Abstract
Recent years have seen a rapid growth of additive manufacturing methods for concrete construction. A recurring issue associated with these methods, however, is the lack of ductility in the resulting product. In cases this is solved by combining printing with conventional casting and reinforcing techniques. Alternatively, this paper presents first findings on the development of a system to directly entrain a suitable form of reinforcement during printing. A device is introduced to apply the reinforcement. Several options for online reinforcement medium are compared for printability and structural performance, based printing test runs and 4-point bending tests respectively. It is shown that high-performance steel cables can provide suitable reinforcement characteristics, although improved bond would allow better use of the cable capabilities. Significant post-cracking deformations and post-cracking strength can be achieved. Further research into optimal reinforcement placement and configuration is recommended.
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References
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Acknowledgements
The assistance in the 3DCP research of Master track students Structural Design at the TU/e Department of the Built Environment is highly valued. For this paper, the authors appreciate the work of E. Jutinov in particular, on who’s MSc graduation project the material presented is partially based.
The TU/e research program on 3DCP is co-funded by a partner group of enterprises and associations, that on the date of writing consisted of (alphabetical order) Ballast Nedam, BAM Infraconsult bv, Bekaert, Concrete Valley, CRH, Cybe, Saint-Gobain Weber Beamix, SGS Intron, SKKB, Van Wijnen, Verhoeven Timmerfabriek, and Witteveen+Bos. Their support is gratefully acknowledged. In particular, the authors would like thank SG Weber Beamix and Bekaert NV for supplying the printing concrete and reinforcement cables, respectively.
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Bos, F.P., Ahmed, Z.Y., Wolfs, R.J.M., Salet, T.A.M. (2018). 3D Printing Concrete with Reinforcement. In: Hordijk, D., Luković, M. (eds) High Tech Concrete: Where Technology and Engineering Meet. Springer, Cham. https://doi.org/10.1007/978-3-319-59471-2_283
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DOI: https://doi.org/10.1007/978-3-319-59471-2_283
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