The Concrete Additive Construction project at ARC-Lab focuses on developing in-house fibrous concrete mixes suitable for additive construction applications with moderate slopes, such as pyramid-shaped structures. These fibrous mixes enhance the structural integrity and durability of printed concrete layers, allowing for stable construction on inclined surfaces. By optimizing fiber content and mix proportions, ARC-Lab aims to achieve reliable and efficient 3D printing of complex geometries, expanding the potential of concrete additive manufacturing in architectural and structural applications.