About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Process Development
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Presentation Title |
Concrete Metering and Extrusion System for Infastructure-scale Printing |
Author(s) |
Celeste E. Atkins, Brian K. Post, Phillip Chesser, Alex Roschli, Alex Boulger, Jesse Heineman, Peter Lloyd, Randall Lind, Lonnie Love |
On-Site Speaker (Planned) |
Celeste E. Atkins |
Abstract Scope |
Over the years a number of researchers and companies have begun 3D printing concrete. However, in most systems the only control to the flow of concrete is a single pump to the side of the machine that pumps the concrete to the end effector. This causes large amounts of latency in the flow of the concrete due to the distance of the pump from the end effector. This makes the material deposition difficult to control and creates defects in the print. The research on concrete 3D printing at Oak Ridge National Laboratory in the Manufacturing Demonstration Facility leveraged an approach used in other types of 3D printing systems by placing an extruder on the end effector to meter the flow accurately which functions in tandem with a remote pump. Several extruder designs were evaluated and tested. This paper will detail the process of extruder development and printing impacts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |