 In summary, the results of this study suggest that using recycled fibers such as latex, vinyl, and peepee can significantly enhance the mechanical properties of 3D-printed mortar. Furthermore, the use of graphene oxide nanomaterials, cloizite 15A nanoclay, and micro silica fume can further improve the printability of 3D-printed mortar. Additionally, the presence of internal reinforcements such as plain steel wire mesh can increase the composite behavior of printed layers. Overall, the use of recycled fibers and admixtures can reduce CO2 emissions and make 3D printing more sustainable. This article was offered by Sade Sina Musavi and Mehdi Dehestini.