Reduction In Pavement Thickness Using Geogrid - An Economic Approach For NHAI Project

Abstract

This research examines the National Highways Authority of India (NHAI) seeks cost-effective and sustainable solutions to improve pavement performance while reducing construction costs. This study explores the structural and economic benefits of integrating geogrid reinforcement in flexible pavements, focusing on optimizing layer thickness without compromising strength. Using mechanistic-empirical analysis, the research compares conventional (IRC 37 compliant) and geogrid-reinforced designs, evaluating subgrade strength, traffic loads and material properties. Findings reveal that geogrids can reduce pavement thickness by 15-25%, yielding significant cost savings through material efficiency, faster construction and enhanced longevity. The study advocates geogrid adoption as a sustainable solution, supporting India’s infrastructure development and resource optimization goals.