Research Information System
Black Sea Journal of Engineering and Science, vol.9, no.1, pp.226-237, 2026 (TRDizin)
In the pursuit of low-carbon 3D-printed housing, this study investigates the environmental viability of 3D-printed housing made with alkali-activated binder (AAB) mortar, in comparison to conventional ordinary Portland cement (OPC) systems. A life cycle assessment (LCA) was conducted using a BIM-integrated framework, evaluating both mortar-level (A1–A3) and full building-level (A1–A5) impacts across four categories: global warming potential (GWP), acidification potential (AP), eutrophication potential (EP), and ozone depletion potential (ODP). At the material scale, the AAB mortar demonstrated around 77% lower GWP and significant reductions in AP and EP (by ~60% and ~66%, respectively) compared to OPC. These advantages are maintained and even amplified at the building scale. A 3D-printed AAB house showed a GWP of 6.52E+06 kg CO2-eq, significantly lower than the OPC house’s 2.85E+07 kg CO2-eq, while also cutting AP and EP by over 59% and 66%, respectively. These improvements stem from replacing clinker-based OPC with CDW-derived, low-carbon binders, significantly curbing emissions from production. However, the AAB system exhibited a higher ODP (0.749 kg CFC-11-eq), over four times that of the OPC house (0.166 kg CFC-11-eq), mainly due to sodium silicate and NaOH production. Contribution analysis confirmed that over 95% of all impacts stemmed from material production, affirming the critical role of binder formulation. This study confirms that AAB-integrated 3D printing can enable rapid, circular, and significantly decarbonized construction. Still, further optimization of activator chemistry is needed to fully align AAB systems with environmental sustainability targets.