Freeze-Thaw Performance of 3D Printed Concrete: Influence of Interfaces
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Author / Producer
Date
2022
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
The long-term performance of 3D printed concrete structures is essential and among the various durability issues, frost damage is one of key importance, especially in cold locations such as Switzerland. For 3D printed materials, the presence of layer interfaces and cold joints is a potential issue in terms of frost resistance. Therefore, after extrusion, both cast and printed samples were prepared, and they were subjected to 300 cycles of freeze-thaw in accordance with ASTM C666. It was found that printed samples have lower resistance to freeze-thaw conditions compared to their cast counterparts. The lower resistance of the printed samples could be attributed to the heterogeneity in the microstructure, in particular to the higher capillary porosity in the interface region compared to that in the bulk. The higher capillary porosity could be confirmed based on the sorptivity test results.
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Publication status
published
External links
Book title
Third RILEM International Conference on Concrete and Digital Fabrication
Journal / series
Volume
37
Pages / Article No.
200 - 205
Publisher
Springer
Event
3rd RILEM International Conference on Concrete and Digital Fabrication (Digital Concrete 2022)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
3D printing; Frost damage; Interface; Capillary porosity
Organisational unit
03891 - Flatt, Robert J. / Flatt, Robert J.
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
Notes
Funding
-- - NCCR Digital Fabrication (SNF)
141853 - Digital Fabrication - Advanced Building Processes in Architecture (SNF)
141853 - Digital Fabrication - Advanced Building Processes in Architecture (SNF)