3D打印再生聚氯乙烯砂浆可打印性及力学各向异性研究  

Study on printability and mechanical anisotropy of 3D printed recycled PVC mortar

作　　者：吴金蔚 潘志宏[1] 周娟兰 郑鸿润 张旋 WU Jinwei;PAN Zhihong;ZHOU Juanlan;ZHENG Hongrun;ZHANG Xuan(School of Architecture and Civil Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学土木工程与建筑学院,镇江212100

出　　处：《江苏科技大学学报(自然科学版)》2025年第1期57-64,共8页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：英国文化教育协会2022年度中英学术合作交流项目;江苏省研究生科研与实践创新计划项目(KYCX23_3896)。

摘　　要：为了研究再生聚氯乙烯(polyvinyl chloride,PVC)掺量对3D打印砂浆可打印性及力学性能的影响,配制了4种不同PVC掺量的3D打印砂浆,探究了不同PVC掺量对挤出性和建造性的影响,从而判断其可打印性.通过研究不同PVC掺量对3D打印砂浆密度、吸水率以及在X、Y和Z方向上的抗压性能和抗折性能的影响,探讨力学各向异性.结果表明:随PVC掺量增大,打印PVC砂浆可挤出性提高,建造性变差;表观密度减小,吸水率增大;抗压强度和抗折强度均下降;砂浆抗折强度力学各向异性加剧.X轴方向抗压强度最高,Y轴方向抗折强度最高.砂浆抗压强度各向异性在后期更明显,抗折强度在前期更显著,且掺加PVC颗粒对抗折强度力学各向异性整体影响更大.In order to study the effect of recycled polyvinyl chloride(PVC)content on the printability and mechanical properties of 3D printed mortar,four kinds of 3D printed mortar with different PVC content were prepared.The influence of different PVC content on extrudability and constructability was investigated,so as to judge its printability.The mechanical anisotropy of 3D printed mortar was investigated by studying the effect of different PVC content on density,water absorption,compressive and flexural properties in X、Y and Z directions.The results show that the extrudability of printed PVC mortar increases and the constructability deteriorates with the increase of PVC content.The apparent density decreases and the water absorption increases,and both compressive strength and flexural strength decrease.The mechanical anisotropy of mortar flexural strength has intensified.The compressive strength in the X direction is the highest,and the flexural strength in the Y direction is the highest.The anisotropy of the compressive strength of mortar is more obvious in the late stage,the flexural strength is more significant in the early stage,and the addition of PVC particles has a greater effect on the anisotropy of flexural strength mechanics.

关 键 词：3D打印 聚氯乙烯砂浆 可打印性 力学性能 各向异性 

分 类 号：TU528.041[建筑科学—建筑技术科学]