Porosity Measurement
Porosity Measurement - Related Videos
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.
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...
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.
09:22
Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity
0 Views •
Cited by 22 •
2014
Replication is one of the processing techniques used for the production of porous metal sponges. In this paper one implementation of the method for the production of open celled porous aluminum is shown in detail.
FAQs
The measured value depends on whether the method can reach the material’s pores. Connected pores may be accessible to a fluid or gas, while isolated voids may not be detected by that approach. Saturation, applied pressure, and measurement scale also influence which pore spaces contribute, so results should be interpreted in relation to the measurement conditions.
These approaches distinguish pore space from solid material in different ways. Fluid displacement evaluates volume changes associated with fluid movement, gas adsorption examines interaction with gas within the pore system, and image analysis estimates void space from visual data. Because each method observes the material at a different scale or accessibility condition, their results may not be directly interchangeable.
Disagreement can arise when the methods access different portions of the pore network or operate under different pressure and saturation conditions. Image-based measurements may also represent a selected observation scale rather than the entire specimen. Consequently, porosity values should be compared only when the measured volume, accessibility, and testing conditions are sufficiently consistent.
The material type, pore accessibility, required measurement scale, and relevant testing conditions should guide the approach. Fluid displacement, gas adsorption, and image analysis provide different ways to distinguish solid and void volumes. Matching the method to soils, rocks, concrete, ceramics, foams, or filtration media helps ensure that the reported value represents the feature important to the engineering decision.
Engineers apply the measurement to soils, rocks, concrete, ceramics, foams, and filtration media. In each case, the result helps characterize internal void space relevant to performance. Depending on the material and application, the information can support assessment of fluid storage, permeability, strength, durability, or manufacturing quality rather than serving as an isolated descriptive number.
Porosity data support material selection and predictions of how a material may store or transmit fluids, withstand loading, resist degradation, or meet production requirements. The measurement is relevant to energy, construction, and environmental applications, where internal void structure affects performance. Repeated characterization can also help identify manufacturing variation and improve process control.