High-performance 3d printable concrete enhanced with nanomaterials

Author(s): Jacques Kruger, Marchant van den Heever, Seung Cho, Stephan Zeranka and Gideon van Zijl
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 557-564
Total Pages: 8
Language : English

Abstract: The development of high-performance concrete (HPC) suitable for 3D printing is restricted by the fresh state of concrete i.e. a narrow workability concrete range that will yield appropriate printability and buildability. Thus, the main focus is to first obtain sufficient concrete rheology, followed by enhanced mechanical characteristics in the hardened state. A HPC material that appertains to 3D printing should therefore yield superior properties in both the fresh and hardened concrete state. In this research, silicon carbide (SiC) and silica (SiO2) nanoparticles are added and compared to a reference HPC material suitable for 3D printing. Fresh state properties that result in improved buildability are depicted by means of novel static yield shear stress evolution curves. The effect of nanoparticle addition on the performance in the hardened state, in terms of mechanical strength and stiffness, is also characterised. Furthermore, the effect on the interlayer bond strength between successive filament layers is determined, which typically is the weakest section in 3D printed elements.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00