3D打印生土建筑技术研究进展

Advances in 3D Printing Raw Soil Construction Technology

3D打印技术的潜在建造优势对推动建筑工业化具有重要意义,将其应用到生土建筑中是目前国内外关注和研究的重点之一。首先从3D打印生土原材料的组成、生土满足3D打印需要的流变性、生土干燥引起的收缩开裂等方面综述了3D打印生土原材料的制备技术,总结了生土从打印喷嘴的可挤出性、可打印的最大高度,分析了喷嘴形状和尺寸、打印速度和路径等工艺参数对3D打印生土成型的影响,重点综述了3D打印生土硬化后的抗压强度、层间黏结强度的研究现状,最后介绍了3D打印生土建筑技术面临的问题以及对未来的展望,为3D打印生土建筑技术的研究与发展提供参考。

The potential construction advantages of 3D printing technology are of great significance to promote the building industrialization,and its application to raw soil construction is one of the focuses of attention and research at home and abroad.Firstly,the preparation technology of 3D printing raw soil was reviewed from the aspects of the composition of 3D printing raw materials,the rheology of raw soil to meet the requirements of 3D printing,and the shrinkage and cracking caused by drying of raw soil.The extrudability and maximum height of raw soil from the printing nozzle were summarized.The influence of process parameters such as nozzle shape and size,printing speed and path on the molding of 3D printing raw soil was analyzed.This paper mainly summarized the research status of compressive strength and interlayer bond strength of 3D printed raw soil after hardening,and finally introduced the problems faced by 3D printing raw soil construction technology and the prospect of the future,which could provide a reference for the research and development of 3D printing raw soil construction technology.