--- title: "Enhancing Road Infrastructure in Yadgir, Karnataka with Ocean LDPE Liner – 300 Micron" date: 2025-04-11 author: "Sales Team" url: https://oceangeosynthetics.com/road-infrastructure-ldpe-liner-300-micron/ --- April 11, 2025 | [Case Studies](https://oceangeosynthetics.com/category/case-studies/) # Enhancing Road Infrastructure in Yadgir, Karnataka with Ocean LDPE Liner – 300 Micron For a road project in Yadgir, Karnataka, Ocean Non Wovens supplied and installed 33,000 SQM of Ocean [LDPE Liner](https://oceangeosynthetics.com/products/ocean-geomembrane/low-density-polyethylene-ldpe-sheets/) – 300 Micron. The liner was laid over the compacted subgrade as a moisture barrier, to keep water out of the expansive black cotton soil beneath the road and protect the pavement above it. It is one of several [geosynthetics](https://oceangeosynthetics.com/category/geosynthetics/) used to deal with problem soils in road work. Ocean also supplied 33,000 sq m of Ocean Geocell for the same road. ## Project Overview - **Client**: Bheema Fine Chemicals - **Location**: Yadgir, Karnataka - **Products Used**: Ocean LDPE Liner – 300 Micron and Ocean Geocell - **Quantity Supplied**: 33,000 SQM of LDPE liner and 33,000 sq m of geocell - **Purpose**: Soil stabilisation, moisture barrier and subgrade protection beneath the road layers ## The challenge: black cotton soil Much of Yadgir district sits on black cotton soil, a clay that swells when wet and shrinks and cracks as it dries. A road built on it moves with the seasons, which leads to: - Frequent cracking of the road surface - Soft, unstable subgrade in the rainy season - A shorter pavement life The damage comes from changes in the soil’s moisture content. Keeping water from getting into the subgrade, and keeping its moisture steadier through the year, reduces the swelling and shrinking. That is the job the LDPE liner was brought in to do. ## Why an LDPE liner in a road Low-density polyethylene (LDPE) liners are flexible, lightweight [geomembranes](https://oceangeosynthetics.com/products/ocean-geomembrane/). At 300 micron (0.3 mm), the sheet is thin and pliable enough to lay quickly over large areas while still forming a continuous waterproof layer. Under a road it works as: 1. **Moisture barrier**: it cuts off water seeping down from above and limits capillary rise from below into the pavement layers. 2. **Subgrade protection**: a subgrade that stays drier keeps more of its strength and swells less. 3. **Lower maintenance**: fewer water-related failures mean fewer repairs. The liner does not add structural strength; load is still carried by the granular and bituminous layers above it. The use of geosynthetics in road pavements, including on poor subgrades, is covered by IRC SP:59-2019 (Guidelines for Use of Geosynthetics in Road Pavements and Associated Works). ## Why the 300 micron grade The **300-micron thickness** was chosen to balance strength and pliability for this project. The liner offers: - **Tensile strength** to take the stresses of placing and compacting aggregate over it - **Chemical resistance**: polyethylene is stable in acidic and alkaline soils - **UV stabilisation** for the period it lies exposed during construction - **Easy installation**: light rolls that a small crew can lay quickly ## Ocean Geocell in the road layers The liner controls moisture, but it carries no load. That is the job of the granular layers, and on a weak, moisture-sensitive subgrade those layers tend to spread sideways and rut under repeated wheel loads. [Ocean Geocell](https://oceangeosynthetics.com/products/geocells/) is a honeycomb of welded HDPE strips that is pulled open on site, filled with granular material and compacted. The cell walls hold the infill in place, so the layer stays compacted and behaves like a stiff mattress that spreads wheel loads over a wider area of subgrade. On roads over expansive clay, geocell is typically used to confine the sub-base or base course above the subgrade, where it reduces rutting and differential movement and can allow locally available fill to do the work of better-graded aggregate. It is also used to hold soil on embankment slopes and shoulders against erosion. The cell height, weld spacing and infill are selected for the traffic and subgrade strength, and the infill is compacted in the cells before the next pavement layer goes on. ## Installation sequence 1. **Site preparation**: the subgrade was levelled and compacted to remove undulations and sharp objects. 2. **Liner deployment**: the 300-micron LDPE liner was unrolled directly over the compacted subgrade. 3. **Overlap and joining**: adjacent sheets were overlapped by 150 mm and heat-welded for a watertight joint. 4. **Cover layers**: a non woven [geotextile](https://oceangeosynthetics.com/products/geotextile-manufacturers/) could be placed over the liner as a cushion where needed, followed by the GSB (granular sub-base) and the remaining road layers. A thin liner needs a few precautions. Leave a little slack when laying so the sheet is not stretched tight as temperatures change, because polyethylene expands and contracts noticeably. Keep plant off the bare sheet and tip the first layer of GSB from the already-covered side. Collect offcuts and packaging and dispose of them properly rather than burying them in the fill. ## What the liner does over the road’s life With the subgrade sealed from seasonal water, a road on black cotton soil should see smaller moisture swings in the subgrade during the monsoon, less of the cracking and rutting typical of expansive clay, and fewer repairs. Prefabricated rolls also lay faster than most conventional moisture-control treatments. Ocean Non Wovens supplies geomembranes and other geosynthetics for roads, reservoirs, [landfills](https://oceangeosynthetics.com/solution/environment-dewatering-landfills/) and railways across India, with technical support on site. More projects are on our [case studies](https://oceangeosynthetics.com/case-studies/) page. Get Ocean Geosynthetics in your Google feed[![](https://oceangeosynthetics.com/wp-content/uploads/2026/07/google-g-logo.svg)Add us as a preferred source on Google](https://www.google.com/preferences/source?q=https://oceangeosynthetics.com/) [![Vadodara-KLM Expressway](https://oceangeosynthetics.com/wp-content/uploads/2025/06/pexels-mahendra-meena-3887023-28146983-scaled-e1750074241950-300x169.jpg)](https://oceangeosynthetics.com/road-durability-boosted-on-vadodara-klm-expressway/) [Case Studies](https://oceangeosynthetics.com/category/case-studies/) [Case Study: Enhancing Road Durability on the Vadodara-KLM Expressway Using Ocean HDPE Geocell ](https://oceangeosynthetics.com/road-durability-boosted-on-vadodara-klm-expressway/) For the Vadodara-KLM Expressway in Gujarat, Ocean Non Wovens supplied 15,000 SQM of Ocean HDPE Geocell (75*712 mm) for ground stabilisation and soil reinforcement under… [See More](https://oceangeosynthetics.com/road-durability-boosted-on-vadodara-klm-expressway/) [![](https://oceangeosynthetics.com/wp-content/uploads/2026/09/Ocean-HDPE-Liner-300x169.webp)](https://oceangeosynthetics.com/hdpe-liner-pet-geotextile-pond-nuh-haryana/) [Case Studies](https://oceangeosynthetics.com/category/case-studies/), [Pond liner](https://oceangeosynthetics.com/category/pond-liner/) [A Pond Built to Hold Every Drop: Ocean HDPE Liner and PET Geotextile at Nuh, Haryana](https://oceangeosynthetics.com/hdpe-liner-pet-geotextile-pond-nuh-haryana/) In a water-scarce district, a pond only earns its cost if it keeps the water it collects. Nuh, in the Mewat region of Haryana, is… [See More](https://oceangeosynthetics.com/hdpe-liner-pet-geotextile-pond-nuh-haryana/) [![Canal Lining: Enhancing Water Management with Ocean Non Wovens Geotextile ](https://oceangeosynthetics.com/wp-content/uploads/2024/06/new-recently-built-highway-brcko-district-bosnia-herzegovina_181624-3266-300x200.jpg)](https://oceangeosynthetics.com/canal-lining-water-ocean-wovens-geotextile/) [Case Studies](https://oceangeosynthetics.com/category/case-studies/) [Canal Lining: Enhancing Water Management with Ocean Non Wovens Geotextile ](https://oceangeosynthetics.com/canal-lining-water-ocean-wovens-geotextile/) Ocean Non Wovens supplied 50,000 sq m of Ocean Non Woven Geotextile 520 GSM for a canal lining project in Champaran, Bihar. 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