Capillary Porosity
Capillary Porosity - Related Videos
01:20
Porosity and Absorption of Aggregate
0 Views •
2024
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. When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
01:18
Porosity in Cement Paste
0 Views •
2024
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 critical—it...
13:02
Archimedes-Based Glycerol Displacement for Electrode Porosity Measurement in Lead-Acid Batteries
0 Views •
2026
Here, we present a simple and low-cost glycerol displacement method based on Archimedes' principle for measuring lead-acid battery electrode porosities. The method demonstrates good reproducibility and is safer than traditional techniques, requiring low-hazard chemicals and equipment. Combining the technique with microstructural analysis by X-ray diffraction provides information on battery electrode properties and degradation.
08:50
Capillary Electrophoresis (CE)
0 Views •
2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
11:52
Microbubble Fabrication of Concave-porosity PDMS Beads
0 Views •
Cited by 2 •
2015
Procedures used to generate microstructured concave-porosity polydimethylsiloxane beads are presented. Effects of electrolyte concentration and identity within the aqueous phase are particularly emphasized.
FAQs
Capillary forces arise from surface tension within the liquid and adhesion between the liquid and the pore walls. Together, they create pressure differences that can draw liquid into pores, retain it there, or redistribute it through the material. The resulting behavior depends on pore size and connectivity, so identical moisture conditions can produce different responses in different porous structures.
Connectivity determines whether liquid can move through a continuous network rather than remaining confined to isolated spaces. Interconnected capillary pores can support redistribution and contribute to fluid transport, while poorly connected pore regions may primarily retain liquid. Engineers therefore consider connectivity alongside pore size when interpreting moisture movement, storage, and related material performance.
Saturation changes how much of the capillary pore network contains liquid and therefore influences both storage and redistribution. As liquid occupies different portions of the connected pores, the material can respond differently to changing environmental conditions. Accounting for saturation helps engineers interpret moisture retention, drying behavior, and fluid movement instead of treating pore space as uniformly active.
Measurements and models can connect capillary pore characteristics with permeability, moisture retention, drying, durability, and contaminant migration. Useful assessments consider pore size, connectivity, and saturation because these variables govern how fluids are stored and transported. The resulting information supports predictions of how a porous material will perform as environmental conditions change.
Capillary pore behavior is relevant to concrete, soils, rocks, ceramics, and other porous media. In each case, capillary forces help explain how liquids enter, remain within, or move through the material. Applying the same principles across these materials allows engineers to examine moisture transport and storage while accounting for differences in pore structure and saturation.
Capillary porosity analysis helps identify pathways and storage regions that influence liquid movement through a material. That information supports evaluations of durability, drying, permeability, and contaminant migration under changing environmental conditions. For engineering applications, linking pore structure with fluid behavior provides a basis for predicting material performance rather than relying only on bulk properties.