Review paper on strength analysis of fibre blended landfill liner

Landfill liner systems play a vital role in preventing the migration of leachate into surrounding soil and groundwater. Conventional compacted clay liners, although widely used, often suffer from low tensile strength, brittleness, and cracking due to shrinkage and desiccation. To overcome these limitations, fibre reinforcement has emerged as an effective and sustainable soil stabilization technique. This study focuses on the strength analysis of fibre blended landfill liner material using randomly distributed polyethylene fibres mixed with clayey soil. Laboratory investigations were conducted to evaluate the effect of fibre content on the mechanical behaviour of the liner material. Tests such as the Standard Proctor compaction test, Unconfined Compressive Strength (UCS) test, and Direct Shear test were performed on soil samples with varying fibre percentages. The results indicate that the inclusion of fibres significantly improves the shear strength, ductility, and post-failure behaviour of the liner. An optimum fibre content was observed beyond which no substantial improvement in strength was achieved. The improved strength characteristics of fibre blended liners reduce the risk of cracking and structural failure, thereby enhancing the durability and performance of landfill containment systems. Hence, fibre reinforced compacted clay liners can be considered a feasible, eco-friendly, and cost-effective alternative to traditional landfill liner materials.