Discontinuous Long Fibre Reinforced Thermoplastic for Additive Manufacturing

Current large-scale additive manufacturing extruders use short reinforcing fibre-filled thermoplastic pellets, which marginally improve the mechanical performance but are too short to exploit the strength of the fibres fully. Long fibre pellets have much higher potential strength, and the development of higher strength materials could create...

From the ground up: Robotic Additive Manufacturing (RAM) of a structurally optimized earthen shell through computational design

When designing for structural performance, the geometry of the load-bearing elements is crucial for achieving the required stability. This is even more important in structural forms, such as shells and arches that are predominantly designed by their structural requirements. However, the typical design process starts with the design by the...

Section Active Extruded Glass Structural Elements: an explorative study on their potential for architecture

Glass buildings seem to be as popular as ever (Louter, 2011) and glass shapes the appearance of contemporary architecture unlike any other building material (Wurm, 2007). Moreover, the demand for glass buildings is rising (Eskilson, 2018). As designers look to make the buildings as transparent as possible, the ambition is to execute structural...

The Effect of Viscosity-Modifying Admixture on the Extrudability of Limestone and Calcined Clay-Based Cementitious Material for Extrusion-Based 3D Concrete Printing

To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two...

Limestone and Calcined Clay-Based Sustainable Cementitious Materials for 3D Concrete Printing: A Fundamental Study of Extrudability and Early-Age Strength Development

The goal of this study is to investigate the effects of different grades of calcined clay on the extrudability and early-age strength development under ambient conditions. Four mix designs were proposed. Three of them contained high, medium, and low grades of calcined clay, respectively, and one was the reference without calcined clay. In terms...

3D-Paintbrush: Melting and cooling plastics

This thesis describes the process of redesigning the 3D-paintbrush. It looks into extruder screws for plastics and finds the best design variables for the 3D-paintbrush. Vortex cooling has been used to cool the extruded plastics fast and efficient. With the findings for melting and cooling the thesis looks at human-machine interaction and...

3D paint brush: a journey of plastic

This project is about controlling plastic such that a designer can create 3D art structures of 3 x 3 x 3 meters. The designer and main stakeholder (Tiwánee van der Horst) of this project has just started her own art business. Her inspiration to make art comes from her own graduation project. In this project she wants to convert 2D painting into...

Lightweight gypsum mortar with construction waste to be used as coatings with improved superficial hardness

This work studies the physical and mechanical behavior of a light gypsum eco-mortar, made with aggregates from ceramic waste and extruded polystyrene (XPS) waste. The main objective to include waste into the gypsum compound is to reduce the amount of raw material used (gypsum) and thus reduce the environmental impact, improving the...

Design and experimental testing of the bundled glass column

Engineering the bundled glass column: From the design concept to full-scale experimental testing

This article gives an overview of the research conducted by the authors from the design concept to the engineering and full-scale testing of the bundled glass column. Consisting of adhesively bonded solid glass rods, the bundled column is a promising solution for transparent compressive members. To investigate the feasibility of the bundled...

Design and experimental testing of the bundled glass column

Glass columns are a promising solution for transparent structural members, capable of transferring the compressive loads in a building while allowing for light and space continuity. Several different types of all-glass columns have been explored in the past, nevertheless, they are seldom applied in construction. Reasons include complications in...

De Industriële Tunnelbouw Methode in het Ondergronds Logistiek Systeem / The Industrial Tunnelling Method in the Underground Logistic System: Een analyse van de tunnel-grond interactie in axiale richting / Analysis of axial soil – structure interaction

Het OLS-project (Ondergronds Logistiek Systeem) beoogd een betrouwbare verbinding te creëren voor het transport van bloemen tussen de veiling in Aalsmeer, Schiphol en een toekomstige railterminal bij Hoofddorp. Een variant voor de uitvoering van de drie boortunnels in het tracé is de Industriële Tunnelbouw Methode (ITM). Dit is een innovatieve...

Effects of cooling rate on corrosion properties of high strength aluminium alloys under atmospheric conditions

Long-term outdoor exposure tests were done to investigate the effect of cooling rate on corrosion and stress corrosion properties of extruded rods of the high strength aluminium alloys 2024-T4, 2023-T6, 7075-T6 and 7075-T73. The 2024 alloy exhibited a high susceptibility to SCC irrespective of best treatment and cooling rate, whereas 7075-T6 was...