This book is designed to enrich the preliminary knowledge about soil stabilization and their types. From a long time our society suffering from plastic waste, a lot of plastic is used and dumped and after there is no reuse, it causes several environmental problems. So this book explains that how to utilized waste plastic in construction of sub-surface course of any structure. Several experiments are done with waste plastic strips i.e. C.B.R. test, Permeability of soil, Direct shear test, and it gives better results soil with plastic. Strength of pavement of road is improved after adding plastic strips in various percentage.