The characteristics of the soil sub grade which serves has the foundation have a significant for the entire payment impact on the design of a flexible pavement as a result, the performance and design analysis of pavement construction must be done with great care. Because the shrink swell soils are high in silt and clay content the soil sub grade must be stabilized compacted before laying a flexible pavement Subgrade soil can be replaced with other materials to stabilize this types of soils, The current utilization rate of fly ash, which is an industrial waste, is around 58%fly ash can be properly utilized by replacing it in the sub grade with bitumen coated poultry netting in various percentage and layers of poultry netting placement. Therefore, flyash is added as a partial substitute for the purpose of stabilization and An addition of bitumen coated poultry netting is inserted at 4 distinct layers in the subgrade, where it has found to be stabilized with the ideal moisture content and maximum dry density when compared to the soil that hasn’t been treated the prepared subgrade is seen to have high CBR value.

Subgrade, Flyash, Stabilization ,Shrink Swell soils, Poultry netting, CBR Value