One of the main targets of worldwide environmental policies is to reduce landfilled waste volumes. One way to achieve this reduction is by re-using waste materials. In geotechnical engineering, waste material is re-used on ground improvement techniques as a cost-effective and sustainable solution. These soil stabilization techniques include the use of recycled glass-crushed rock blends for pavement sub-base and recycled shredded scrap tires as a light-weight fill material. When construction waste material is re-used in the construction industry (road or rail embankments), it is essential to properly test its mechanical behavior and its environmental performance to ensure the project’s sustainability.