Title:
Vibration Tune-Up
Author(s):
Kenneth C. Hover
Publication:
Concrete International
Volume:
23
Issue:
9
Appears on pages(s):
30-35
Keywords:
DOI:
Date:
9/1/2001
Abstract:
Vibrator frequency is a key to the ability to consolidate fresh concrete. When the frequency is too low, the vibrator can’t properly consolidate the concrete; and when the frequency is too high, air-entrained concrete can become less resistant to damage caused by cyclic freezing. Frequency also influences construction operations because the lower the frequency, the longer the vibrator has to stay in place to thoroughly consolidate the concrete. For these reasons, the industry is taking a more careful look at monitoring vibrator frequency on form vibrators, on hand-held immersion vibrators, and on the vibrators mounted on slipform pavers.