This textbook introduces the fundamentals, properties, functions, design, and applications of geosynthetics in civil engineering. It explains the characteristics of polymer-based geosynthetic materials and provides guidance on their selection, design, durability, and use in engineering applications.

The book covers the principal functions of geosynthetics, including separation, filtration, reinforcement, drainage, and containment. It examines their use in geotechnical, transportation, environmental, hydraulic, mining, and infrastructure engineering, with applications to soil stabilization, erosion control, drainage, and ground improvement.

Examples and applications include roads and highways, railways, embankments, dams, landfills, reinforced soil structures, and slope stabilization. The book also considers the role of geosynthetics in reducing material requirements, improving construction performance, and addressing environmental and sustainability considerations in infrastructure projects.

Combining fundamental concepts with design considerations and engineering applications, the textbook is intended primarily for undergraduate and postgraduate students in civil and geotechnical engineering. It will also be useful to engineers and practitioners seeking an introduction to the selection and application of geosynthetic materials.

Dr. J. N. Mandal is Emeritus Fellow Professor in the Department of Civil Engineering at IIT Bombay, specializing in geotechnical engineering. He received his Ph.D. from IIT Kharagpur in 1982. His research interests include sustainable geotechnical engineering, geosynthetics, centrifuge modelling, ground improvement, waste and nanomaterials, and environmental geotechnics. He founded the Indian chapter of the International Geosynthetics Society in 1988 and established the Sustainable Geosynthetics Research and Testing Laboratory at IIT Bombay in 1985. His work over more than 40 years has encompassed research, education, and applications of geosynthetics and geotechnical engineering. Dr. Mandal has authored/co-authored approximately 612 papers on Geosynthetics and Geotechnical topics in referred International/ national journals/ conferences/ reports/ discussions/ reviews.

Dr. Sushovan Dutta is Assistant Professor in the Department of Civil Engineering at the National Institute of Technology Durgapur. He holds a Ph.D. and M.Tech. in Geotechnical Engineering from IIT Bombay and a B.Tech. in Construction Engineering from Jadavpur University. His research interests include slope stability, ground improvement, geosynthetics, soil stabilization, and numerical modelling. He holds three granted patents and has published more than 25 research publications, including journal papers, conference papers, and book chapters. His research also includes a project funded by the Department of Science & Technology and Biotechnology, Government of West Bengal.

Dr. Purnanand P. Savoikar is Professor in the Department of Civil Engineering at Goa Engineering College, where he has served as Professor since 2014. He has also served as visiting faculty at IIT Goa and NIT Goa. He received his Ph.D. in Geotechnical Earthquake Engineering from IIT Bombay in 2009. His experience spans academic teaching and engineering practice. He is a Life Fellow of the Indian Geotechnical Society and the Institution of Engineers (India). He has published more than 200 research papers and co-authored three books, including Geotechnical Characteristics of Soils and Rocks in India. His academic activities include doctoral, postgraduate, and undergraduate research supervision.