The RapidAir is an image analysis system for automatic and quick determination of the air void structure parameters in hardened concrete according to the linear traverse method (procedure A) or the point count method (procedure B) as per ASTM C457.
A concrete sample cut, grinded, polished, and tinted in the laboratory is mounted on a moving X-Y-Z stage positioned below a video camera. The RapidAir control unit automatically moves the stage, and the software determines the portion of the total traverse length that passes through the white air voids. The measurement is done within 12 min for linear traverse analysis and within 30 min for modified point count.
After the scan is completed, the air-void parameters are calculated as per ASTM C457 or EN 480-11. In addition, graphical presentation of the air-void distribution and the raw data are available.
Air-Void system Image.