Improving Variability and Precision of AVA Test Results and Developing Rational Specification Limits

Principal Investigator:

Kejin Wang, kejinw@iastate.edu (other projects)

Co-Principal Investigator:

• Jim Grove, jimgrove@iastate.edu (other projects)
• Bob Steffes, steffesr@iastate.edu (other projects)

Project Status: In Progress

Start Date: 10/26/2006
End Date: 10/25/2007


Research Objective: The overall objectives are to improve variability and precision of air void analyzer (AVA) test results and to develop ration specification limits for controlling concrete freeze-thaw damage using the AVA test parameters. The research will deal with the test procedures, material variability problems, ambient weather problems, and construction problems related to use of the AVA device. It will investigate the relationship between AVA test results and those of some commonly used hardened air tests and durability tests. The proposed work will also consider the work being done under the AASHTO AVA TIG. Through close collaboration with the TIG and specifically Kansas DOT, the research will utilize the results of the February 2006 AVA Round Up. The research will complement the TIG effort to promote AVA utilization, and the research team will work with Kansas DOT as the lead agency for TIG to provide resulting recommendations and support for tech transfer.

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