Work Item
ASTM WK89282

Revision of C138/C138M-23 Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

Rationale

The purpose for this ballot item is to remove the requirement to check the vibrator frequency while the vibrator is operating in the concrete. The use of a vibrating reed tachometer to check the frequency is the default verification method. The vibrating reed tachometer needs to be placed against the vibrating element, and it is not practical to do so while the vibrating element is operating in the concrete.

Details

Developed by Subcommittee: C09.60

Committee: C09

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 01-16-2024

Technical Contact: Michael Kesselmayer