1.Abstract This study provides an insight into the reuse of Recycled aggregate (RA), pulverized fly ash (PFA), and slag in construction. Due to the rapid increase in the construction of buildings, roads, bridges, the earth's natural resources are significantly reducing day by day. Also, the by-products (Fly Ash) of some industries produced pollution, which adversely affects our environment. Construction and demolition waste also become an Issue in Pakistan. One solution…