Performance of Sustainable Road Pavements Founded on Clay Subgrades Treated with Eco-Friendly Cementitious Materials

Clays encountered during road construction are mostly weak and result in major pavement failures due to their low California bearing ratio (CBR) high swelling potential. In this study, sustainable eco-friendly waste materials including brick dust (BDW), ground granulated blastfurnance slag (GGBS), recycled plastic (RP) glass (RG) at varying proportions of 11.75% 23.5% were used as partial replacement for cement lime clay treatment. After determining the water content by conducting Atterberg limit compaction test, A CBR swell characteristics treated untreated also conducted. design was conducted using Design Manual Road Bridges (DMRB) a guide determine performance with values. failure analysis understand defect formation within structures supported clay. The embodied carbon calculated life cycle cost (LCCA) flexible imported results show liquid 131.26 28.74 plasticity index (clay 1) 274.07 45.38 extremely 2). An increase values from 8% 9% 57% 97% reduction 4.11% 5.03% 0.38% 0.56% recorded. This resulted thickness stresses leading reduced susceptibility fatigue, rutting permanent deformation. Very recorded (LCC) removed replaced compared materials. study concluded that overall costs can be construction. Owners operators save money when is instead removing replacing it