ASTM RR:C09-1049 PDF Download

ASTM RR:C09-1049 is a standard that provides a detailed description of an Interlaboratory Study conducted to establish precision information for Test Method C231/C231M. The objective of the study was to determine the precision of the Type B meter, which was not previously covered in the test method.

The report outlines the methodology used in the study, the participants involved, and the results obtained. It mentions that the precision statement for the Type A meter is already included in the current test method, but this study aimed to expand the precision information to include the Type B meter.

This standard is important for ensuring the accuracy and reliability of air content measurements in freshly mixed concrete. By conducting an interlaboratory study, it provides a comprehensive analysis of the precision of the Type B meter, which enables concrete producers and testing laboratories to make informed decisions about the instrument's suitability for their applications.