United States Department of Transportation
i
Concrete pavement quality control testing requirements needed for the super air meter : final report.
-
2016-10-01
[PDF-1.69 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final report
-
Corporate Publisher:
-
Abstract:Concrete 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 measurements
currently used on fresh concrete do not provide any indication of the air void size distribution. The Super Air
Meter (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 to
determine the variability and the frequency of testing needed for the SAM test, 16 sites across Kansas were
investigated. The SAM test was performed at least once for every hour of paving. This study found that the
SAM number has a 154 percent higher coefficient of variation per site than the total air content. It was also
seen that there is a correlation between the air content and the SAM number. It is recommended that the
Kansas Department of Transportation (KDOT) perform the SAM test at least four times per site per day.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
