This post is also available in:
עברית (Hebrew)
Researchers at Nanyang Technological University (NTU) Singapore have introduced a groundbreaking 3D concrete printing method that captures and stores carbon dioxide (CO₂), offering a promising solution to the construction industry’s environmental challenges. This innovative technology not only improves the strength and efficiency of 3D-printed concrete but also addresses the high carbon emissions associated with traditional cement production. The research was published in Carbon Capture Science & Technology.
According to Interesting Engineering, the novel process works by incorporating CO₂ and steam—byproducts of industrial operations—into the concrete mix during the 3D printing process. As the concrete is printed, the CO₂ reacts with the mix, forming a stable compound that becomes trapped within the structure. The addition of steam enhances the CO₂ absorption, improving the concrete’s overall strength. Lab tests have confirmed that this technique produces concrete that is stronger and more durable than conventional 3D-printed materials while capturing and storing significantly more CO₂.
Cement production accounts for a significant amount of global CO₂ emissions. The NTU method offers a more sustainable alternative, reducing material usage, construction time, and labor requirements. The team found that the new concrete mix showed a 50% improvement in printability, leading to faster and more precise construction. Additionally, the material demonstrated up to 36.8% greater compressive strength and 45.3% higher bending strength than standard 3D-printed concrete.
Professor Tan Ming Jen, principal investigator of the study, highlighted the broader impact of the technology, explaining that by using CO₂ produced by power plants or other industries, we could reduce the environmental impact of the construction sector while also improving the mechanical properties of concrete.
The researchers explained that this development arrives at a critical time, as industries worldwide race to meet climate change targets. NTU researchers have filed a joint US patent for the technology and are focused on optimizing the printing process and exploring the use of waste gases to further enhance the system’s environmental benefits.
