Concrete pavement quality control testing requirements needed for the super air meter : final report.

Final reportPDFTech ReportFHWA-KS-16-14C2090Air contentAir voidsConcrete pavementsFreeze thaw durabilityMeasuring instrumentsPavingQuality controlUnited StatesKansasKansas. Dept. of Transportation. Bureau of ResearchRiding, Kyle A.Albahttiti, MohammedKansas State University. Transportation CenterKansas. Dept. of Transportation. Bureau of ResearchUnited States. Federal Highway AdministrationUS Transportation CollectionConcrete freeze-thaw durability is prominently linked to the air void system within the concrete.Concrete pavements in Kansas undergo repetitive freeze-thaw cycles. Total air content measurementscurrently used on fresh concrete do not provide any indication of the air void size distribution. The Super AirMeter (SAM) addresses this issue by providing the air content and an additional number, the SAM number,which is claimed by the manufacturer to correlate to the concrete hardened air void spacing factor. In order todetermine the variability and the frequency of testing needed for the SAM test, 16 sites across Kansas wereinvestigated. The SAM test was performed at least once for every hour of paving. This study found that theSAM number has a 154 percent higher coefficient of variation per site than the total air content. It was alsoseen that there is a correlation between the air content and the SAM number. It is recommended that theKansas Department of Transportation (KDOT) perform the SAM test at least four times per site per day