Case Study: HDPE Geomembrane for Commercial Water Reservoirs Jain Gaurav1, Sharma Sanjay2, Halake Kantappa3 1Director - Megaplast India Pvt Ltd, Agarwal Industrial Area, Somnath, Daman, Dadra and Nagar Haveli and Daman and Diu 2Director Operation – Megaplast India Pvt Ltd, Agarwal Industrial Area, Somnath, Daman, Dadra & Nagar Haveli & Daman and Diu 3Sr. Manager – R&D, Megaplast India Pvt Ltd, Agarwal Industrial Area, Somnath, Daman, Dadra & Nagar Haveli & Daman and Diu Online Published on 24 January, 2024. Abstract Geomembranes are widely used in hydraulic applications as barrier liners for gas and fluids. The base materials include polyethylene (PE), polypropylene (PP), polyvinyl chlorides (PVC) and derivatives of them are regularly accommodating worldwide. The PE materials of different density are chosen for modifying the properties of geomembrane. The High-density polyethylene (HDPE) geomembranes are often preferred for hazardous waste landfills, water conservation, waste ponds, etc. Thermal and oxidative degradation of the base polymer changes the molecular level structures and in-service life of polymer. The present case study analyses the final condition of an exhumed HDPE geomembrane sample that was 1.5 mm thick for industrial water storage. The sample was collected after 7 years of service in the slope area water pond which was continuing in field exposure of stored water. The laboratory evaluation was performed based on physical and thermoanalytical performances according to global standard of GRI-GM13. GRI standards are very stringent and are mainly based on the standard certifications of American Standard Test Methods (ASTM). The reduced minutes of OIT demonstrated that the depletion of antioxidants had occurred. The carbon black content (CBC) is in the range of the required minimum standard. This study concludes that a certain number of antioxidants are still available to protect the geomembrane for further service. Top Keywords Antioxidants, Geomembrane, Exhumed, In-service, Pond liner, Etc.. Top |