PELCON conducts Automated Air Void Analysis according to ASTM C-457. Our long experience and continous improvement of the procedures ensures a high quality of the prepared specimens. All specimens are checked several times during the preparation.
The analysis is conducted using true automated linear traverse equipment. Final results are validated by an internal manual process and by reference specimens.
During the measurement the polished and contrast impregnated specimen is moved in parallel lines below the microscope to cover full surface area; chords are recorded with ~2 microns resolution.
We have more than 20 years experience. Our experience after more than 5,000 samples measured fulfils our understanding and performance of this analysis.
Our results are regularly documented by Round Robin Tests.
Highlights from specimen preparation
The automated analysis
Typical mistakes in specimen preparation
Making an air void analysis on samples like these will surely give you a misleading result.
- Specimen preparation is a crucial issue.