FAST READ
- Steel slag road technology can reduce construction cost by around 40%.
- It can deliver about four times the strength of conventional roads in cited applications.
- A 1.85-km Raigarh road received a Guinness World Record.
WHY IN NEWS
- On 12 September 2026, CSIR-CRRI and Jindal Steel showcased a record steel-slag road at Raigarh.
- The technology links industrial-waste utilisation, circular economy, infrastructure durability and lower demand for natural aggregates.
TOP DATA & FACTS
- PIB release date: 12 September 2026.
- Claimed construction-cost reduction: around 40%.
- Claimed strength: about 4 times conventional roads.
- Indicative major-maintenance interval: nearly 15 years in suitable applications.
- Raigarh record road length: 1.85 km.
- Location: Raigarh, Chhattisgarh.
- Next Odisha scale-up cited: 40 km.
- 40 km is about 21.6 times the 1.85-km record length.
- Technology developer: CSIR-Central Road Research Institute.
- Industry partner: Jindal Steel Limited.
- A Technology Transfer Agreement was signed.
- New product/brand launched: Steel Grit.
- Core feedstock: processed steel slag.
- The approach advances at least 2 objectives: waste utilisation and road construction.
- Potential users include at least 4 groups: highways, railways, States and private infrastructure builders.
- Maintenance-cycle claim is about 15 years in suitable applications, compared with more frequent intervention on conventional stretches.
- Scale comparison: the proposed 40-km Odisha road is 38.15 km longer than the 1.85-km Raigarh record road.
PRELIMS
- Steel slag is an industrial by-product of steelmaking.
- Processed slag can substitute part of conventional road aggregates when it meets engineering standards.
- Waste-to-wealth does not remove the need for leachability and lifecycle assessment.
QUICK REVISION
- PIB release date: 12 September 2026.
- Claimed construction-cost reduction: around 40%.
- Claimed strength: about 4 times conventional roads.
- Indicative major-maintenance interval: nearly 15 years in suitable applications.
- Raigarh record road length: 1.85 km.
- Location: Raigarh, Chhattisgarh.