Experimental Study on Interfacial Shear Behavior of 3D Printed Recycled Mortar

被引：4
|
作者：
Wang, Ziyue [1 ]
Chen, Zixuan [1 ]
Xiao, Jianzhuang [1 ,2 ]
Ding, Tao [1 ,3 ]
机构：
[1] Tongji Univ, Coll Civil Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China
[2] Tongji Univ, Key Lab Performance Evolut & Control Engn Struct, Minist Educ, Shanghai, Peoples R China
[3] State Key Lab Solid Waste Reuse Bldg Mat, Beijing, Peoples R China
来源：
3D PRINTING AND ADDITIVE MANUFACTURING | 2024年 / 11卷 / 03期
基金：
中国国家自然科学基金;
关键词：
3D printed concrete; recycled mortar; interfacial shear test; interfacial bond properties; surface treatments; HARDENED PROPERTIES; MECHANICAL-PROPERTIES; INTERLAYER ADHESION; BOND STRENGTH; CONCRETE; PERFORMANCE;
D O I：
10.1089/3dp.2022.0338
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel shear test method on shear bond behavior of 3D printed interlayer interfaces and interstrip interfaces was proposed in this study. Thereafter, the effect of different replacement ratios of recycled sand, printing intervals, and surface treatments were investigated. The test results showed that under the same printing condition, the interfacial shear strengths of interlayer interface and interstrip interface were similar to each other. The interfacial shear strength slightly decreased with the increase of the replacement ratio of recycled sand, while it sharply decreased with the extension of printing interval time. The interfaces in 3D printed recycled mortar had higher time sensitivity compared with 3D printed natural mortar. Considering that discontinuous construction will introduce inferior interfaces in 3D printed concrete components, effective surface treatments should be conducted. According to the test results, the improvement effect of surface treatments was epoxy paste > cement paste > surface wetting > no treatment.
引用
收藏
页码：e1162 / e1174
页数：13
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