Why in news?
A road section built by the Central Road Research Institute (CRRI) and Bharat Petroleum Corporation Limited (BPCL) using geocell reinforcement made from processed plastic waste has been recognised by the India Book of Records and Asia Book of Records. The project demonstrates how end‑of‑life plastics can be transformed into materials that improve road strength and promote a circular economy.
Background
Geocells are three‑dimensional honeycomb‑like structures made from polymers such as high‑density polyethylene (HDPE). When expanded and filled with soil, aggregate or recycled materials, they create a cellular confinement system that spreads loads and stabilises weak subgrades. Geocells were originally developed for the US Army to build temporary roads over soft ground. Today they are used worldwide for road foundations, slope and channel protection, retaining walls and rail beds. Replacing virgin polymers with processed waste plastic helps divert waste from landfills and reduces the carbon footprint.
Main features of the CRRI–BPCL project
- Waste‑plastic geocells: Engineers produced geocell panels from reclaimed plastic packaging, providing a durable yet flexible grid for road construction.
- Improved load bearing: When filled with soil and aggregates, the geocells distribute traffic loads, reduce rutting and extend pavement life. They also allow the use of marginal soils, lowering the need for fresh quarried materials.
- Sustainability and recognition: The project supports circular economy principles by turning waste into infrastructure. Both the India and Asia record books recognised the road as the first to use plastic‑based geocells in this way.
- Future potential: Geocells could be scaled up across India’s highway network to reduce plastic pollution, cut construction costs and enhance road performance. Researchers are studying long‑term durability and developing standards for mass adoption.
Sources
PIB.