硅酸盐通报2026，Vol.45Issue(6)：1914-1923,10.DOI:10.16552/j.cnki.issn1001-1625.2025.1282
3D打印混凝土力学各向异性及孔隙演化机理
Mechanical Anisotropy and Pore Evolution Mechanism of 3D Printed Concrete
摘要
Abstract
3D printed concrete(3DPC)faces challenges regarding anisotropy and interlayer weakness,which limit its structural applications.This study investigated the intrinsic correlations between buildability,mechanical behavior,and pore structure of 3DPC through macro-micro scale analysis.Firstly,a material system suitable for extrusion was designed.Furthermore,X-ray computed tomography(X-CT)and digital image correlation(DIC)were employed to quantitatively analyze pore characteristics and their influence on damage evolution.The results show that 3DPC has excellent thixotropy and buildability,and achieves 19 layers of continuous stacking without collapse in ultimate buildability tests.DIC analysis reveals significant anisotropy in crack evolution:X-direction loading causes cracks to propagate upwards and downwards from the edges,Y-direction loading shows bottom-up propagation,while Z-direction loading induces 45° shear failure along the interlayer interface.Microscopic analysis confirms that the complex irregular pores and interlayer interfaces within 3DPC are the sources of crack initiation.This study not only validates the printing performance of the material but also provides a basis for revealing the damage mechanism and achieving crack precise control in 3DPC.关键词
3D打印混凝土/孔隙结构/可建造性/抗压强度/各向异性/裂缝Key words
3D printed concrete/pore structure/buildability/compressive strength/anisotropy/crack分类
建筑与水利引用本文复制引用
马莲霞,刘超,陈伟,朱文轩,赵维飞,杨秋菊..3D打印混凝土力学各向异性及孔隙演化机理[J].硅酸盐通报,2026,45(6):1914-1923,10.基金项目
新疆维吾尔自治区科学技术厅"天山英才"培养计划科技创新领军人才项目(2023TSYCLJ0056) （2023TSYCLJ0056）
