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SHCC Reinforced 3D Printed Concrete (2023-01)

10.1007/978-3-031-15805-6_9

 van Zijl Gideon,  van den Heever Marchant,  Cho Seung
Contribution - Strain-Hardening Cementitious Composites, pp. 79-88

Abstract

The paper presents a reinforcement strategy for 3D printed concrete by a thin, bonded strain-hardening cement-based composite (SHCC) overlay. Concrete structures additively manufactured through extrusion-based 3D concrete printing (3DCP) present orthotropic mechanical behaviour. Tensile strength and ductility across layers are a fraction of those in the extruded direction, i.e. parallel to the layers, due to reduced interfacial bond between printed layers. In addition, structural application of 3DCP may require reinforcement to enhance limited tensile capacity of printed concrete. Strategies for automated 3DCP reinforcement are sought that retain the benefits of 3DCP technology. Here, a thin, bonded SHCC reinforcing overlay is proposed. Automation is envisaged by integration of either spraying technology, or multiple nozzle technology for new, composite structural elements. For retrofitting of existing 3DCP, shotcrete or plaster application is appropriate. For the proof of concept here, thin SHCC overlays were simply plastered onto 3DCP elements. Characterising tensile tests are performed on SHCC dumbbells, and SHCC-3DCP interfacial tensile (pull-off) and shearing adhesive (triplet) tests. From these results composite 3DCP-SHCC specimens were designed to exhibit ductile behaviour by multiple cracking of the SHCC overlay, as opposed to abrupt, brittle delamination of the SHCC overlay from 3DCP substrate. Subsequently, reference 3DCP beams and SHCC reinforced 3DCP beams were prepared and subjected to in-plane and out-of-plane actions. The results validate thin bonded SHCC overlay as an appropriate reinforcement strategy for significantly increased resistance and ductility.

4 References

  1. Bester Frederick, Heever Marchant, Kruger Jacques, Zijl Gideon (2020-11)
    Reinforcing Digitally Fabricated Concrete:
    A Systems Approach Review
  2. Bos Freek, Ahmed Zeeshan, Jutinov Evgeniy, Salet Theo (2017-11)
    Experimental Exploration of Metal-Cable as Reinforcement in 3D Printed Concrete
  3. Heever Marchant, Bester Frederick, Kruger Jacques, Zijl Gideon (2021-07)
    Mechanical Characterisation for Numerical Simulation of Extrusion-Based 3D Concrete Printing
  4. Marchment Taylor, Sanjayan Jay (2020-09)
    Bond Properties of Reinforcing Bar Penetrations in 3D Concrete Printing

1 Citations

  1. Nefs Karsten, Sloots Joes, Kroon Kim, Bos Freek et al. (2024-05)
    Analytical Modeling of the Orientation-Dependency of 3D Printed SHCC at Increasing Levels of Scale

BibTeX 
@inproceedings{zijl_heev_cho.2023.SR3PC,
  author            = "Gideon Pieter Adriaan Greeff van Zijl and Marchant van den Heever and Seung Cho",
  title             = "SHCC Reinforced 3D Printed Concrete",
  doi               = "10.1007/978-3-031-15805-6_9",
  year              = "2023",
  volume            = "39",
  pages             = "79--88",
  booktitle         = "Strain-Hardening Cementitious Composites",
  editor            = "Minoru Kunieda and Toshiyuki Kanakubo and Tetsushi Kanda and Koichi Kobayashi",
}
Formatted Citation

G. P. A. G. van Zijl, M. van den Heever and S. Cho, “SHCC Reinforced 3D Printed Concrete”, in Strain-Hardening Cementitious Composites, 2023, vol. 39, pp. 79–88. doi: 10.1007/978-3-031-15805-6_9.

Zijl, Gideon Pieter Adriaan Greeff van, Marchant van den Heever, and Seung Cho. “SHCC Reinforced 3D Printed Concrete”. In Strain-Hardening Cementitious Composites, edited by Minoru Kunieda, Toshiyuki Kanakubo, Tetsushi Kanda, and Koichi Kobayashi, 39:79–88, 2023. https://doi.org/10.1007/978-3-031-15805-6_9.