Performance Analysis of Rehabilitated Flexible Pavements

Abstract

The growth of population and traffic has become nearly indispensable, necessitating constant newlinerehabilitation and maintenance of pavements which is impacting on government resources. newlineOften deterioration of roads is due to lack of confinement. Focusing on rehabilitation strategies newlinethat prioritize pavements- based on feasible approach of confinement, cost-effectiveness, newlineperformance study on materials, methods and sufficient case studies on pavement failures can newlinebe beneficial. Soil stabilization techniques such as reinforcing subgrade/subbase layers using newlinemany geosynthetics, geocells (for 3D confinement), rubbers, and plastics are gaining newlinepopularity. These techniques are proven to reduce lateral deformation and settlement thus newlineenhancing the shear resistance, sustainability, and durability of pavements. The disposal of newlinewaste tyres and plastic by burning is a serious issue. In response, an innovative idea has newlineemerged to use waste tyres as a replacement of geoells for 3D confinement calling it as newline GoeTyre Technology. Additionally, the use of waste plastic and polyethylene as moisture newlinearresting layer in flexible pavement construction has been proposed. The research also newlineemphasizes analyzing the root cause of failure and performance of unconfined and confined newlinerehabilitated pavements. The study was carried out through finite element analysis using newline ANSYS software, as well as laboratory, and field experiments. The results are promising and newlinesuggest the use waste tyres for 3D confinement, along with a 125-micron polyethylene newlineimpervious layer, as part of modified pavement crust design for flexible pavements. newlineFurthermore, a thermo-geo plastic (TGP) a composite material is proposed as a pothole filler newlinefor flexible pavements offering a cost-effective solution. These recommendations also address newlinethe issue of disposal of waste tyres and plastic disposal in an ecofriendly and cost-effective newlinemanner. Therefore, there is significant potential to adopt these innovative techniques to newlinestrengthen the flexible pavements while being both ec