The civil engineering sector is responsible for 40% of energy consumption and 36% of CO2 emissions in the EU and Construction and demolition waste (CDW) accounts for approximately 25% - 30% of all waste generated in the EU. This project proposes to develop new 3D printed materials with lower carbon emissions and improved thermal efficiency. The new compositions, developed specifically for additive manufacturing using alternative binders and specific additives, reduce cement content and improve thermal efficiency. The research, conducted in collaboration with industrial partners, intends to make 3D printing a viable and sustainable solution for the construction sector. Buildings using these new solutions have lower energy demands and provide higher thermal comfort for its occupants.