Design and Analysis of Stabilized Soil Layers for Sustainable Pavement Using IITPave Software

This study explores the stabilization of lateritic soil for flexible pavement construction using RBI Grade 81 and Pond Ash as sustainable additives. Lateritic soil was partially replaced with RBI Grade 81 in varying proportions (2% to 10%, in 2% increments) and combined with a constant 10% Pond Ash. Comprehensive laboratory tests were conducted to assess the physical and chemical properties of the materials, as well as the mechanical characteristics of the stabilized mixes. Tests included grain size distribution, Atterberg limits, compaction (optimum moisture content and maximum dry density), California Bearing Ratio (CBR), and Unconfined Compressive Strength (UCS). The analysis identified the optimum mix composition that maximized strength, durability, and load-bearing capacity. Using this mix, a flexible pavement structure was designed with IITPave software, incorporating traffic and environmental considerations. The design was compared with Indian Roads Congress (IRC) guidelines to evaluate its effectiveness and highlight potential improvements in design methodology. The results demonstrate the efficacy of using RBI Grade 81 and Pond Ash as sustainable alternatives for soil stabilization, reducing reliance on conventional materials and promoting eco-friendly pavement solutions. This study provides valuable insights into the behavior of stabilized layers and their application in sustainable infrastructure development.