Abstract
3D concrete printing is a promising additive manufacturing technique, integrated in construction industry to improve the geometrical complexity without expensive formworks. Due to the layered extrusion of the material, the porosity increases. This makes the component more prone to shrinkage and crack formation and increases the preferential ingress paths for aggressive substances. This can affect the durability and microstructure of the printed elements in a negative way. To assess the durability of 3D printed materials, three deterioration mechanisms (i.e. chloride ingress, carbonation and freeze/thaw) are investigated, considering different time gaps (i.e. 0 and 30 min) in between the layers and a comparison with traditional cast specimens was made. It was found that the resistance of 3D printed specimens against the penetration of chemical substances decreases with an increasing time gap. Compared with cast specimens, a higher saturated mass after frost attack could be observed in case of printed specimens.
Original language | English |
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Article number | 106777 |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Cement and Concrete Research |
Volume | 155 |
DOIs | |
Publication status | Published - May 2022 |
Bibliographical note
Funding Information:J. Van Der Putten would like to acknowledge the support by EFRO for the C3PO-project (B/15100/01). P. Van den Heede is a postdoctoral fellow of the Research Foundation-Flanders ( FWO ) and gratefully acknowledge for the financial support of projects No. 3E013917 and No. G062720N.
Publisher Copyright:
© 2022 Elsevier Ltd
Funding
J. Van Der Putten would like to acknowledge the support by EFRO for the C3PO-project (B/15100/01). P. Van den Heede is a postdoctoral fellow of the Research Foundation-Flanders ( FWO ) and gratefully acknowledge for the financial support of projects No. 3E013917 and No. G062720N.
Keywords
- 3D printing
- Carbonation
- Chloride ingress
- Durability
- Freeze-thaw resistance