As natural geologic materials become scarce, nations around the world are embracing a circular economy perspective to reduce their carbon footprint. This book provides a unique perspective on this shift by highlighting several methods of waste materials recycling for use in civil infrastructure construction and transportation geotechnics. The authors explore innovative and cost-effective solutions to modern-day waste management problems through the use of granular waste materials from mining and mineral processing industries, power plants, steel manufacturing, rubber tyres, and demolished buildings in construction and soft ground stabilisation. This book contains a rich repository of experimental studies conducted on recycled materials and industry byproducts using static and dynamic geotechnical testing, 1:1 scale physical modelling through large-scale process simulation testing, and fully instrumented field monitoring. With fresh insights from international experts, this book will transform transportation infrastructure practices into a new paradigm. This is a valuable resource for academics, practitioners, and postgraduate researchers in the fields of transportation geotechnics, ground improvement, and sustainable infrastructure engineering.