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Raigarh Steel Slag Road Sets Guinness World Record in India

A 1.85-km road built with processed steel slag at Raigarh in Chhattisgarh won a Guinness World Record, cutting construction cost by about 40 per cent.

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Raigarh Steel Slag Road Sets Guinness World Record in India

Why in News

On 12 September 2026 the Guinness World Record for the world's longest road built with processed steel slag aggregates was conferred for a 1.85-km road at Raigarh in Chhattisgarh, built by CSIR-CRRI with Jindal Steel Limited.

India has set a Guinness World Record for the world's longest road built with processed steel slag aggregates. The road runs 1.85 km at Raigarh in Chhattisgarh. It was built jointly by the CSIR-Central Road Research Institute of New Delhi and Jindal Steel Limited. The record was conferred at an event on 12 September 2026. Union Minister of State (Independent Charge) for Science and Technology and Earth Sciences, Dr Jitendra Singh, spoke at the ceremony.

What steel slag road technology does

Steel slag is a by-product left behind when steel is made. The technology processes that waste into aggregates fit for road building. Dr Jitendra Singh said the method can cut the cost of building a road by about 40 per cent. He said such a road carries four times the strength of a conventional road. He said major maintenance may be needed only after about 15 years in suitable applications. He linked the work to the Prime Minister's call to turn waste into wealth.

Key figures

RecordWorld's Longest Road Built with Processed Steel Slag Aggregates
Length and place1.85 km at Raigarh, Chhattisgarh
Built byCSIR-CRRI, New Delhi, with Jindal Steel Limited
Cost savingAbout 40 per cent
StrengthFour times that of a conventional road
Maintenance cycleMajor maintenance only after about 15 years
Next projectA 40-km road in Odisha, from Jindal Steel's Angul plant

Where the technology has already travelled

The first big demonstration was at Hazira in Gujarat, on a six-lane road to Hazira Port. The technology then reached the NH-66 Mumbai-Goa Highway, where about 80,000 tonnes of steel slag were turned into processed aggregates for a one-kilometre, four-lane stretch. It was used for heavy-duty roads in Arunachal Pradesh, including a strategic border area. A 1.1-km slag road was also laid inside Hazira Port.

What was announced at the event

The programme saw the virtual inauguration of the record road. A scientific documentary was released. A Technology Transfer Agreement was signed between CSIR-CRRI and Jindal Steel. The Steel Grit brand was launched. Dr N. Kalaiselvi, Secretary of DSIR and Director General of CSIR, said the achievement comes as CSIR prepares to enter its 85th year. She announced that CSIR-CRRI has received a work order for a 40-km road in Odisha from Jindal Steel's Angul plant. Naveen Jindal, Member of Parliament and Chairman of Jindal Steel, was among those present.

Important Facts

RecordGuinness World Record for the World's Longest Road Built with Processed Steel Slag Aggregates
Length and location1.85 km, Raigarh, Chhattisgarh
PartnersCSIR-Central Road Research Institute, New Delhi, and Jindal Steel Limited
Minister at the eventDr Jitendra Singh, MoS (Independent Charge) for Science and Technology and Earth Sciences
Cost savingAbout 40 per cent lower construction cost
StrengthFour times that of a conventional road
MaintenanceMajor maintenance only after about 15 years
Brand launchedSteel Grit
Next projectA 40-km road in Odisha from Jindal Steel's Angul plant
Earlier applicationAbout 80,000 tonnes of slag used on an NH-66 Mumbai-Goa Highway stretch
CSIR milestoneThe organisation is entering its 85th year, said DG Dr N. Kalaiselvi

Exam Point of View

Remember the record and its exact wording, the length (1.85 km) and place (Raigarh, Chhattisgarh), the two partners (CSIR-CRRI and Jindal Steel), the three performance claims of 40 per cent lower cost, four times strength and 15-year maintenance cycle, the 'Steel Grit' brand, and the next project of 40 km in Odisha from the Angul plant.

Practice Questions

Q1.Science & TechnologyMedium

The Guinness World Record for the world's longest road built with processed steel slag aggregates was set at which place?

  1. A.Angul, Odisha
  2. B.Raigarh, Chhattisgarh
  3. C.Hazira, Gujarat
  4. D.Bhilai, Chhattisgarh
Show answer

Correct answer: B. Raigarh, Chhattisgarh

Explanation

The correct answer is Raigarh, Chhattisgarh. The record road runs 1.85 km and was pursued jointly by the CSIR-Central Road Research Institute of New Delhi and Jindal Steel Limited, with the record conferred at an event addressed by Dr Jitendra Singh. Option A, Angul in Odisha, is a genuine part of the story but belongs to the next stage: CSIR-CRRI has received a work order for a 40-km road in Odisha from the Jindal Steel plant there, which is meant to take the technology well beyond the present record. Option C, Hazira in Gujarat, is where the technology was first demonstrated on a six-lane road to the port, and a 1.1-km slag road was later laid inside Hazira Port itself, but neither is the record stretch. Option D, Bhilai, is a well-known steel town used here only as a distractor. Keep the record with Raigarh and the future project with Angul.

Q2.Science & TechnologyMedium

According to Dr Jitendra Singh, steel slag road technology can reduce road construction cost by roughly how much?

  1. A.10 per cent
  2. B.25 per cent
  3. C.40 per cent
  4. D.60 per cent
Show answer

Correct answer: C. 40 per cent

Explanation

The correct answer is 40 per cent. The Minister said the technology can cut construction cost by around this share while delivering four times the strength of a conventional road, and can stretch the maintenance cycle so that major maintenance is needed only after about fifteen years in suitable applications. He described the result as a breakthrough not only for road engineering but for the wider infrastructure economy, since it saves money and conserves natural aggregates obtained through mining and quarrying at the same time. The other options are simply higher or lower shares offered to test whether the candidate has the exact figure. The three claims travel together in question papers, so it is worth memorising them as a set: about forty per cent cheaper, four times stronger, and maintenance pushed to about fifteen years.

Q3.Science & TechnologyHard

Which two institutions jointly pursued the record road and signed a Technology Transfer Agreement at the event?

  1. A.CSIR-CRRI and Jindal Steel Limited
  2. B.IIT Roorkee and Steel Authority of India Limited
  3. C.CSIR-NML and Tata Steel
  4. D.NHAI and Rashtriya Ispat Nigam Limited
Show answer

Correct answer: A. CSIR-CRRI and Jindal Steel Limited

Explanation

The correct answer is CSIR-CRRI and Jindal Steel Limited. The CSIR-Central Road Research Institute in New Delhi supplied the scientific guidelines, processing protocols and quality-control framework, while the steel company supplied the processed slag and the site. At the same programme the road was inaugurated virtually, a scientific documentary was released, the Steel Grit brand was launched and the Technology Transfer Agreement between the two was signed. Dr N. Kalaiselvi, Secretary of DSIR and Director General of CSIR, said the achievement comes as the organisation enters its eighty-fifth year, and announced the work order for a 40-km road in Odisha from the company's Angul plant. Options B, C and D pair real research bodies and steel producers that were not the partners in this record, and are included precisely because each combination sounds plausible to a candidate who recalls only that a laboratory and a steel firm were involved.

Frequently Asked Questions

Where is the record-setting steel slag road located?

At Raigarh in Chhattisgarh. The 1.85-km stretch is the world's longest road built with processed steel slag aggregates.

How much can steel slag road technology save on construction cost?

About 40 per cent, said Dr Jitendra Singh, while also giving four times the strength of a conventional road and pushing major maintenance to about 15 years.

Which institutions built the record road?

CSIR-Central Road Research Institute, New Delhi, together with Jindal Steel Limited. The two also signed a Technology Transfer Agreement at the event.

Sources