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采用废料和有机人造骨料制成的环保型3D打印混凝土。

Eco-Friendly 3D-Printed Concrete Made with Waste and Organic Artificial Aggregates.

作者信息

Butkutė Karolina, Vaitkevičius Vitoldas, Adomaitytė Fausta

机构信息

Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Studentų g. 48, 51367 Kaunas, Lithuania.

出版信息

Materials (Basel). 2024 Jul 3;17(13):3290. doi: 10.3390/ma17133290.

DOI:10.3390/ma17133290
PMID:38998375
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11243148/
Abstract

In this research, the results of an experimental study on the use of three alternative components for creating artificial aggregates (AAs) (granules) and their usage in 3D-printed concrete (3DPC) are examined. This study combines AAs made from organic components like hemp shives (HSs), pyrolyzed coal (charcoal), waste/municipal solid waste incinerator bottom slag (BS), and a mix of a reference 3DPC with the aforementioned AAs. Particularly, to enhance these properties to make low-carbon 3DPC, in this research, the potential of using AAs as lightweight aggregates was increased to 14% in terms of the mass of the concrete. Each mix was tested in terms of its printability via a preliminary test in a 3D printing laboratory. For an additional comparison with the aforementioned cases, 3DPC was mixed with unprocessed hemp shives, charcoal, and BS. Furthermore, their strength was measured at 28 days, and lastly, their durability parameters and shrinkage were experimentally investigated. Cross-sections of the fragments were studied under a scanning electron microscope. In this study, we achieved improvements in the mechanical properties of AAs for their development and implementation as an innovative way to reduce carbon in 3DPC.

摘要

在本研究中，考察了使用三种替代成分制备人造骨料（AA）（颗粒）及其在3D打印混凝土（3DPC）中的应用的实验研究结果。本研究将由有机成分如大麻屑（HS）、热解煤（木炭）、废物/城市固体废物焚烧炉底渣（BS）制成的AA与参考3DPC与上述AA的混合物相结合。特别是，为了增强这些性能以制造低碳3DPC，在本研究中，将AA作为轻质骨料的使用潜力提高到混凝土质量的14%。通过在3D打印实验室进行的初步测试，对每种混合物的可打印性进行了测试。为了与上述情况进行额外比较，将3DPC与未加工的大麻屑、木炭和BS混合。此外，在28天时测量了它们的强度，最后，对它们的耐久性参数和收缩进行了实验研究。在扫描电子显微镜下研究了碎片的横截面。在本研究中，我们在AA的力学性能方面取得了改进，以将其作为减少3DPC中碳的创新方法进行开发和应用。

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