- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
The recent interest in 3D printing with concrete has generated great interest on how inhomogeneities arise and affect performance parameters, in particular strength and durability. With respect to durability, of particular interest is how 3D printed layer interfaces can impact transport of species of interest, such as moisture, chlorides, or carbon dioxide in carbonation processes. This is of particular interest considering that the primary use case of 3D printed concrete has been as a lost formwork for a cast structural concrete, and thus it is of interest to determine the carbonation resistance. This study consists of a preliminary look at the microstructure after accelerated carbonation of a 3D printed concrete used as a lost formwork. Preferential carbonation is observed in the layer interfaces compared to the bulk of the printed filaments, possibly related to porosity from air voids or a locally high capillary porosity corresponding to the lubrication layer. Show more
Journal / seriesJournal of Microscopy
Pages / Article No.
Subjectcarbonation; concrete; digital fabrication; 3D printing; lubrication layer; microstructure
Organisational unit09593 - Angst, Ueli / Angst, Ueli
03891 - Flatt, Robert J. / Flatt, Robert J.
02284 - NFS Digitale Fabrikation / NCCR Digital Fabrication
194812 - Enhanced Durability Predictions of Reinforced Concrete Exposed to Corrosive Environments (follow-up proposal) (SNF)
141853 - Digital Fabrication - Advanced Building Processes in Architecture (SNF)
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