In order to remove the loose materials, the process of hacking the concrete thoroughly is done
. Water is given on the hollow form. Now, the mixture of chippings and cement is prepared in order to form a good consistency. The raked out areas are then flourished with this paste. This process is done in layers before the filling of the void. The process of the curing it continues for at least one week and finally the required and best possible finish is applied to the concrete surface to get the best possible results in the concrete work.