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3D打印技术是混凝土行业发展的一大机遇,3D打印混凝土技术也必将成为混凝土行业发展的一个重要方向。本文简单介绍了3D打印技术,综述了国内外3D打印混凝土技术与其材料、施工的发展现状与最新进展,指出3D打印混凝土技术目前存在的技术难题,并对3D打印混凝土技术的未来进行展望,提出可能的研究方向。 相似文献
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3D打印技术具有快速成型、无需模具、可精细化制作复杂结构的特点,近年来被应用在建筑行业,来更快更好地完成工程建设。3D打印建筑材料多为水泥基材料,其工作性能和力学性能与普通混凝土有一定的区别。为得到适用于3D打印的混凝土材料,本研究基于3D打印材料的性能指标,利用PVA纤维改善混凝土性能,进一步调整配合比后,最终得出适用于3D打印的早强混凝土材料。 相似文献
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In recent few years, significant improvement has been made in developing largescale 3D printers to accommodate the need of industrial-scale 3D printing. It is of great feasibility to construct structural components and buildings by means of 3D concrete printing. The major issues of this innovative technique focus on the preparation and optimization of concrete materials which possess favourable printable properties as well as the measurement and evaluation methods of their workability. This paper firstly introduces three largescale 3D printing systems that have been successfully applied in construction industry. It then summarizes the commonly used raw materials in concrete manufacturing. Critical factors that should be particularly controlled in material preparation are specified. Easy-extrusive, easy-flowing, well-buildable, proper setting time and low shrinkage are significant for concrete mixture to meet the critical requirements of a freeform construction process. Thereafter, measuring methods that can be employed to assess the fresh and hardened properties of concrete at early stages are suggested. Finally, a few of evaluation methods are presented which may offer certain assistance for optimizing material preparation. The objective of this work is to review current design methodologies and experimental measurement and evaluation methods for 3D printable concrete materials and promote its responsible use with largescale 3D printing technology. 相似文献