期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 262, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.120559
关键词
3D printing; Concrete digital construction; Extrusion-based deposition; Anisotropy; Printing pattern; Printing infill; Interface adhesion; Cold joints
资金
- Dana C. Wood Endowment at the University of New Mexico Foundation
Additive manufacturing relies on the deposition of layers of material upon existing ones. The nature of this method disadvantages materials such as concrete due to the rheological changes of the material over time, the lack of standardization of the printing process, and the nature of the deposition process. This paper examines the significance of infill printing patterns on the anisotropic properties of 3D printed concrete. The rheological properties, the compressive strength, and the interlayer and interfilamentous bond strength of the 3D printed concrete were characterized. We show that there is a directional dependency on all the infill patterns. The specimens show lower compressive strength, and modulus of elasticity in the Z (extrusion) direction compared with the X and Y directions but insignificant difference of the strength and modulus between the X and Y directions. However, no directional dependency was found for the strain at failure. On the other hand, no significant difference in the mechanical properties of 3D printed concrete was observed or can be attributed to the infill printing patterns. The results also show that the 3D printed concrete shows higher compressive strength, for two out of the three testing directions (X and Y) than conventionally cast concrete. This is due to the compactness associated with the printing process that is strongly dependent on the printing parameters. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据