This paper addresses the material buildability challenge in extrusion-based 3D Concrete Printing (3DCP) applications, since this is paramount to increase production rates of vertical elements such as columns. We utilized oscillatory rheology to determine the early-age structural build-up curves of 3DCP mixes comprising White Ordinary Portland Cement (OPC), Calcium Aluminate Cement (CAC), limestone filler, sand, viscosity modifying agent, retarder, and a plasticizer. Such curves served as basis to verify whether a geometry is printable, allowing for tuning the printing process parameters. The material characterization approach is validated through a case study, in which a column was designed – defining the structural build-up requirements – and printed using a robot-based 3DCP at a 0.68Â m/h vertical build rate. Such case study and lessons thereof provide valuable insights into the link between design, material properties and 3DCP process parameters, setting the basis for a comprehensive study on the early-age structural build-up measurements to support 3DCP mix design.
CITATION STYLE
Leal da Silva, W. R., Fryda, H., Bousseau, J. N., Andreani, P. A., & Andersen, T. J. (2020). evaluation of early-age concrete structural build-up for 3D concrete printing by oscillatory rheometry. In Advances in Intelligent Systems and Computing (Vol. 975, pp. 35–47). Springer Verlag. https://doi.org/10.1007/978-3-030-20216-3_4
Mendeley helps you to discover research relevant for your work.