123 research outputs found
Quality Assessment of Printable Strain Hardening Cementitious Composites Manufactured in Two Different Printing Facilities
No full textOver 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 manufacturing conditions caused by the mixing procedures, the pumping device and the nozzle shape and/or dimensions may influence the quality of the printed elements. This study investigates the differences in the fresh and hardened properties of a printing material tested in two different printing facilities. The pump pressure and temperature experienced by the printing material during the printing session are monitored real-time. Hardened properties are measured for the printed elements, such as the bending capacity, the apparent density, and the air void content. The research shows that two different printing facilities may result in printed elements with relative differences in flexural strength and volumetric density of 49% and 7%, respectively.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Materials and Environmen
Inspection methods for 3D concrete printing
No full text3D Concrete Printing (3DCP) is being used for off-site manufacture of many elements found in the built environment, ranging from furniture to bridges. The advantage of these methods is the value added through greater geometrical freedom because a mould is not needed to create the form. In recent years, research has focused on material properties both in the wet and hardened state, while less attention has been paid to verifying printed forms through geometry measurement. Checking conformity is a critical aspect of manufacturing quality control, particularly when assembling many components, or when integrating/interfacing parts into/with existing construction. This paper takes a case study approach to explore applications of digital measurement systems prior to, during, after manufacture using 3DCP and after the assembly of a set of 3DCP parts and discusses the future prospects for such technology as part of geometry quality control for the procurement of 3DCP elements for the built environment
Structural behaviour of 3D printed concrete
No full textPromotieonderzoek geeft meer inzichten in constructieve eigenschappen, zoals sterkte, stabiliteit en hechting, zowel tijdens het printproces als gedurende de levensduur van een geprint object
Structural behaviour of 3D printed concrete
No full textPromotieonderzoek geeft meer inzichten in constructieve eigenschappen, zoals sterkte, stabiliteit en hechting, zowel tijdens het printproces als gedurende de levensduur van een geprint object
The status quo of 3D concrete printing:are we there yet?
Full text linkThe technology of 3D concrete printing has seen a rapid growth in industrial applications and academic activities over the past decade. 3D Printing is beingadvertised to address the urgent sustainability and productivity challenges in the field of construction, by reducing the total amount of concrete in buildingsor structures, and by producing them in an automated, high-speed and robust manner. Today, however, 3D concrete printing does not yet live up to itsfull potential. In this contribution, the advancements in recent years are discussed, and the status quo of the technology is assessed from a productivityand sustainability perspective. Finally, recommendations for the next steps in the development towards a higher efficiency and reduced environmentalimpact are provided
Structural behaviour of 3D printed concrete
No full textPromotieonderzoek geeft meer inzichten in constructieve eigenschappen, zoals sterkte, stabiliteit en hechting, zowel tijdens het printproces als gedurende de levensduur van een geprint object
The status quo of 3D concrete printing:are we there yet?
Full text linkThe technology of 3D concrete printing has seen a rapid growth in industrial applications and academic activities over the past decade. 3D Printing is beingadvertised to address the urgent sustainability and productivity challenges in the field of construction, by reducing the total amount of concrete in buildingsor structures, and by producing them in an automated, high-speed and robust manner. Today, however, 3D concrete printing does not yet live up to itsfull potential. In this contribution, the advancements in recent years are discussed, and the status quo of the technology is assessed from a productivityand sustainability perspective. Finally, recommendations for the next steps in the development towards a higher efficiency and reduced environmentalimpact are provided
The status quo of 3D concrete printing:are we there yet?
No full textThe technology of 3D concrete printing has seen a rapid growth in industrial applications and academic activities over the past decade. 3D Printing is beingadvertised to address the urgent sustainability and productivity challenges in the field of construction, by reducing the total amount of concrete in buildingsor structures, and by producing them in an automated, high-speed and robust manner. Today, however, 3D concrete printing does not yet live up to itsfull potential. In this contribution, the advancements in recent years are discussed, and the status quo of the technology is assessed from a productivityand sustainability perspective. Finally, recommendations for the next steps in the development towards a higher efficiency and reduced environmentalimpact are provided
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