Vision of 3D printing with concrete - Technical, economic and environmental potentials
Vision of 3D printing with concrete - Technical, economic and environmental potentials
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DOI：
10.1016/j.cemconres.2018.06.001
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发表时间：
2018-10-01
影响因子：
11.4
通讯作者：
Agusti-Juan, Isolda
中科院分区：
文献类型：
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作者：
De Schutter, Geert;Lesage, Karel;Agusti-Juan, Isolda
从技术、经济和环境方面考虑，提出了混凝土3D打印的愿景。尽管世界各地有几个3D打印混凝土结构的展示，但在技术和加工层面仍存在许多挑战。目前可用的高性能水泥基材料不能直接3D打印，因为流变和硬化性能不足。主动流变控制（ARC）和主动硬化控制（ASC）将为3D打印应用提供扩展材料调色板的新方法。从经济角度来看，数字化制造混凝土（DFC）将导致利益相关者和成本结构的变化。虽然目前还不能量化成本结构，但DFC提供了许多潜在的机会来提高施工过程的成本效益。混凝土3D打印对环境的影响必须与结构的形状复杂性有关。实施结构优化以及功能杂交作为设计策略允许仅在结构或功能需要的地方使用材料。这种设计优化增加了形状复杂性，但也减少了DFC中的材料使用。因此，预计对于具有相同功能的结构，与传统生产的混凝土结构相比，DFC在整个使用寿命期间的环境性能更好。
A vision is presented on 3D printing with concrete, considering technical, economic and environmental aspects. Although several showcases of 3D printed concrete structures are available worldwide, many challenges remain at the technical and processing level. Currently available high-performance cement-based materials cannot be directly 3D printed, because of inadequate rheological and stiffening properties. Active rheology control (ARC) and active stiffening control (ASC) will provide new ways of extending the material palette for 3D printing applications. From an economic point of view, digitally manufactured concrete (DFC) will induce changes in the stakeholders as well as in the cost structure. Although it is currently too ambitious to quantitatively present the cost structure, DFC presents many potential opportunities to increase cost-effectiveness of construction processes. The environmental impact of 3D printing with concrete has to be seen in relation to the shape complexity of the structure. Implementing structural optimization as well as functional hybridization as design strategies allows the use of material only where is structurally or functionally needed. This design optimization increases shape complexity, but also reduces material use in DFC. As a result, it is expected that for structures with the same functionality, DFC will environmentally perform better over the entire service life in comparison with conventionally produced concrete structures.