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Preparation and microstructural characterization of a novel 3D printable building material composed of copper tailings and iron tailings

机译：铜尾矿和铁尾矿组成的新型3D可印刷建筑材料的制备及微观结构特征

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摘要

This paper proposes an environmentally friendly 3D printable building material composed of copper tailings and iron tailings that matches well with an extrusion-based printing process. The experimental results show that copper tailings and iron tailings have the best compounding effect on mechanical properties at a mass ratio of 1:4. The microstructure and gelation activities of 3D printable building material were characterized by XRD, FTIR and SEM techniques. The research results show that the hydration products of 3D printable building material composed of copper tailings and iron tailings are mainly ettringite and C-S-H gel, which contribute for the development of strength. It is found that the ettringite, C-S-H gels, and cemented crystals are closely connected to form a three-dimensional structure, which makes the matrix more compact, and importantly enhances the mechanical properties of 3D printable building material. Furthermore, the leaching toxicity and radioactivity of 3D printable building material were tested, and the results show that the 3D printable building material composed of copper tailings and iron tailings is environmentally friendly. (C) 2020 Elsevier Ltd. All rights reserved.
机译：本文提出了一种由铜尾矿和铁尾部组成的环保3D可打印建筑材料，其与基于挤出的印刷工艺相匹配。实验结果表明，铜尾矿和铁尾矿在质量比为1：4的机械性能方面具有最佳的复合效果。 XRD，FTIR和SEM技术的特征在于3D可印刷建筑材料的微观结构和凝胶化活性。研究结果表明，由铜尾矿和铁尾矿组成的3D可印刷建筑材料的水合产物主要是Ettringite和C-S-H凝胶，这有助于发展强度。发现Ettringite，C-H凝胶和粘合晶体紧密地形成三维结构，这使得基质更紧凑，重要的是提高3D可印刷建筑材料的机械性能。此外，测试了3D可印刷建筑材料的浸出毒性和放射性，结果表明，由铜尾矿和铁尾矿组成的3D可印刷建筑材料是环保的。 （c）2020 elestvier有限公司保留所有权利。

著录项

  • 来源
    《Construction and Building Materials》 |2020年第jul20期|118779.1-118779.11|共11页
  • 作者

    Li Xinjian; Zhang Na; Yuan Jianbo; Wang Xinke; Zhang Yonghong; Chen Feixu; Zhang Yihe;

  • 作者单位

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

    SinoMstone Technol Corp Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Key Lab Mat Utilizat Nonmetall Minerals & Sch Mat Sci & Technol Natl Lab Mineral Mat Beijing 100083 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    3D printable building material; Copper tailings; Iron tailings; Microstructure; Leaching toxicity;

    机译：3D可印刷建筑材料;铜尾矿;铁尾矿;微观结构;浸出毒性;

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