Performance evaluation of model flexible pavements on different subgrades with industrial wastes

Abstract

viii newlineABSTRACT newlineDesign for flexible road work is majorly dependent on the behaviour of subgrade and newlineit acts as the foundation for the entire pavement model. So, great care should to be newlinetaken in the performance and design analysis of pavement construction. The newlineexpansive soils are very rich in percentage of silt and clay - the soil subgrade is to be newlinestabilized or compacted before laying a flexible pavement. Stabilization for this type newlineof soils can be achieved by replacing subgrade soil with other material. The current newlineutilization of fly ash is about 55%, which is an industrial waste. The fly ash can be newlineproperly utilized by replacing it in subgrade along with bitumen coated chicken mesh at newlinedifferent percentages and different layers of chicken mesh placement. Implementation newlineof additional reinforcement in the form of bitumen coated chicken mesh improves the newlineCalifornia bearing ratio to a better extent. In this work, fly ash samples are impacted to newlinetheir maximum dry density with optimum moisture content and is adopted with and newlinewithout chicken mesh layers, bitumen coated bamboo meshes in the CBR mould. newlineChicken mesh dimensions equal to the plan view of CBR mould. It was placed in the newlinepreparations of 1,2,3,4 layers and later chicken mesh is placed in all layers. CBR newlinevalues are calculated in the lab and the maximum value of CBR at 15% replacement newlineof fly ash with bitumen coated chicken mesh at four layers is exhibiting high strength newlineproperties. So, in order to reduce the moisture content in the soil, partial replacement newlineof plastic waste is utilized. In this work, plastic wastes are added at different newlinepercentages and the values of UCS, CBR, MDD, OMC are calculated and compared newlinewith the unmodified soil. newline