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.

• Determine the total air content, spacing factor, and specific surface in hardened concrete.
• Effectively and rapidly study and quantify the air void system: volume, spacing, and size distribution of the air bubbles.

Air-Void system Image.

• X,Y,Z-stage with electronic stepper motor for accurate X-Y displacement, 230/120 VAC, equipped with emergency switch
• LED ring lightening system
• Color digital camera, 2 mm resolution
• Microscope objective for op to 100x magnification
• Windows based software with user friendly interface
• Self-calibration with a reference sample
• Exporting of data to MS Excel
• Pint out reports for ASTM C 457 and EN 480-11.

Air-Void system Image.

RapidAir Ordering Numbers

• Technical data-sheet 
• Publications

• More documentation is available upon request

• ASTM C457, “Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete.”
• EN 480-11, “Admixtures for concrete, mortar and grout – Test methods – Part 11: Determination of air void characteristics in hardened concrete.”