This report is written in response to a call for a design proposal to enhance current engineering processes in concrete construction. It aims to introduce Sika, a global leader in construction chemicals and material solutions, to an innovative enhancement for their robotic arm-based 3D concrete printer, the integration of a CO₂ pump system to improve the strength and sustainability of printed concrete.
Sika’s robotic 3D concrete printing technology has redefined modern construction, offering faster, more efficient, and highly customizable building solutions. This automated system eliminates traditional formwork, reduces material waste, and enables the creation of complex architectural structures with precision (Sika Singapore, n.d.). However, further advancements in material composition and curing techniques can enhance both the mechanical performance and environmental sustainability of 3D-printed concrete.
One promising approach to achieving stronger, more sustainable concrete is the integration of a CO₂ pump system. Research conducted by Nanyang Technological University (NTU) has demonstrated that CO₂ mineralization can enhance concrete strength while permanently capturing carbon dioxide within the cement matrix (Nanyang Technological University, n.d.-a). By injecting controlled amounts of CO₂ into the mix, mineral carbonation occurs, forming calcium carbonate within the concrete structure. This accelerates curing, improves durability, and reduces porosity, leading to a stronger, more resilient printed structure.
Beyond structural benefits, this innovation contributes to carbon reduction efforts within the built environment. According to the Rocky Mountain Institute (2021), carbon sequestration techniques in concrete production can significantly reduce emissions and enhance sustainability. With the construction industry seeking low-carbon, high-performance solutions, integrating a CO₂ pump system into Sika’s 3D printing technology presents an opportunity to align with global sustainability goals.
This report will provide an overview of Sika’s current 3D printing technology, discuss the potential benefits and feasibility of CO₂ integration, and outline a proposal for further research and development. By adopting this innovation, Sika can further pioneer sustainable, high-performance concrete solutions, reinforcing its role as a leader in cutting-edge construction technologies.
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