In accordance with the government’s “Waste to Wealth” mission, the state-owned National Highways Authority of India (NHAI) announced on 15th March that it has begun using steel slag in road construction on a trial basis. When molten steel is separated from impurities in steel-making furnaces, steel slag, a by-product of the process, is formed. Copper, steel, and aluminum are just a few of the refined metals found in slag. Slag keeps highways from breaking or changing shape over time because of its durability. Additionally, slag hinders corrosion.
As Per A Statement
In a statement, the NHAI claimed that its initiative would assist in addressing and overcoming the issue of a lack of materials used in the construction of national highways and could replace natural aggregates like sand, gravel, or crushed stone with waste material from the steel industry.
According to the statement, the authority granted Central Road Research Institute (CRRI) permission to build a one km trial patch for PQC of the Panvel – Indapur section of NH 66 close to Mumbai, where 100% natural aggregates were replaced by steel slag-derived aggregates. The patch was built in the Raigarh district. It claimed that the trial’s outcomes had been encouraging.
According to the statement, using such materials in road construction will reduce construction costs, advance the circular economy, and increase resource efficiency.
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