This current investigation was conducted to improve performance of traditional pavement by reusing/utilizing industrial waste materials in bituminous concrete mixtures for flexible pavements, thereby promoting waste management practices. The optimum mix was found to be at 3% L.D.P.E. with 4% W.E.O., &5% crumb rubber, and having bitumen percentage content of 4.5%. A higher content of waste incorporationwas found to enhance brittleness and deformation. This study assessed the optimalmixes or optimal mix ratios for their dissemination, brittleness, ductility, and specific gravity characteristics. Best/optimal results were identifiedwhile using ratios of 3% L.D.P.E., 4% W.E.O., &5.0% C.R. with 4.5% bitumen. This ratio was found to result leading to a max. stability of 730.5 kg & 17.25 of flow rate. Thesefindingssuggest that industrial waste can be successfully blended with bituminous construction mixes thereby improving pavement performance and supporting waste management at parallel. Thus reusing industrial waste materials in bituminous construction mixes in optimal ratios can lead to better pavement performance in comparison to traditional pavement but for that the exact ratios must first be calculated for obtaining desired characteristics.

This study explored the use of Rice Husk Ash (RHA) and lime as soil stabilizers for subgrade soil. RHA, a by-product of rice milling, poses environmental hazards if improperly disposed of. The optimal RHA content for subgrade stabilization is 15%, combined with 3% lime. The research found that RHA not only improves subgrade properties but also mitigates environmental pollution and offers a cost-effective stabilization method. The study evaluated engineering properties like plasticity index, maximum dry density (MDD), optimum moisture content (OMC), and California Bearing Ratio (CBR). Results showed a significant decrease in plasticity index and an increase in MDD with RHA addition up to 15%. However, further increase in RHA content led to a decrease in MDD. The combination of 15% RHA and 3% lime exhibited the highest CBR improvement (61.48%), indicating enhanced soil strength. This research suggests that RHA may be a sustainable and cost-effective subgrade stabilization material that improves pavement performance and waste utilization. RHA is abundant, easy to obtain, and economical as compared to cement as a soil stabilizer, reducing disposal issues and environmental impact.