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Related Concept Videos

Porosity in Cement Paste01:18

Porosity in Cement Paste

117
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
117

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Cork Powder Residues Processing by Binder Jetting.

Sara P Magalhães da Silva1,2,3, Iara Castro1,2,3, José M Oliveira1,2,3

  • 1EMaRT Group-Emerging: Materials, Research, Technology, University of Aveiro, Aveiro, Portugal.

3D Printing and Additive Manufacturing
|October 3, 2024
PubMed
Summary

Researchers developed 3D-printed cork materials using binder jetting. An autoclave post-processing step significantly improved particle adhesion and enabled complex designs, enhancing cork

Keywords:
3D printingadditive manufacturingbinder jettingcorknatural materialspowders

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Sustainable Materials

Background:

  • Binder jetting (3DP) is a promising additive manufacturing technique for creating complex geometries.
  • Cork, a sustainable and lightweight material, presents challenges in 3DP due to its particle characteristics and low affinity for water-based binders.
  • Improving particle adhesion and printability is crucial for expanding the application of cork in 3DP.

Purpose of the Study:

  • To develop and investigate cork-based formulations suitable for binder jetting processes.
  • To enhance the adhesion and mechanical properties of 3D-printed cork parts.
  • To explore the potential of autoclave post-processing for improving 3DP cork components.

Main Methods:

  • Two sets of cork powders with varying particle size distributions were analyzed for packing ability.
  • Hydrophilic additives were incorporated to improve binder affinity.
  • Parts were fabricated using binder jetting, followed by an autoclave post-processing step.
  • Morphological, mechanical, and Fourier transform infra-red (FTIR) analyses were conducted.

Main Results:

  • Coarse cork powders exhibited superior packing ability compared to finer distributions.
  • The autoclave post-processing significantly improved cork particle adhesion in 3DP parts.
  • Autoclave treatment affected the polysaccharide and suberinic fractions of cork, enhancing mechanical properties.
  • Successful printing of complex cork-based designs was achieved.

Conclusions:

  • Binder jetting, combined with autoclave post-processing, is a viable method for producing high-performance 3D-printed cork components.
  • This approach enables the creation of complex cork products while retaining desirable natural properties like lightness and softness.
  • The study opens new avenues for sustainable and innovative applications of cork in design and manufacturing.