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Title: Mechanical assessment of concrete - Steel bonding in 3D printed elements
Authors: Baz, Bilal Adnan
Aouad, Georges 
Leblond, Philippe
Mansouri, Omar Al-
D'hondt, Melody
Rémonda, Sébastien
Affiliations: Department of Civil and Environmental Engineering 
Keywords: Pull-out
Bond strength
3D printing
Additive manufacturing
Issue Date: 2020
Part of: Construction and building materials journal
Volume: 256
Start page: 1
End page: 11
Digital construction of concrete elements using 3D printing technology has been undergoing an exponential growth in terms of research activities and demonstration projects. Though, most researches focused on the behavior of the cementitious materials used in 3D printing, without deeply immersing in the reinforcement of printed elements. In this paper, a detailed experimental program is presented to characterize the quality of the bond developed between concrete and steel bars through a series of pull-out tests. These tests are performed over printed and non-printed samples as well. When printed, the layers orientation, whether parallel or perpendicular to the steel bar is taken into consideration. Hence, it was found that a highly thixotropic material did not undermine the developed bond between printed concrete and rebar. In addition, vibrated concrete (non-printed) gave better resistance to pull-out stresses succeeded by the parallel then the perpendicular samples. Yet, the overall performance of 3D printed concrete in terms of the bond generated with steel could be rated as satisfactory.
DOI: 10.1016/j.conbuildmat.2020.119457
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Civil and Environmental Engineering

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