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硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (5): 1633-1641.

• “3D 打印无机非金属材料”专题(II) • 上一篇    下一篇

植筋与3D打印砂浆粘结性能试验研究

周荀1, 柳根金2, 王银辉2, 李贺东1, 耿健2, 谢伟鸿2, 倪坤3   

  1. 1.浙江理工大学建筑工程学院,杭州 310018;
    2.浙大宁波理工学院土木建筑工程学院,宁波 315100;
    3.北京建工新型建材有限责任公司,北京 100015
  • 收稿日期:2024-01-26 修订日期:2024-03-05 出版日期:2024-05-15 发布日期:2024-06-06
  • 通信作者: 柳根金,博士,讲师。E-mail:liugenjin@163.com
  • 作者简介:周荀(1997—),男,硕士研究生。主要从事3D打印水泥基材料的研究。E-mail:1209563584@qq.com
  • 基金资助:
    浙江省自然科学基金项目(LQ 22E080024);国家级大学生创新训练项目(202313022050)

Bond Performance Between Embedded Rebar and 3D Printed Mortar

ZHOU Xun1, LIU Genjin2, WANG Yinhui2, LI Hedong1, GENG Jian2, XIE Weihong2, NI Kun3   

  1. 1. School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    2. School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo 315100, China;
    3. Beijing Construction Engineering Group Advanced Construction Materials Co., Ltd., Beijing 100015, China
  • Received:2024-01-26 Revised:2024-03-05 Online:2024-05-15 Published:2024-06-06

摘要: 为探索植筋技术在3D打印水泥基材料中应用的可行性,本文通过拉拔试验,系统研究了钢筋植入方式(预埋、植入)、成型方式(浇筑、打印)、打印条与钢筋夹角(0°、90°)、粘结长度(5Ø、7Ø、10Ø,Ø代表钢筋直径)对植筋与3D打印砂浆粘结性能的影响规律,对不同试件的极限荷载、钢筋与砂浆基体的相对滑移、破坏形态进行了对比分析。结果显示,打印条与钢筋垂直时,采用植筋方式,粘结效果最佳, 垂直打印植筋试件极限荷载相较于预埋筋试件提升了58.30%。植筋方式下,极限荷载对应的滑移值增大;且随着粘结长度增加,极限荷载有所提升,但粘结长度超过7Ø后,极限荷载提升不明显,破坏模式由劈裂破坏转变为钢筋拉断。研究表明采用植筋加固可以显著提高3D打印砂浆与钢筋之间的粘结性能,提升试件的变形能力。

关键词: 3D打印砂浆, 植筋, 打印方式, 粘结性能, 拉拔试验, 破坏模式

Abstract: In order to explore the feasibility of rebar embedding technology in 3D printed cement-based materials, this study conducted a series of pull out tests to investigate the influence of rebar embedding methods (pre-embedded, embedded), forming methods (pouring, printing), the angle between the printing bar and the rebar (0°, 90°), and bond length (5Ø, 7Ø, 10Ø, Ø is rebar diameter) on the bond performance between embedded rebar and 3D printed mortar. Comparative analysis was carried out on the ultimate load, relative slip between rebar and mortar matrix, and failure modes of different specimens. The results show that when the printing bar is perpendicular to the rebar, the best bonding effect is achieved using the rebar embedding method. The ultimate load of vertically printed embedded rebar specimens is 58.30% higher than that of pre-embedded rebar specimens. Under the rebar embedding method, the corresponding slip value of the ultimate load increases. Additionally, with the increase of the bond length, the ultimate load increases, but the increase becomes less significant when the bond length exceeds 7Ø, and the failure mode changes from splitting failure to rebar pullout. The study indicates that reinforcement with rebar embedding can significantly improve the bond performance between 3D printed mortar and rebar and enhance the deformation capacity of the specimens.

Key words: 3D printed mortar, embedded rebar, printing method, bond performance, pull out test, destruction mode

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