ASTM RR:D04-1021 PDF Download

ASTM RR:D04-1021 is a standard test method that aims to determine the thickness or height of compacted asphalt mixture specimens. This method was developed to provide a reliable and consistent way of measuring the thickness or height of asphalt mixtures, an important parameter in the construction and maintenance of roads and highways.

The standard starts by describing the apparatus required for performing the test, including a caliper or a measurement device with a suitable resolution for accurate measurements. It also outlines the procedure for preparing the specimens, which involves compacting the asphalt mixture in a mold to a specified number of blows using a compaction apparatus.

Once the specimens are prepared, the standard provides instructions on how to measure their thickness or height using the caliper or measurement device. It emphasizes the importance of taking multiple measurements at different locations on each specimen to obtain representative results.

Furthermore, the standard emphasizes the need for interlaboratory testing to establish a precision statement for the test method. This involves multiple laboratories testing the same materials to determine the variability of the results and the repeatability of the test. The results from this interlaboratory study help in assessing the precision and reliability of the test method.