ASTM C138/C138M-17a PDF Download

ASTM C138/C138M-17a is a standard test method that aims to determine the density (unit weight), yield, and air content of freshly mixed concrete. The test method provides formulas for calculating these properties based on known quantities of the component materials.

The test method requires the use of various apparatuses including a balance or scale, tamping rod, internal vibrator, measure (cylindrical container), strike-off plate, mallet, and scoop. These tools are used to measure and manipulate the concrete sample during the testing process.

The standard also includes explanatory information in the form of notes and footnotes, which provide additional context and understanding of the test method. It should be noted that these notes and footnotes are not considered as requirements of the test method.