Leveraging incinerator bottom ash for mitigating early age shrinkage in 3D printed engineered cementitious composites

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

Cement & concrete composites Pub Date : 2025-01-14 DOI:10.1016/j.cemconcomp.2025.105933

Jie Yu , Fengming Xu , Hanghua Zhang , Junhong Ye , Jiangtao Yu , Jian-Guo Dai , Yiwei Weng

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Abstract

This study investigates the use of incinerator bottom ash (IBA) as a supplementary cementitious material to mitigate early age shrinkage in 3D printed engineered cementitious composites (3DP-ECC). IBA was processed through milling and thermal treatment before incorporation into 3DP-ECC. The fresh and hardened properties, hydration kinetics and products, early age shrinkage, and microstructural characteristics of 3DP-ECC with IBA were evaluated. Results indicate that pre-treated IBA reduces autogenous shrinkage and plastic shrinkage by 56 % and 30 %, respectively. The substitution of IBA increases the volume fraction of macropores (>1000 nm) of 3DP-ECC at 3 days and 7 days by approximately 300 % and 500 %, respectively, alleviating early age shrinkage. Sustainability analysis reveals that the incorporation of IBA can reduce the normalized embodied energy and carbon footprint of 3DP-ECC by over 17 %. These findings provide a promising approach to utilizing waste materials in mitigating early age shrinkage in 3DP-ECC towards sustainable digital construction.

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利用焚化炉底灰减轻 3D 打印工程水泥基复合材料的早期龄期收缩

本研究调查了焚化炉底灰（IBA）作为补充胶凝材料的使用情况，以减轻三维打印工程胶凝复合材料（3DP-ECC）的早期龄期收缩。在将焚烧炉底灰加入 3DP-ECC 之前，先对其进行研磨和热处理。评估了含有 IBA 的 3DP-ECC 的新鲜和硬化性能、水化动力学和产物、早期龄期收缩以及微观结构特征。结果表明，预处理 IBA 可使自生收缩率和塑性收缩率分别降低 56% 和 30%。取代 IBA 后，3DP-ECC 在 3 天和 7 天时的大孔体积分数（1000 nm）分别增加了约 300 % 和 500 %，从而缓解了早期龄期收缩。可持续性分析表明，加入 IBA 可使 3DP-ECC 的归一化内含能源和碳足迹减少 17% 以上。这些研究结果为利用废弃材料缓解 3DP-ECC 早期收缩提供了一种可行的方法，从而实现可持续的数字建筑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.