Influence of fly ash on the properties of recycled coarse aggregate concrete

The availability of concrete manufacturing materials is the greatest crisis faced by the construction industry these days. The future generations will face terrific problems by digging up and blasting the limited natural resources. So, there is an importance for using the recycled demolition waste and fly ash which are considered as waste materials till years. To decrease the disposal of these materials, reduce the cost and for protection of environment these materials are highly useful. This is an experimental study to inspect the strength of the demolished aggregate and fly ash concrete. The idea is to trim down the amount of demolished concrete waste materials and fly ash going into landfill and discarding pits. Three combinations of M25 grade concrete by replacing demolished aggregate concrete and fly ash in various percentages (0%, 5%, 10%, 15%, and 20%) at 0.48 water/cement ratios were performed. From the experimental study it was proved that the limited applications of demolished recycled coarse aggregate and fly ash is recommended in structural concrete.