摘要
现有研究和相关技术标准多采用观测法检验3D打印材料的打印性能,缺少对可挤出性和可建造性的量化评价指标。本文基于流动度等常规工作性能指标对可打印性能的影响,提出挤出均匀性、累计形变率两个量化指标,用于评价3D打印材料的可打印性能,并在本试验条件下建立常规工作性能指标与打印质量的联系。结果表明:3D打印砂浆的挤出均匀性随流动度的增加先提高后降低,随动态屈服应力的增加而降低;累计形变率随高度保留率的增加而降低,随静态屈服应力的增加而降低。本试验参数条件下,当挤出均匀性小于3.5%、累计变形率不大于6%、动态屈服应力为200~800 Pa、静态屈服应力为1800~3300 Pa时,砂浆打印层数较高(不小于30层),可打印性能较好。
Observational methods are widely used to assess the printing performance of 3D printing materials in current research and technical standards,lacking of quantitative evaluation for extrudability and constructability.In this paper,based on the influences of conventional working performance indicators such as fluidity on printability,two quantitative indicators of extrusion uniformity and cumulative deformation rate were proposed to evaluate the printability of 3D printing materials,and the relationship between conventional working performance indicators and printing quality was established under experimental conditions.The results show that the extrusion uniformity of 3D printing mortar increases first and then decreases with the increase of fluidity,and decreases with the increase of dynamic yield stress.The cumulative deformation rate decreases with the increase of height retention rate and decreases with the increase of static yield stress.Under the conditions of this test parameters,when the extrusion uniformity is less than 3.5%,the cumulative deformation rate is not more than 6%,the dynamic yield stress is 200~800 Pa,and the static yield stress is 1800~3300 Pa,the number of printing layers of mortar is higher(not less than 30 layers),and the printability is better.
作者
李飞
卢亚
李威翰
徐小明
周华杰
张政
周理安
LI Fei;LU Ya;LI Weihan;XU Xiaoming;ZHOU Huajie;ZHANG Zheng;ZHOU Li’an(Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-Construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China MCC22 Group Corporation Ltd,Beijing 100062,China;Beijing Chongjian Engineering Co.,Ltd,Beijing 100061,China)
出处
《硅酸盐通报》
CAS
北大核心
2024年第5期1615-1622,共8页
Bulletin of the Chinese Ceramic Society
基金
中国二十二冶集团有限公司重点研发计划
国家重点研发计划(2022YFC3803400)。
关键词
3D打印
可挤出性
可建造性
挤出均匀性
累计形变率
评价方法
3D printing
extrudability
constructability
extrusion uniformity
accumulated deformation rate
evaluation method
