
Dr. Jacques Kruger
Stellenbosch University
Designation:
Structure and Building Materials Laboratory Manager Researcher
Research Focus Area:
Jacques’ main research focus is on 3D printing of concrete (3DPC). He believes this technology has the potential to industrialise the construction industry. Early reports indicate 3DPC can reduce construction times and waste by 50% respectively. Furthermore, it also enables for increased architectural freedom. This construction process, however, requires significantly more research before mass adoption thereof in the South African construction sector.
PhD Title:
Rheo-mechanics modelling of 3D concrete printing constructability
Publications:
• van Zijl, Kruger, Cho & Zeranka. 2018. 3D printing polymer fibre concrete. In Proceedings of the International Inorganic-Bonded Fiber Composites Conference (IIBC), Cape Town, South Africa.
• Kruger, Cho, Zeranka & van Zijl. 2018. Multi-physics approach for improved thixotropy of cement-based materials for 3DPC. In Proceedings of the First International Conference on 3D Construction Printing (3DcP), Melbourne, Australia.
• Cho, Kruger, Zeranka & van Zijl. 2019. 3D printable concrete technology and mechanics. Concrete Beton Journal, 1:7-14. eISSN 2521-8263.
• Kruger, van den Heever, Cho, Zeranka & van Zijl. 2019. High-performance 3D printable concrete enhanced with nanomaterials. In Proceedings of the International Conference on Sustainable Materials, Systems and Structures, Rovinj, Croatia.
• Bester, van den Heever, Kruger, Zeranka & van Zijl, 2019. Benchmark structures for 3D concrete printing. In Proceedings of the fib Symposium on Innovations in Materials, Design and Structures, Krakow, Poland.
• S. Cho, J. Kruger, S. Zeranka, A.S. van Rooyen & G.P.A.G. van Zijl. 2019. Mechanical evaluation of 3D printable nano-silica incorporated fibre-reinforced lightweight foam concrete. Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FRAMCOS-X), Bayonne, France. DOI: 10.21012/FC10.232696
• Kruger, Zeranka & van Zijl. 2019. Quantifying constructability performance of 3D concrete printing via rheology-based analytical models. In Proceedings of the 2nd International RILEM Conference on Rheology and Processing of Construction Materials (RheoCon2), Dresden, Germany.
• S. Cho, J. Kruger, A.S. van Rooyen, S. Zeranka & G.P.A.G. van Zijl. 2019. Rheology of 3D printable lightweight foam concrete incorporating nano-silica. Proceedings of the 2nd International RILEM Conference: Rheology and Processing of Construction Materials (RheoCon2), Dresden, Germany. DOI: 10.1007/978-3-030-22566-7_43
• M. van den Heever, F.A. Bester, P.J. Kruger & G.P.A.G. van Zijl. 2019. Effect of Silicon Carbide (SiC) nanoparticles on 3D printability of cement-based materials. Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation (SEMC 2019), Cape Town, South Africa. DOI: 10.1201/9780429426506
• J. Kruger, S. Zeranka & G. van Zijl. 2019. An ab initio approach for thixotropy characterisation of (nanoparticle-infused) 3D printable concrete. Construction and Building Materials, 224:372-386. DOI: 10.1016/j.conbuildmat.2019.07.078
• J. Kruger, S. Zeranka & G. van Zijl. 2019. 3D concrete printing: A lower bound analytical model for buildability performance quantification. Automation in Construction, 106: 102904. DOI: 10.1016/j.autcon.2019.102904
• Kruger, Zeranka & van Zijl. 2019. A rheology-based quasi-static shape retention model for digitally fabricated concrete. Submitted to Construction and Building Materials Journal.
• Kruger, Cho, Zeranka, Viljoen & van Zijl. 2020. 3D concrete printer parameter optimisation for high rate digital construction avoiding plastic collapse. Composites Part B: Engineering, 183: 107660. DOI: 10.1016/j.compositesb.2019.107660
• G.P.A.G. van Zijl, J. Kruger, S. Cho, A.S. van Rooyen, F.A. Bester, M. van den Heever, P. Mogale. 2019. Towards sustainable employment in industrialised construction. Construction Printing Technology Worldwide Journal, 1:18-23.
Collaboration:
Research exchange with Technische Universiteit Eindhoven, The Netherlands, October – December 2018, collaboration effort on 3D printing of concrete. Currently typing journal paper.