用于3D混凝土打印的可回收材料和轻质绝缘添加剂混合物。

IF 3.2 3区 材料科学 Q3 CHEMISTRY, PHYSICAL
Materials Pub Date : 2025-09-19 DOI:10.3390/ma18184387
Marcin Maroszek, Magdalena Rudziewicz, Karina Rusin-Żurek, Izabela Hager, Marek Hebda
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引用次数: 0

摘要

三维混凝土打印(3DCP)正在迅速发展,但其可持续采用需要与循环经济原则保持一致。本研究评估了用再生组分、3DCP废料、砖屑、玻璃碎料、混合碎石、粉煤灰和矿渣替代天然骨料,以及使用轻质填料(膨胀珍珠岩、轻质膨胀粘土骨料(LECA)和膨胀聚苯乙烯(EPS))来降低密度和提高保温性能。关键性能,如粒度分布,印刷性,机械性能,导热性和吸水性,被确定。结果表明,分级对混合料的性能影响很大。窄级配(粉煤灰、碾磨后的3DCP废料)提高了可挤压性,而宽级配(玻璃、碎石、矿渣)增加了用水需求和挤压风险。尽管存在这些差异,但所有系统都保持在可打印窗口内:流动传播减少了大多数回收添加剂(砖最低),增加了玻璃。机械反应与成分有关。典型的弯曲强度下降。抗压强度受益于更宽的等级,由于改进了填料,更换等级可提高强度约6%。观察到典型的三维cp加载各向异性,垂直加载的抗压强度比平行加载高13%。轻质填料显著降低导热系数。LECA提供了强度和绝缘性之间的最佳折衷,珍珠岩表现出中间行为,EPS的导热系数最低,但由于基质-EPS界面较弱,导致强度损失明显。再生骨料混合物的吸水率下降,而轻质体系,特别是珍珠岩,保持了较高的吸收率。结果表明,非反应性再生骨料和轻质绝缘填料可以成功地集成到基于挤出的3DCP中,而不会影响打印性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recycled Materials and Lightweight Insulating Additions to Mixtures for 3D Concrete Printing.

Three-dimensional concrete printing (3DCP) is advancing rapidly, yet its sustainable adoption requires alignment with circular-economy principles. This study evaluates the substitution of natural aggregates with recycled constituents, 3DCP waste, brick debris, glass cullet, mixed rubble, fly ash, and slag, and the use of lightweight fillers (expanded perlite, lightweight expanded clay aggregate (LECA), and expanded polystyrene (EPS)) to reduce density and improve insulation. Key properties, such as particle-size distribution, printability, mechanical performance, thermal conductivity, and water absorption, were determined. Results indicate that grading strongly affected mixture behavior. Narrow distributions (fly ash, milled 3DCP waste) enhanced extrudability, while broader gradings (glass, rubble, slag) increased water demand and extrusion risks. Despite these differences, all systems remained within the printable window: flow spread decreased with most recycled additions (lowest for brick) and increased with glass. Mechanical responses were composition-dependent. Flexural strength typically decreased. Compressive strength benefited from broader gradings, with replacement levels up to ~6% enhancing strength due to improved packing. Loading anisotropy typical of 3DCP was observed, with perpendicular compressive strength reaching up to 13% higher values than parallel loading. Lightweight fillers significantly reduced thermal conductivity. LECA provided the best compromise between strength and insulation, perlite showed intermediate behavior, and EPS achieved the lowest thermal conductivity but induced significant strength penalties due to weak matrix-EPS interfaces. Water absorption decreased in recycled-aggregate mixes, whereas lightweight systems, particularly with perlite, retained higher uptake. The results demonstrate that non-reactive recycled aggregates and lightweight insulating fillers can be successfully integrated into extrusion-based 3DCP without compromising printability.

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来源期刊
Materials
Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
5.80
自引率
14.70%
发文量
7753
审稿时长
1.2 months
期刊介绍: Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.
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