EXPERIMENTAL ANALYSIS OF FLEXIBLE PAVEMENT ROAD LAYERS

Flexible pavements form the backbone of India's road network, serving as vital transportation links for passenger and freight movement.The performance of flexible pavement primarily depends on the strength and stability of its layered system.This paper presents an experimental study on the properties of materials used in each layer of a flexible pavement structure-subgrade, sub-base, base, and bituminous layer.The study aims to determine the mechanical and strength characteristics of each material through laboratory testing.A series of tests such as California Bearing Ratio (CBR), Aggregate Impact Value (AIV), Los Angeles Abrasion (LAA), and Marshall Stability were conducted to evaluate performance.Results indicated that the subgrade soil with a CBR of 8.6% is suitable for medium traffic conditions.Granular materials in sub-base and base layers satisfied MoRTH standards, ensuring proper load transfer.The optimum bitumen content (OBC) of 5.2% yielded a Marshall Stability of 13.7 kN, demonstrating adequate strength and flexibility.The findings highlight that proper material selection, compaction, and layer design contribute significantly to the durability and costefficiency of flexible pavements.