrete is a special high permeable concrete used for flatwork applications that allow water from precipitation and other sources to permeable through, thereby reducing the runoff from a land and recharging ground water levels. However, concrete is one of the most widely used raw materials used in the world. It is estimate that use of concrete itself contributes 20–30% total global carbon emission. It is highly acknowledged that carbon foot print of concrete must be kept within limit to ensure sustainability. Thus, in the present communication an attempt has been made to design various pervious concrete where in cement is partially replaced by fly ash at various proportion to reduce its carbon foot print. The various properties such as cube compressive strength, porosity, permeability, water permeability and carbon foot print of pervious concrete designed using fly ash were studied. The results indicate that sample D (40% replacement of cement with flay ash) reduced more carbon emission i.e 171.7 kg/m³. Permeability is better for sample A (0% replacement of cement) i.e 16.02 mm/s. also maximum compressive strength is 14.47 Mpa for sample A. The performance indicator calculated indicates that sample E (5% replacement of CA with FA) is comparatively best among all the samples studied followed by Sample B (20% replacement of cement with flyash).