Fresh and anisotropic-mechanical properties of 3D printable ultra-high ductile concrete with crumb rubber

被引：169
作者：
Ye, Junhong [1 ]
Cui, Can [1 ]
Yu, Jiangtao [1 ,2 ]
Yu, Kequan [1 ]
Xiao, Jianzhuang [2 ,3 ]
机构：
[1] Tongji Univ, Dept Disaster Mitigat Struct, Coll Civil Engn, Siping Rd 1239, Shanghai 200092, Peoples R China
[2] Tongji Univ, Minist Educ, Key Lab Performance Evolut & Control Engn Struct, Shanghai, Peoples R China
[3] Tongji Univ, Coll Civil Engn, Dept Struct Engn, Siping Rd 1239, Shanghai 200092, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2021年 / 211卷
基金：
中国国家自然科学基金;
关键词：
3D concrete printing; Ultra-high ductile concrete; Crumb rubber; Fresh properties; Mechanical anisotropy;
D O I：
10.1016/j.compositesb.2021.108639
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study developed a novel ultra-high ductile concrete (UHDC) for 3D concrete printing, which was modified using crumb rubber to possess high ductility. Flowability tests were conducted to determine optimal open time range for continuous printing. A series of mechanical tests, including uniaxial tensile test, compressive test, flexural test and double shear test, were carried out to investigate the anisotropic-mechanical properties of the printed UHDC. The results indicate that the tensile strength, flexural strength and shear strength of the printed specimens were slightly lower than those of mold-cast specimens, while reverse tendency was observed in compressive strength. It is of interest that the deformability and energy dissipation of the printed UHDC at some directions are higher than those of mold-cast UHDC. Additionally, it is found that the printed UHDC performed minimal anisotropy in flexural strength, but significant anisotropy in flexural deformability, compressive and flexural energy dissipation capacity.
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页数：12
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