Geopolymer binders, having high mechanical performance and associated low carbon dioxide (CO₂) emission, are a promising alternative to Portland cement. However, the brittle fracture of geopolymer matrices may cause catastrophic failure. In this context, seeking to unite the concepts of textile concrete technology and additive manufacturing, this work proposes the development of composites of geopolymer matrices (casted) reinforced with homogeneous or graded PETG meshes (printed). Composites were submitted to the notched prism bending test. The homogeneous reinforcement (volumetric polymer content of 4.75%) and the graded (volumetric polymer content of 3.34%) produced an increase in toughness of 47- and 52-fold, respectively, in addition to conserving the maximum load supported and the critical tension factor of the composites. The gradation of the meshes made it possible to reduce the volumetric content of the reinforcement material without compromising the mechanical performance of the composites. The results show the applicability of 3D printing concepts in the production of printed reinforcements for cementitious matrices.

具有高机械性能和相关的低二氧化碳（CO ₂）排放，是波特兰水泥的有希望的替代品。但是，地聚合物基质的脆性断裂可能会导致灾难性的破坏。在这种情况下，为使纺织混凝土技术和增材制造的概念统一起来，这项工作提出了开发用均质或渐变PETG网（印刷）增强的地聚合物基质（浇铸）的复合材料。将复合材料进行带缺口的棱镜弯曲测试。均质增强材料（体积聚合物含量为4.75％）和渐变材料（体积聚合物含量为3.34％），除了保持最大负载和临界拉伸系数外，还分别使韧性提高了47倍和52倍。复合材料。网格的渐变使得可以在不损害复合材料的机械性能的情况下减少增强材料的体积含量。结果表明3D打印概念在水泥基印刷增强材料的生产中的适用性。