Effects of Eggshell as a filler material on various bituminous mix: A review

As the world gets innovative, people are finding different applications of waste by-products instead of using the age-old tradition of burning and land-filling techniques. These techniques also help in achieving better air & water quality and as a whole in achieving a greener environment. Using waste materials to construct pavement have been one of the new ways to reduce construction cost and one of which is using of eggshell as modifier. Applying modifiers in the asphalt mix improves the overall pavement performance and this is one way of partially replacing the Portland cement in the mix. The study evaluated the sustainable performance obtained by adding eggshells in varying rate, keeping in mind the optimum bitumen content (OBC) along with optimum eggshell content (OESC) and the OESC turned out to be at the range of 3% to 5% in most of the studies showing favourable conditions in terms of stability, flow, VFB, VTM, density etc. However, many research works have been undertaken in this field but with less practical application.