Enhancing mechanical properties of concrete with 3D printed vascular networks via carbonation strengthening

IF 10.8 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Yuanyuan Zhang , Pengrui Lu , Guohao Fang , Biqin Dong , Shuxian Hong , Yanshuai Wang , Jing Li , Shengxin Fan
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引用次数: 0

Abstract

Vascular systems offer promising potential for enabling self-recovery in cementitious materials, but their construction in three dimensions presents significant challenges. Our group has developed an embedded printing strategy allowing for the freeform construction of 3D hollow vascular channels, overcoming previous limitations. However, concerns persist regarding the weakening of mechanical properties caused by these vascular channels. In this study, we utilize carbon dioxide curing to reinforce the vascular wall, mitigating the mechanical loss associated with hollow vascular channel. We investigate the effect of carbonation on the vascular channel wall's morphology, composition, and microhardness along the radial direction to gain insight into its impact. Additionally, we analyze the influence of both vascular channels and carbonated vascular channels on intensity and cracking behaviors under various loading directions. The findings from this investigation provide essential insights for the design and optimization of vascular networks in concrete structures.
通过碳化强化三维打印血管网增强混凝土的力学性能
血管系统为实现水泥基材料的自我恢复提供了广阔的前景,但其三维构造却面临着巨大的挑战。我们的研究小组开发了一种嵌入式打印策略,可以自由构建三维中空血管通道,克服了以往的局限性。然而,人们仍然担心这些血管通道会削弱机械性能。在这项研究中,我们利用二氧化碳固化来加固血管壁,减轻与中空血管通道相关的机械性能损失。我们沿径向研究了碳化对血管通道壁形态、成分和显微硬度的影响,以深入了解其影响。此外,我们还分析了维管束通道和碳化维管束通道在不同加载方向下对强度和开裂行为的影响。这些研究结果为混凝土结构中维管束网络的设计和优化提供了重要启示。
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来源期刊
Cement & concrete composites
Cement & concrete composites 工程技术-材料科学:复合
CiteScore
18.70
自引率
11.40%
发文量
459
审稿时长
65 days
期刊介绍: Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.
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