Abstract: 

CEC3D is an innovative 3D-printable cement-based mortar that combines mechanical performance and durability with a substantial reduction in carbon footprint. Based on a sustainable ternary blend, it replaces over 50% of traditional Portland cement with locally sourced waste materials, making it an eco-friendly solution for next-generation construction.

Background: 

The construction industry is under increasing pressure to reduce its environmental impact, as traditional Portland cement production accounts for nearly 8% of global CO₂ emissions. At the same time, 3D concrete printing is emerging as a transformative solution for faster, more efficient, and customized building processes. However, current material formulations struggle to balance printability, structural performance, and sustainability, creating a clear need for an advanced, eco-efficient alternatives.

Benefits: 

The technological core streghts relly on exceptional performance across multiple critical parameters, achieving high compressive strength over 50 MPa at 28 days—while replacing over 50% of Portland cement compared to the mere 0-20% replacement found in conventional 3D printing mortars. This substantial cement substitution results in a dramatically reduced carbon footprint of 377-395 kg CO₂/m³, while the formulation's reliance on abundant local materials ensures consistent availability unlike imported supplementary cementitious materials (SCMs) that suffer from limited regional access.

Potential comercial use/applications: 

The mortar formulation can be selled as dry mortar and used for structural and non-structural elements in residential, commercial, and industrial projects, Prefabricated building components, customized construction solutions, allowing complex designs and optimized material use.

Co-owners: 
University of Porto