Theo Salet's research while affiliated with Eindhoven University of Technology and other places

Publications (8)

Article
Full-text available
In this work, a framework for large-scale structural applications of 3D printed concrete is presented. The steps in this framework, consisting of a design phase, testing phase and manufactur-ing phase, towards a final output were presented and discussed theoretically. The framework was then applied to the case of a 29 m 3D printed bridge, construct...
Article
Full-text available
This contribution studies failure by elastic buckling and plastic collapse during 3D concrete printing of wall structures. Four types of experiments were performed, which demonstrate the circumstances under which elastic buckling and plastic collapse occur, the effect of geometrical imperfections on the buckling response, the influence by the curin...
Chapter
Full-text available
Over the past few years, several studies have shown the potential of three-dimensional concrete printing (3DCP) for applications in building and civil engineering. However, only a few studies have compared the properties of the fresh printing material and the quality of the printed elements from different printing facilities. Variations in the manu...
Chapter
The use of high strength steel cables directly entrained into printed concrete during the printing process, has previously been introduced as a method to provide reinforcement to objects being manufactured through a layer-extrusion based 3D concrete printing process. The bond between the cable and the cementitious mortar is a crucial parameter for...
Chapter
Additive manufacturing (AM) or 3D printing is a rapid prototyping process that has captured the attention of architects and designers worldwide in the last few years. Multiple research groups and commercial entities are exploring different areas of 3D concrete printing (3DCP) with one of the main topics being the potential to improve the design fre...
Book
This book gathers peer-reviewed contributions presented at the 2nd RILEM International Conference on Concrete and Digital Fabrication (Digital Concrete), held online and hosted by the Eindhoven University of Technology, the Netherlands from 6-9 July 2020. Focusing on additive and automated manufacturing technologies for the fabrication of cementiti...

Citations

... While multiple large scale projects have been realized, their structural integrity has been achieved in traditional ways, referring to solutions used in unreinforced masonry structures or creating compression structures [5,45]. None of the integrated reinforcement concepts developed have been used as primary reinforcement on a large scale as of yet. ...
... The literature summarised in Table 1 highlights two of the most common applications for 3DCP, the production of walls printed vertically (large length, small width, large height) and panels printed horizontally (large length, large width, small height). Both these applications drive the process to print in two modes: 1) homogeneous 'as good as cast' mode, often required for panel production [39][40][41][42]; and 'vertical shell' mode commonly used for the production of walls and columns, but also applied for printing formwork and for the production of many volumetric objects such as street furniture [6,9,43,46,47]. The shape of these may include straight or curved edges and vertices. ...
... A number of studies has also been done investigating the application of various fibres to improve material ductility [22][23][24][25][26][27][28]. Due to the process of 3DCP, most concepts suffer from high void content or not being validated on a large scale [38]. While multiple strategies are in development, a universal solution has not yet been found. ...
... The recent "Digital Concrete" conference [474] contains strong proofs of concrete design research and practice engagement in TO. While it is undeniable that the current progress is more strongly bounded to concrete Additive Manufacturing, under the name of 3D Concrete Printing (3DCP) [475], Topology Optimisation in concrete structures already advanced far beyond the unreinforced concrete, where AM is already flourishing, paving the way for interesting developments in reinforcement design models. ...
... Nevertheless, a strain hardening cementitious composite (SHCC) is a material that displays a relatively ductile behaviour, and has been successfully applied in 3D concrete printing [1]. The effect of different printing systems on the mechanical properties of 3DP-SHCC was investigated by Figueiredo et al. [2]. Here it was found that both the mechanical and the physical properties of 3DP-SHCC specimens manufactured at Delft University of Technology (TUD) and Eindhoven University of Technology (TU/e) were significantly different, which was mainly attributed to the differences in equipment (geometries, brands, types, specifications). ...
... According to the prediction provided by National Strategy for Additive Manufacturing (AM) in the UK, 3D concrete printing is expected to contribute >1 billion to annual GDP by 2025 [1]. However, the development of 3D printed concrete for industrial applications is still arrested due to several drawbacks such as the lack of fusion [2], bad surface quality [3], strict rheological requirements [4], and the mode of collapse [5]. Among these, solving the conflict between pumping and deposition, i.e. achieving the stiffening control, might be the most pressing issue in the context of extrusion-based 3D concrete printing. ...