This video summarizes a laboratory and field study that investigated the loss of air while pumping air entrained concrete. The air was shown to be lost during pumping and then regain over time. This was observed in both the lab and field mixtures by hardened air void analysis, freeze thaw testing, and the Super Air Meter. This means that current specifications for testing air entrained concrete after a pump should be modified. The video goes on to ask for assistance and help in proving this to the industry by measuring field mixtures. Please email tyler.ley@okstate.edu if you are willing to help. www.tylerley.com

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