Abstract
Large scale construction 3D Concrete Printing (3DcP) has gained much attention worldwide with the recent developments of many new technologies and proof of concept structures. One inherent limitation in 3DcP is the automatic laying of reinforcement. So far, the methods proposed for integrating vertical reinforcement are rudimentary and involve manual post processes. Majority of 3DcP wall structures overcome this issue by using the printed section as a shell and after hardening involve manual post processes to reinforce the structure. In this paper a new method of reinforcing is introduced termed the Layer Penetration Reinforcing Method (LPRM). This process involves the printing of a predetermined number of layers, then the subsequent penetration of pre-cut reinforcement through the fresh layers. To prove the concept a lab scale wall (300 mm tall) is printed and reinforced with 7 mm deformed steel bar and ×9 mm stainless steel helical bar. The wall is cut into 100 mm × 60 mm × 300 mm beam sections and tested in 3-point bending with the bar sitting a depth of approximately 70 mm to measure the flexural strength. The samples are compared to conventionally reinforced concrete. Results have shown that the printed beams with deformed bar and helical bar increase the flexural strength of the wall by 184% and 142% respectively. Deformed bar proved superior over helical bar in reinforcing a 3DcP section by obtaining a flexural strength 83% that of a conventional reinforced section, compared to 47% for helical bar.
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References
Sanjayan, J.G., Nazari, A., Nematollahi, B.: 3D Concrete Printing Technology: Construction and Building Applications, 1 edn. Butterworth-Heinemann (2019)
Buswell, R.A., et al.: 3D printing using concrete extrusion: a roadmap for research. Cem. Concr. Res. 112, 37–49 (2018)
Marchment, T., Sanjayan, J.: Mesh reinforcing method for 3D concrete printing. Autom. Constr. 109, 102992 (2020)
Arunothayan, R., et al.: Development of a 3D-Printable Ultra-High Performance Fiber-Reinforced Concrete for Digital Construction. Preprints (2019)
Bong, S.H., et al.: Properties of 3D-Printable Ductile Fibre-Reinforced Geopolymer Composite for Digital Construction Applications. Springer, Cham (2020)
Vantyghem, G., et al.: 3D printing of a post-tensioned concrete girder designed by topology optimization. Autom. Constr. 112, 103084 (2020)
Kreiger, E., Kreiger, M., Case, M.: Development of the construction processes for reinforced additively constructed concrete. Add. Manuf. 28, 39–49 (2019)
Ma, G., et al.: Micro-cable reinforced geopolymer composite for extrusion-based 3D printing. Mater. Lett. 235, 144–147 (2019)
Bos, F.P., et al.: 3D Printing Concrete with Reinforcement. Springer, Cham (2018)
Mechtcherine, V., et al.: 3D-printed steel reinforcement for digital concrete construction – Manufacture, mechanical properties and bond behaviour. Constr. Build. Mater. 179, 125–137 (2018)
Abou Yassin, A., Hamzeh, F., Al Sakka, F.: Agent based modeling to optimize workflow of robotic steel and concrete 3D printers. Autom. Const. 110, 103040 (2020)
Baz, B., Aouad, G., Remond, S.: Effect of the printing method and mortar’s workability on pull-out strength of 3D printed elements. Constr. Build. Mater. 230, 117002 (2020)
Marchment, T., Sanjayan, J.: Bond Properties of Reinforcing Bar Penetrations in 3D Concrete Printing. Pending Publication (2020)
BS EN 196-1:1995, Methods of testing cement - Part 1: Determination of strength (1995)
Tay, Y.W.D., et al.: Time gap effect on bond strength of 3D-printed concrete. Virtual Phys. Prototyping 14(1), 104–113 (2019)
Wolfs, R.J.M., Bos, F.P., Salet, T.A.M.: Hardened properties of 3D printed concrete: the influence of process parameters on interlayer adhesion. Cem. Concr. Res. 119, 132–140 (2019)
Nerella, V.N., Hempel, S., Mechtcherine, V.: Effects of layer-interface properties on mechanical performance of concrete elements produced by extrusion-based 3D-printing. Constr. Build. Mater. 205, 586–601 (2019)
Marchment, T., et al.: Chapter 12 - interlayer strength of 3D printed concrete: influencing factors and method of enhancing. In: Sanjayan, J.G., Nazari, A., Nematollahi, B. (eds.) 3D Concrete Printing Technology. Butterworth-Heinemann, pp. 241–264 (2019)
Sanjayan, J.G., et al.: Effect of surface moisture on inter-layer strength of 3D printed concrete. Constr. Build. Mater. 172, 468–475 (2018)
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Marchment, T., Sanjayan, J. (2020). Penetration Reinforcing Method for 3D Concrete Printing. In: Bos, F., Lucas, S., Wolfs, R., Salet, T. (eds) Second RILEM International Conference on Concrete and Digital Fabrication. DC 2020. RILEM Bookseries, vol 28. Springer, Cham. https://doi.org/10.1007/978-3-030-49916-7_68
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DOI: https://doi.org/10.1007/978-3-030-49916-7_68
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