北京建筑大学学报2025，Vol.41Issue(4)：62-72,11.DOI:10.19740/j.2096-9872.2025.04.08
纤维增强渣土砂3D打印砂浆力学及可打印性能研究
Study on the Mechanical Properties and Printability of Fiber-reinforced 3D-Printed Mortar with Construction Waste Sand
摘要
Abstract
This study uses construction waste sand as fine aggregate and systematically investigates the effects of PP fibers and PVA fibers on the mechanical properties and printability of 3D-printed mortar.The fiber-matrix interface behavior and reinforcement mechanisms are revealed.The results indicate that PVA fibers,due to their hydrophilicity and high elastic modulus,can simultaneously optimize flowability,enhance 28 d strength,and reduce drying shrinkage when the addition ratio is ≤0.75％.PP fibers must be controlled below 0.75％to avoid agglomeration.At the same addition ratio,PVA fibers outperform PP fibers in terms of mechanical strength,inhibition of drying shrinkage,and optimization of pore formation.This study provides technical support for the performance optimization of fiber-reinforced 3D printing mortar with construction waste sand,offers a high-value utilization path for construction waste,thereby contributing to the low-carbon transformation of the construction industry.关键词
渣土砂/3D打印/PP纤维/PVA纤维Key words
construction residue sand/3D printing/PP fiber/PVA fiber分类
建筑与水利引用本文复制引用
周文娟,杨灿,何晓,赵瀚第,周明丽..纤维增强渣土砂3D打印砂浆力学及可打印性能研究[J].北京建筑大学学报,2025,41(4):62-72,11.基金项目
科技部国家重点研发计划项目(2022YFC3803403). （2022YFC3803403）
