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A 1.85-km road at Raigarh, Chhattisgarh, built by CSIR-Central Road Research Institute with Jindal Steel, won the Guinness World Record for the 'World's Longest Road Built with Processed Steel Slag Aggregates'.
The technology turns steel slag, a steel-making by-product, into road aggregates; the Minister said it can cut construction cost by about 40% and give four times the strength of conventional roads.
CSIR-CRRI and Jindal Steel signed a Technology Transfer Agreement and launched the 'Steel Grit' brand.
CSIR-CRRI has a work order for a 40-km steel slag road from Jindal Steel's Angul plant in Odisha.
Slag is the rock-like residue left when impurities are removed from molten steel (e.g. LD/BOF slag, EAF slag). Once crushed, aged and quality-controlled, it replaces quarried stone aggregate in road layers.
Simple Analogy: Using a factory's leftovers instead of blasting new stone out of a hill.
India's first steel slag road at Hazira, Surat (Gujarat), with ArcelorMittal Nippon Steel India - a six-lane road linking the industrial area to Hazira Port
NH-66 Mumbai-Goa Highway: about 80,000 tonnes of slag processed into aggregates for a 1-km, four-lane section
Heavy-duty roads in Arunachal Pradesh, including the strategic border region
1.1-km road inside Hazira Port linking the multi-purpose berth to the coal yard
1.85-km Guinness record road, Raigarh
40-km road for Jindal Steel's Angul plant, Odisha
National lab for road and transport research, founded 1952; developed the steel slag road technology and its processing and quality-control protocols
Autonomous society under the Department of Scientific and Industrial Research (Ministry of Science & Technology), founded 26 September 1942; 37 national labs. The Prime Minister is its President.
Find, validate and deploy technologies that turn waste into energy, materials and resources
Key: One of the nine science missions of PM-STIAC (Prime Minister's Science, Technology and Innovation Advisory Council), run by the Office of the Principal Scientific Adviser; described as the 'scientific arm' of Swachh Bharat Mission
Promote formal, scientific metal scrapping centres and a circular economy in steel
Key: Issued by the Ministry of Steel on 6 November 2019; built on the 6Rs - Reduce, Reuse, Recycle, Recover, Redesign, Remanufacture
Use waste plastic in bituminous road surfaces
Key: Mandatory since 2015 for renewal work within 50 km of urban areas with a population of 5 lakh or more; February 2023 guidelines extended it to NH service roads, slip roads and surface relaying
GS Paper 3 > Science and Technology / Environment > Waste Management
General Awareness > Science and Technology > Records and Firsts
In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?
Answer: Waste-to-energy technologies
Steel slag can be the material for which of the following? 1. Construction of base road 2. Improvement of agricultural soil 3. Production of cement Select the correct answer using the code given below:
Answer: 1, 2 and 3
Consider the following statements: Statement I: Circular economy reduces the emissions of greenhouse gases. Statement II: Circular economy reduces the use of raw materials as inputs. Statement III: Circular economy reduces wastage in the production process. Which one of the following is correct in respect of the above statements?
Answer: Both Statement II and Statement III are correct and both of them explain Statement I
Steel slag uses were asked in UPSC Prelims 2020.
By-product of steel making; reusable as road aggregate, cement raw material and soil conditioner
Central Road Research Institute, New Delhi (1952), developer of steel slag road technology
PM's Science, Technology and Innovation Advisory Council; Waste to Wealth is one of its nine missions
Reduce, Reuse, Recycle, Recover, Redesign, Remanufacture - basis of the Steel Scrap Recycling Policy 2019