India's Highway Boom and the Corrosion Problem
India's NHAI is on an unprecedented road construction spree. But TMT steel carries a hidden liability: corrosion.
IRC 37 and GFRP Rebar
The Indian Roads Congress published IRC 37 guidelines accommodating FRP bars for road reinforcement. GFRP rebar can now be specified for concrete road slabs, bridge deck overlays, culverts, median barrier walls, and retaining walls.
Why GFRP Makes Sense for Roads
- No corrosion from road salts — GFRP is completely immune
- Lighter slabs — 75% lighter than steel, reducing foundation loads
- Non-conductive — ideal near toll plazas and EV charging infrastructure
- No magnetic interference — does not affect inductive loop traffic detectors
Cost Analysis for Road Applications
For a 4-lane highway over 1km: GFRP material cost ₹38–46 lakh vs TMT ₹47–51 lakh — competitive at material level, before lifecycle savings.
Conclusion
GFRP rebar under IRC guidelines and IS 18256:2023 is ready for mainstream NHAI adoption. RN Elements in Surat supplies highway-grade GFRP with full documentation.
Frequently Asked Questions
RN Elements manufactures GFRP rebar in diameters from 4mm to 32mm — covering 4, 6, 8, 10, 12, 16, 20, 25, and 32mm. Standard lengths are 6m and 12m with custom lengths available.
Yes. Every order is supplied with NABL-accredited third-party test reports confirming compliance with IS 18256:2023 on tensile strength, modulus, alkaline retention, and bond strength.
RN Elements is based at Hojiwala Industrial Estate, Surat, Gujarat. We deliver across India and export to UAE and the Gulf. Gujarat projects get 3–5 day lead time for stock items.
Yes. With IS 18256:2023 and IRC 37 compliance, GFRP rebar can be specified on NHAI, PWD, and other government projects. We provide full documentation for government procurement.
Design service life is 75–100 years in normal concrete environments. International field studies on 30+ year old specimens show no significant degradation, confirming long-term durability.