3D打印混凝土工作及力学性能研究进展

Research Progress on Working and Mechanical Properties of 3D Printed Concrete

3D打印混凝土因具有无模化、智能化施工的显著优势,应用潜力巨大,已逐渐成为世界各地快速上升的研究热点。目前国内外研究人员已对其工作性能和力学性能展开了研究,前者主要包括流动性、可挤出性和建造性能,后者主要包括抗压强度、抗折强度和层间粘结强度。为此基于国内外3D打印混凝土的研究现状,首先对其工作性能和力学性能展开具体评述,着重介绍了现阶段对此采取的研究方法和获得的研究成果;然后概述了3D打印混凝土在性能研究和实际应用中存在的主要问题,同时针对其普遍存在的抗拉强度低和延性不足问题总结和分析了目前的解决方法,并指出未来的研究方向,有助于推动3D混凝土打印技术的研究和应用。

3 D printed concrete has significant advantages in moldless and intelligent construction and has huge application potential. It has gradually become a rapidly rising research hotspot all over the world. At present, researchers at home and abroad have carried out research on its working and mechanical properties. The former mainly includes flowability, extrudability and buildability performance, while the latter mainly includes compressive strength, flexural strength and interlayer bond strength. Therefore, based on the current research status of 3 D printed concrete at home and abroad, firstly, a specific review of its working properties and mechanical properties was carried out, with a focus on the research methods and research results obtained at this stage. Then, the main problems existing in the performance research and practical application of 3 D printed concrete were summarized. At the same time, the current solutions were summarized and analyzed in view of the problems of low tensile strength and insufficient ductility. The future research direction was also pointed out, which could promote the research and application of 3 D concrete printing technology.