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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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Optimization of Ceramic Paste Composition for 3D Printing via Robocasting.

Szymon Przybyła1,2, Maciej Kwiatkowski1,2, Michał Kwiatkowski2

  • 1Faculty of Materials Engineering and Physics, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.

Materials (Basel, Switzerland)
|September 28, 2024
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Summary

This study developed a method to select optimal ceramic pastes for robocasting 3D printing. Paste formulation significantly impacts extrusion force and setting time, crucial for additive manufacturing.

Keywords:
3D printingoxide ceramicsrobocastingviscosity

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Ceramic Engineering

Background:

  • Robocasting is an additive manufacturing technique for ceramics.
  • Optimizing ceramic paste formulations is critical for successful robocasting.
  • Particle size and additives influence paste properties.

Purpose of the Study:

  • To establish a procedure for selecting optimal ceramic paste formulations for robocasting.
  • To investigate the effect of particle size and additives on paste properties.
  • To develop a method for validating ceramic pastes for additive manufacturing.

Main Methods:

  • Formulation of ceramic pastes with varying particle sizes and additives.
  • Measurement of paste viscosity and extrusion force.
  • Assessment of extruded material quality and setting time.

Main Results:

  • Ceramic mixtures were classified as suitable or unsuitable for robocasting.
  • Extrusion force varied based on particle size, ranging from 77 N (base) to 166 N (MG5).
  • Extruded band length was inversely proportional to aluminum oxide (Al₂O₃) content.

Conclusions:

  • The developed procedure effectively validates ceramic pastes for robocasting.
  • Paste formulation, including particle size and additives, critically affects processability.
  • This work facilitates advancements in robocasting additive technology.