Steel slag road technology from CSIR-Central Road Research InstituteSteel Slag Road technology paves the way for the sustainable and eco-friendly utilisation of 19 million tonne of waste steel slag generated annually in India as solid waste from various steel plants. CSIR-CRRI has pioneered the development of steel slag road technology by constructing the world's first steel slag road in Surat, using processed electric arc furnace steel slag aggregates. These aggregates are produced at Arcelor Mittal Nippon Steel’s Hazira plant under CSIR-CRRI’s technological guidance, through the valorisation of waste steel slag as processed steel slag aggregates. Approximately one lakh tonne of processed steel slag aggregates have been utilised as a 100 per cent substitute for natural aggregates in the construction of this six-lane bituminous steel slag road, including the road median and shoulders. Steel slag roads can be constructed with two-thirds the thickness of conventional roads using natural aggregates under identical design traffic conditions, resulting in a cost savings of 30 to 40 per cent. These steel slag roads can withstand heavy traffic and adverse weather conditions due to their high structural stiffness. They remain pothole-free and do not require structural rehabilitation for an extended period. Approximately 95 per cent of the road volume is built using processed steel slag aggregates, which are around 50 to 60 per cent cheaper than natural aggregates.REJUPAVE from Verma Industries and CSIR-CRRIDeveloped jointly by CSIR-Central Road Research Institute and Verma Industries, REJUPAVE (rejuvenator for bituminous pavement recycling) is an innovative product revolutionising road construction and maintenance in India by effectively recycling distressed bituminous layers in a road structure. In India, where most roads are bituminous pavements, regular resurfacing every three to four years is essential to maintain quality. Traditionally, this involved overlaying distressed pavements with fresh bitumen and aggregates, significantly increasing pavement thickness. In place of this practice, distressed bituminous layers can be milled and reutilised through indigenously developed technology REJUPAVE using a hot recycling process. This can not only lower the cost of maintenance but also conserve the bituminous binder. REJUPAVE employs a bio-oil-based rejuvenator that allows for the hot recycling of up to 70 per cent of reclaimed asphalt pavement material (RAP) in a new bituminous mix for binder and wearing course layers.REJUPAVE utilises a bio-oil-based rejuvenator made from plant-based raw materials, emphasising sustainability, and minimising environmental impact. Its ability to restore the viscoelastic and rheological properties of oxidised bitumen binders enhances pavement performance and longevity, contributing to more durable and resilient road infrastructure.