土木工程与管理学报2025，Vol.42Issue(2)：55-61,7.DOI:10.13579/j.cnki.2095-0985.2025.20240341
PVA与后处理对粉末3D打印水泥基材料协同增强效应
Synergetic Enhancement Effect of PVA and Post-treatment on Powder Bed 3D Printing Cementitious Material
摘要
Abstract
Powder bed 3D printing technology using cementitious material has the advantages of high forming accuracy and good material durability,providing a new means for high precision and free forming of building components.In view of the problem of low strength of 3D printing cementitious ma-terials,an enhancement method of dissolving and impregnating PVA powder is proposed.The influ-ence laws of PVA powder content and post-treatment methods on the accuracy,strength and micro-structure of 3D printing cementitious materials are studied.The results show that PVA powder improves the printing accuracy of specimens.When the PVA content is 5％,the dimensional error of specimens is less than 2％in x,y and z directions.The compressive strength of the specimens is ef-fectively improved by the post-treatment of underwater curing and then high temperature drying.The compressive strength of the specimens without PVA powder is increased by 506.67％at most.The post-treatment and the internal PVA powder lead to a synergistic enhancement effect.PVA powder dissolves in water to form PVA solution,which fills the pores of the specimens.After the high-temper-ature solidification of PVA,the compressive strength of 5％PVA specimens is increased by 708.33％at most.This study provides a novel approach to enhance the mechanical properties of powder bed 3D printing cementitious materials.关键词
3D打印水泥基材料/粉末3D打印/力学性能/后处理方法Key words
3D printing cementitious material/powder bed 3D printing/mechanical property/post-treatment分类
土木建筑引用本文复制引用
王凯旋,王里,李之建..PVA与后处理对粉末3D打印水泥基材料协同增强效应[J].土木工程与管理学报,2025,42(2):55-61,7.基金项目
国家自然科学基金青年项目(52108205) （52108205）
