Inter-laboratory study on the influence of 3D concrete printing set-ups on the bond behaviour of various reinforcements
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Date
2022-10
Publication Type
Journal Article
ETH Bibliography
yes
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Abstract
This study investigates the influence of different printing set-ups and materials on the bond strength of reinforcement manually placed between 3D printed concrete layers. An identical experimental campaign was performed at two institutes in Switzerland and Italy. Each institute used its own printing process, which consisted either of a set on-demand mix or a high yield stress material. Two types of reinforcement (reinforcing bar Ø8 mm and a high strength steel wire Ø1 mm) and three production configurations (casting and printing with the reinforcement parallel or perpendicular to the printing direction) were investigated. The results showed high bond strength with only a limited influence of the fabrication method for the reinforcing bars. An increased bond was observed for the set on-demand approach compared to the high yield strength material. The comparison with existing models showed that the reinforcing bar bond strength of printed concrete varies slightly from conventional concrete. The high strength wires exhibited poor bond. Based on the gathered experiences, insights into the standardisation of testing for 3D concrete printing are discussed.
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published
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Journal / series
Volume
133
Pages / Article No.
104660
Publisher
Elsevier
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Edition / version
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Date collected
Date created
Subject
Inter-laboratory study; Digital fabrication with concrete; 3D extrusion concrete printing; Interlayer reinforcement strategies; Bond behaviour
Organisational unit
09469 - Kaufmann, Walter / Kaufmann, Walter
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
Notes
Funding
141853 - Digital Fabrication - Advanced Building Processes in Architecture (SNF)
Related publications and datasets
Is supplemented by: https://doi.org/10.3929/ethz-b-000556740