ASTM D448-12 (R2017) PDF Download

The ASTM D448-12 (R2017) standard provides a classification system for aggregate size designations and standard size ranges for mechanical sieve analyses of coarse aggregate and screenings used in the construction and maintenance of highways and bridges.

The standard acknowledges that contract documents may specify certain aggregate sizes for specific uses or recommend suitable sizes for different end-product mixtures. It also recognizes that some cases may require tighter limits on the variability of aggregate grading.

Additionally, this classification refers to sieve sizes according to their standard designations in Specification E11. The alternative designations given in parentheses are provided for informational purposes only and do not represent different standard sieve sizes.

It is important to note that the standard includes explanatory notes and footnotes throughout its text. However, these notes and footnotes, excluding those in tables and figures, are not considered as requirements of the classification.