India's first cement concrete steel slag road is currently under construction on National Highway 66, about 50 km outside Mumbai. Located near the JSW Cement factory in Dolvi, Maharashtra, the 1-kilometer road is being constructed using steel slag along with cement slag.
The two organizations behind the project, the Central Road Research Institute (CRRI) and the Council of Scientific and Industrial Research (CSIR), say that for every 1 ton of steel produced, 200 kg of steel slag is produced. It is said that India currently produces 19mt of steel slag every year, and 140MT of slag stands unused. According to estimates, India will produce 60 million tons of steel slag every year by 2030.
Satish Pandey, scientist of SIR-CRRI and inventor of steel slag road technology, said, “The processed steel slag aggregate and cement slag for this road were provided by JSW. So there is no natural aggregate used to make this way. In other words, the construction cost of this road is less and cement made of natural aggregate is more durable than concrete road. By using this technology, we can reduce the impact on air, land and water."
Censors were placed on the road to collect data and monitor its performance. This will then be used to improve the methodology of road building elsewhere. The National High Authority of India (NHAI) is already considering using this technology to build thousands of kilometers of roads under Bharatmala Pariyojana, a road development ecosystem that includes tunnels, bridges, sidewalks, overpasses, intersections and ring roads.
Mr. A Shrivastava, District Officer of NHAI (Mumbai), said, "There are a lot of environmental problems in the country. In this initiative we have made with CRRI, we are trying to replace natural aggregate by using waste material in the steel industry. We have always had good results so far. We are looking forward to using and developing this technology in different projects."