ASTM Worldwide’s additive manufacturing committee (F42) is growing a proposed commonplace (WK94968) that goals to assist outline the printability vary of cementitious supplies for ‘any given extrusion-based 3D printer.’
WK94968 is beneath growth inside the committee’s check strategies subcommittee (F42.01).
Based on ASTM member Reza Foruzanmehr, the brand new commonplace addresses an current hole by offering a check technique that may determine the compatibility zone between cementitious mixtures and 3D printing extrusion techniques by way of optimum rheological properties.
“Think about the instance of a piping bag used for adorning muffins. If the cream inside is just too stiff, it won’t come out. Whether it is too runny, it won’t maintain its form,” mentioned Foruzanmehr, Affiliate Professor within the Division of Civil Engineering on the College of Ottawa. “The scale and form of the nozzle, in addition to the drive utilized to squeeze the bag, additionally have an effect on the end result.”
The usual defines the minimal and most values of yield stress and viscosity, inside which cementitious supplies will be reliably extruded whereas sustaining printability components, with out requiring entry to costly and time-consuming rheometric assessments.
Foruzanmehr notes that by offering a reproducible and accessible strategy to evaluating materials printability, the usual helps optimised combine design, correct printer calibration, and constant high quality management for extrusion-based 3D printing techniques.
This effort immediately pertains to the United Nations Sustainable Improvement Purpose #11 on Sustainable Cities and Communities, #9 on Trade, Innovation, and Infrastructure, and #12 on Accountable Consumption and Manufacturing.
Earlier this week, ASTM Worldwide’s Wohlers Associates workforce sat down with TCT to discover the important thing findings of this yr’s Wohlers Report, the way it has transitioned into ASTM Worldwide after the 2021 acquisition, and what goes into the event of the report.
