A quality control framework for digital fabrication with concrete

Derk  Bos; Rob Wolfs

doi:10.21809/rilemtechlett.2023.181

Authors

Derk Bos Eindhoven University of Technology https://orcid.org/0000-0002-1668-2638
Rob Wolfs Eindhoven University of Technology https://orcid.org/0000-0001-7897-433X

DOI:

https://doi.org/10.21809/rilemtechlett.2023.181

Keywords:

concrete processing, non-destructive, off-line, on-line, in-line, in-situ

Abstract

The quality control of digital fabrication with concrete has more stringent requirements than traditional casting. Firstly, since formwork is typically absent, or removed at an early stage in production, the material is exposed to external influences that can result in deformations, collapse, or deterioration. Therefore, the evolution of properties during the process has to be controlled. Secondly, the fabrication systems are typically more sensitive to dosing fluctuations, and the produced, optimized objects are more sensitive to defects, which requires the process variations to be controlled at a higher resolution. A framework is presented that categorizes quality control experiments into destructive and non-destructive, according to their systematic error, and according to the location of testing with respect to the process. This framework is applied to the fresh state mechanical performance of concrete and quality control strategies are derived from it. Lastly, research gaps are identified that are critical for the further development and adoption of these quality control strategies in digitally fabricated concrete.

Author Biographies

Derk Bos, Eindhoven University of Technology

Derk Bos obtained his MSc degree cum laude at the unit of Structural Engineering and Design at the Department of the Built Environment of the TU/e in 2019. He graduated at the chair of Applied Mechanics on: "Effect of imperfections on axially loaded members and experimental verification on 3D printed polypropylene". Since then, he is conducting a promotion trajectory at the chair of Concrete Structures.

Rob Wolfs, Eindhoven University of Technology

Rob Wolfs is an Assistant Professor in the Unit of Structural Engineering and Design in the Department of the Built Environment of Eindhoven University of Technology (TU/e). The research and teaching of Rob focuses on digital design and manufacturing strategies, with the aim to enhance the sustainability and productivity of the architecture, engineering and construction industry. Key topics concern the application of robotics in construction, with a focus on 3D concrete printing, and digital design technologies such as numerical modelling, machine learning and (structural) optimization.