Web-based entrained air stuff:

Free scanner-based air void analysis software available for download

Results of scanner-based air void analyses on 7 samples for Ontario Ministry of Transportation

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Entrained air publications, click on paper title for pdf version:

Peterson, K., Air-Void Analysis of Hardened Concrete: Helping Computers to Count Air Bubbles Like People Count Air Bubbles - Methods for Flatbed Scanner Calibration Ph.D. dissertation, Michigan Technological University, April 2008.

Peterson, K., Sutter, L., Van Dam, T. "Methods for Threshold Optimization for Images Collected From Contrast Enhanced Concrete Surfaces for Air-Void System Characterization" Proceedings of the 11th Euroseminar on Microscopy Applied to Building Materials, Porto, Portugal, 2007.

Peterson, K., Sutter, L., Van Dam, T. "Virtual Hardened Concrete Sample Exchange Program" Proceedings of the 29th International Conference on Cement Microscopy, Quebec City, Canada, 2007.

Carslon, J., Sutter, L.L., Van Dam, T.J., Peterson, K. W. "Comparison of a Flat-Bed Scanner and the RapidAir 457 System for Determining Air-Void Parameters of Hardened Concrete" Transportation Research Record: Journal of the Transportation Research Board, No. 1979, pp 54-59, 2006.

Carlson, J., Advancement on the Application of a Flat-Bed Scanner for Hardened Portland Cement Concrete Air Void Analysis M.S. thesis, Michigan Technological University, June 2005.

Carlson, J., Sutter, L., Peterson, K., Van Dam, T. "An Update on Application of a Flat-Bed Scanner for Performing ASTM C 457" Proceedings of the 27th International Conference on Cement Microscopy, Victoria, British Columbia, Canada, 2005.

Peterson, K.W., Sutter, L.L., VanDam, T.J. "An Experiment with a High Resolution Flatbed Scanner to Examine Variability in ASTM C 457 Test Results from a Single Concrete Specimen" submitted to an ASTM Cement Concrete Aggregates Symposium in November of 2002, for details ask Larry (llsutter@mtu.edu).

Peterson, K., Sutter, L., Van Dam, T., "Air Void Analysis of Hardened Concrete with a High-Resolution Flatbed Scanner" Proceedings of the 24th International Conference on Cement Microscopy, San Diego, California, 2002, pp 304-316.

Peterson, K., Van Dam, T., Sutter, L. "Determination of the Paste to Void Proximity Distribution in Two Dimensions from a Cross-Section through a Concrete Specimen" Proceedings of the 8th Euroseminar on Microscopy Applied to Building Materials, Athens, Greece, 2001, pp 611-617.

Peterson, K.W., Swartz, R.A., Sutter, L.L., Van Dam, T.J.,"Hardened Concrete Air Void Analysis with a Flatbed Scanner" Transportation Research Record: Journal of the Transportation Research Board, No. 1775, TRB, National Research Council, Washington, D.C., 2001, pp 36-43.

Peterson, K., Air void analysis of hardened concrete via flatbed scanner M.S. thesis, Michigan Technological University, May 2001.