Active rheology control of cementitious materials containing hard magnetic particles: Sustained response after magnetic intervention

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2025-03-06 DOI:10.1016/j.cemconcomp.2025.106024

Yiyuan Zhang , Yi Zhang , Yaxin Tao , Xiaodi Dai , Kim Van Tittelboom , Karel Lesage , Geert De Schutter

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引用次数: 0

Abstract

The performance of responsive cementitious materials after magnetic intervention plays an important role for the application of active rheology control. For example, during 3D concrete printing, the material needs to sustain the increased rheological properties (e.g. yield stress, etc.) after an intervention in the nozzle to guarantee buildability. This research investigates the use of hard magnetic particles to make sure that the responsive cementitious materials sustain their response after a magnetic intervention. The remanent rheological, microstructural and magnetic properties of responsive cementitious materials after a magnetic intervention were studied. Effects of magnetic flux densities (0 T, 0.3 T, and 0.6 T) and magnetic intervention durations (5 s, 60 s, and 180 s) were investigated and compared. Small amplitude oscillation shear (SAOS) tests were performed to determine the rheological properties including yield stress and structural build-up of responsive cementitious materials. The distribution of hard magnetic particles in the magneto-responsive cementitious materials was investigated by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDX). The magnetization of magneto-responsive paste was determined by a vibrating sample magnetometry (VSM). A new type of innovative magneto-responsive cementitious materials was developed, which can sustain a significant magneto-rheological response after the intervention of only a few seconds. The degree of response after a magnetic intervention was heavily influenced by the magnetic flux density instead of intervention duration. The remanent alignment and remanent magnetization of magneto-responsive particles in the cementitious materials were verified and confirmed by experimental results.

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磁性干预后响应性胶凝材料的性能对于主动流变控制的应用具有重要作用。例如，在三维混凝土打印过程中，材料需要在喷嘴干预后保持增加的流变特性（如屈服应力等），以保证可施工性。本研究调查了硬磁性颗粒的使用情况，以确保反应性胶凝材料在磁性干预后保持其反应。研究了磁干预后反应性胶凝材料的残余流变学、微观结构和磁特性。研究并比较了磁通密度（0 T、0.3 T 和 0.6 T）和磁干预持续时间（5 秒、60 秒和 180 秒）的影响。进行了小振幅振荡剪切（SAOS）试验，以确定流变特性，包括反应胶凝材料的屈服应力和结构堆积。利用配备了能量色散 X 射线光谱仪（EDX）的扫描电子显微镜（SEM）研究了磁响应水泥基材料中硬磁性颗粒的分布情况。磁响应浆料的磁化率是通过振动样品磁力计（VSM）测定的。开发出了一种新型创新磁响应胶凝材料，只需几秒钟的干预就能维持显著的磁流变响应。磁干预后的响应程度主要受磁通密度而非干预持续时间的影响。实验结果验证并确认了水泥基材料中磁响应颗粒的剩磁排列和剩磁磁化。

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来源期刊

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.