"vibration free" concrete testing ASTM C143, C31

[vollEngineer]

No wrong answers, here. I'm curious to know from other concrete engineers:
How do you define "free of vibration" during concrete testing when there is no such thing on Earth, and not even close on a construction site?

 

[Ron]

vollengineer...post this in the Concrete Engineering-General Discussion forum. You'll get more traffic for this subject there.

To answer your question, though, the requirement is relative. The intent is prevent damage to the concrete specimens using as much care as could reasonably be expected given the ambient conditions. As an example, you would not store the specimens adjacent to a location of vibratory compaction. Further, you would not store them in a area subjected to other traffic vibration.

There are locations on construction sites that are relatively free of vibration. This is where the specimens should be stored for the first 24 hours or before transport to the laboratory.