Scientists at Nanyang Technological University (NTU) have developed a groundbreaking 3D concrete printing method that captures carbon, significantly contributing to environmental sustainability in the construction industry.

This innovative technique aims to mitigate the substantial carbon emissions from cement production, which is responsible for approximately 1.6 billion metric tonnes of CO2 emissions annually, accounting for about eight percent of global emissions.

By lowering material usage and reducing construction time and labor requirements, the new printing method presents a more sustainable alternative to conventional cement-heavy construction practices.

Co-author Dr. Daniel Tay highlighted the potential for creating stronger, durable structures while simultaneously lowering the carbon footprint of the industry.

First author Lim Sean Gip noted the urgency for such technologies in light of accelerating climate change efforts worldwide, underscoring the need to meet climate change targets.

The findings of this research were published on December 16, 2024, in the journal Carbon Capture Science & Technology.

Notably, this method captures and traps 38% more CO2 than existing 3D printing techniques, enhancing its eco-friendliness.

Tests indicate that injecting captured CO2 and steam into the concrete during printing not only enhances the mechanical properties but also results in a 50% increase in printability, allowing for more efficient and precise shaping of structures.

The research team has filed a US patent application for their innovation, indicating potential for commercialization and future optimization of the process, including exploring the use of waste gases to improve efficiency.

Led by Professor Tan Ming Jen, the research emphasizes that this system not only strengthens concrete but also reduces the construction sector's environmental impact by repurposing industrial CO2 emissions.

This research aligns with global initiatives aimed at reducing carbon emissions and achieving sustainable development goals, demonstrating NTU's commitment to advancing sustainable construction technologies.

Overall, this breakthrough underscores the transformative potential of integrating carbon capture with innovative construction technologies for a sustainable built environment.