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Related Concept Videos

Pore Size Distribution01:23

Pore Size Distribution

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In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...
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Porosity in Cement Paste01:18

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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.
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Porosity and Absorption of Aggregate01:20

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Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
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Permeability of Concrete01:25

Permeability of Concrete

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Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...
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Related Experiment Video

Updated: Jul 12, 2025

Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography
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Multi-scale pore network modelling to evaluate connectivity in ceramic composites.

Joan Widin Schroeder1, Matthew J Burch1, Mario A Perez1

  • 13M Company, St. Paul, MN, USA.

Micron (Oxford, England : 1993)
|October 19, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a flake network model (FNM) to analyze boron nitride ceramic flake connectivity in polymers. The FNM reveals how flake networks impact material transport properties, crucial for performance.

Keywords:
FIB/SEM tomographyFlake network modelingMicrostructural characterizationPore network modelingX-ray Microtomography

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Ceramics

Background:

  • Complex material morphologies, like connected networks, significantly influence transport properties such as thermal conductivity.
  • Understanding these microstructural characteristics is essential for optimizing material performance.

Purpose of the Study:

  • To develop and apply a flake network model (FNM) for analyzing the connectivity of boron nitride ceramic flakes within a polymer resin matrix.
  • To correlate the flake network's morphology with material transport properties.

Main Methods:

  • Utilized Micro-CT and FIB/SEM tomography for correlative microstructural and nanostructural analysis.
  • Extracted a flake network model (FNM) from tomographic datasets, distinct from traditional pore network models (PNM).
  • Determined coordination number distribution and generated flow rate models to assess flake connectivity.

Main Results:

  • Micro-CT revealed a cage-like flake network at the sample exterior with limited interior connectivity, attributed to flake agglomeration.
  • Comparison of full and interior-only Micro-CT FNMs indicated reduced interior connectivity.
  • FIB/SEM FNM showed connectivity consistent with the interior-only Micro-CT FNM, validating measurements across scales.

Conclusions:

  • The flake network morphology, particularly its connectivity, directly influences material transport properties.
  • Flake agglomeration at the surface can impede interior network connectivity.
  • The FNM approach provides a robust method for characterizing complex microstructures and their functional implications.