Additive Manufacturing of Cementitious Materials

Additive manufacturing of cementitious materials encompasses a suite of digital fabrication techniques that deposit cement‐based pastes, mortars or concretes layer by layer to create structural and architectural components without traditional formwork. By integrating computer‐aided design with automated extrusion systems, this approach affords unprecedented geometric freedom, material efficiency and rapid on‐site production. Central challenges include tailoring fresh‐state rheology to ensure pumpability, extrudability and shape retention while achieving sufficient early strength to support successive layers. In the hardened state, control of interlayer bonding, fracture toughness and long‐term durability is critical. Advances in material formulation—ranging from Portland cement blends to geopolymers and calcined‐clay systems—have expanded the palette of viable binders, enhancing sustainability and reducing embodied carbon. At the system level, robotics, real‐time monitoring and machine‐learning‐assisted process optimisation are streamlining the translation from digital model to built environment. Together, these developments point towards a future in which bespoke structural elements and entire dwellings can be produced on demand, with reduced waste, lower labour intensity and new avenues for design complexity.

Research from Nature Portfolio

Recent studies have demonstrated the potential of nature‐inspired architectures to enhance the mechanical resilience of printed cementitious elements. By implementing a bilayer, helically interwoven “double‐bouligand” pattern, researchers used a two‐component robotic extrusion system to fabricate large‐scale architected concrete that exhibits a non‐brittle response and a rising resistance‐curve under crack propagation. The interlocking bilayer structure promotes crack deflection and shielding, delivering up to a 63 percent increase in fracture toughness compared to cast counterparts. This work not only underscores the importance of bio‐mimetic design in additive processes but also establishes a framework for integrating complex material architectures at construction scale.

Additive Manufacturing of Cementitious Materials publication trend

The graph below shows the total number of articles in additive manufacturing of cementitious materials across all publications each year (not limited to Nature Index journals).

Technical terms

Additive manufacturing: Layer-by-layer fabrication of objects directly from digital models without traditional formwork.

Cementitious material: A binder, such as Portland cement or alternative systems, that hardens by chemical reaction with water.

Rheology: Study of flow and deformation characteristics of fresh pastes under applied stress.

Thixotropy: Time-dependent reduction in viscosity under shear and recovery at rest, crucial for shape retention.

Bouligand architecture: Helical, layered fibre arrangement that enhances toughness and crack‐deflection capacities.

Geopolymer: Alkali-activated binder system based on aluminosilicate sources, offering lower carbon intensity.

Viscosity-modifying admixture (VMA): Additive that increases yield stress and structural build-up without compromising pumpability.

References

1. Tough double-bouligand architected concrete enabled by robotic additive manufacturing. Nature Communications (2024).
2. Development of alternative cementitious binders for 3D printing applications: A critical review of progress, advantages and challenges. Composites Part B Engineering (2023).
3. Revolutionizing affordable housing in Africa: A comprehensive technical and sustainability study of 3D-printing technology. Sustainable Cities and Society (2024).
4. Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture. Cement and Concrete Research (2020).