Indigenous Bio-Bitumen Technology
Why in News?
Indigenous Bio-Bitumen technology is recently in the news as of March 30, 2026, because the Council of Scientific and Industrial Research (CSIR) held a major technology transfer event to scale up its commercial use.
Development and Process
- Developers: Jointly created by the CSIR-Central Road Research Institute (CRRI) in New Delhi and the CSIR-Indian Institute of Petroleum (IIP) in Dehradun.
- Mechanism (Pyrolysis): The process involves heating post-harvest rice straw (parali) or other biomass at high temperatures in the absence of oxygen to produce bio-oil.
- Upgrading: This bio-oil is chemically upgraded into a bio-binder that possesses the same adhesive and waterproofing properties as petroleum-based bitumen.
Technical Specifications
- Blending Capacity: Research and field trials have shown that 20% to 30% of conventional petroleum-based bitumen can be replaced with bio-bitumen without compromising road durability.
- Performance: The bio-blend offers improved high-temperature stability and greater resistance to "rutting" (indentations from heavy tires) compared to traditional asphalt.
Major Benefits
- Import Substitution: India currently imports nearly half of its annual bitumen requirement. Even a 15% blend can save roughly ₹4,500 crore per year.
- Emissions Reduction: The use of bio-bitumen reduces lifecycle greenhouse gas emissions by approximately 70% compared to traditional fossil-fuel-based methods.
- Waste to Wealth: It creates an economic value for agricultural waste, providing farmers with an additional income stream and incentivizing them to stop field burning.
- Sustainability: It aligns with the Viksit Bharat 2047 vision and India's Net Zero commitments by promoting a circular economy in the infrastructure sector.
Field Demonstrations
- Pilot Success: Successful trial stretches have already been laid on the Jorabat-Shillong Expressway (NH-40) in Meghalaya and parts of NH-44 (Nagpur-Mansar Bypass).
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