A Review on Partial Replacement of Cement by Flyash and Effect of Steel Fibers

Cement is a fine binding material which sets and strengthens when water is supplemented to it. It is largely used in construction with great advantages but cement with its wide range of properties has several disadvantages as well. Manufacturing of cement causes ill effect on environment at all stages of process. These include emissions of pollutantslike dust, gas, noise and vibration. Manufacturing of cement causes emission of the most common greenhouse gas i.e. carbon dioxide, from 5% in cement structures to 8% in case of cement roads. Carbon dioxide is released by cement manufacturing both indirectly (emission of energy) and directly (heating of calcium carbonate). The cement factories produce upto 5% of global artificial CO2 emission. This review paper presents the usage of fly ash by replacement of cement in our general construction. In addition, review of effect of steel fibers on concrete is also done.