The current trends in Geotechnical Engineering are moving towards sustainable design and construction. Studies presented in this volume present recent research findings and critically review the existing literature related to assessment of sustainable geomaterials and environmental geotechnics. Special emphasise is given to the material characterization on industry by product or newly developed sustainable materials in geotechnical engineering or pavement engineering. This volume is based on contributions to the 6th GeoChina International Conference on Civil & Transportation Infrastructures: From Engineering to Smart & Green Life Cycle Solutions -- Nanchang, China, 2021.