2026-02-07 シンガポール国立大学（NUS）
In collaboration with partners from the Built Environment industry, NUS researchers brought novel 3D concrete printing technologies to real-world construction. This results in faster project delivery, less reliance on labour, lower carbon footprint and greater flexibility in modular buildings designed.
＜関連情報＞
- https://news.nus.edu.sg/advancing-sustainable-3d-concrete-printing-for-the-construction-industry/
- https://www.sciencedirect.com/science/article/abs/pii/S0950061826003314
低炭素コンクリート添加剤製造用の高容量ガラス粉末セメント材料 High-volume glass powder cementitious material for low-carbon concrete additive manufacturing
Shin Hau Bong, Yasong Zhao, Yangyunzhi Gao, Hongjian Du
Construction and Building Materials Available online: 30 January 2026
DOI:https://doi.org/10.1016/j.conbuildmat.2026.145431
Highlights
- Waste glass is upcycled for value-added applications in additive manufacturing.
- 60 % cement is replaced by the finely ground waste glass powder.
- The compressive strength can exceed 50 MPa at 28-day.
- The developed mixture has a low carbon intensity index of 4.36 kg CO2/m3·MPa.
- The developed mixture has a finer microstructure and higher resistance to chloride.
Abstract
This study aims to develop a 3D printable low-carbon cementitious material by incorporating high volume (60 % by weight) of waste glass powder (GP) for additive manufacturing applications in the construction and building industry. The influences of high-volume GP replacement on rheological properties and printing performance were evaluated. The mechanical strengths and chloride penetration resistance of the developed 3D printable high-volume GP mixture were evaluated by testing 3D printed specimens in different directions and compared with the control mixture (without GP). The results showed that replacing high volume of ordinary Portland cement (OPC) with GP significantly reduced static yield stress, while slightly enhancing the viscosity recovery. The high-volume GP mixture can still demonstrate comparable printing performance to the control mixture when an identical dosage of viscosity modifying agent was used. Compressive strength tests revealed that the GP mixture exhibited lower 28-day strength than the control mixture due to the slower pozzolanic reactions of GP. Despite this, the GP mixture showed significantly lower embodied energy (by 44 %) and carbon dioxide emissions (by 52 %), along with higher carbon efficiency than the control mixture. Moreover, the superior chloride penetration resistance of the GP mixture suggests an extended service life, further enhancing its environmental benefits.
