Understanding Acoustic Emission Testing- Reading 1 Part B-A

2. If a beam is under its service load, it would behave similarly on application
of a superimposed load. The presence or absence of acoustic emissions
during this further loading and unloading might indicate the condition of the
beam.
3. If a beam under service load showed no acoustic emission activity during
further loading, but did so at a later date when loaded to the same level, then
the strength must have decreased during that time interval.
As well, Williams noted similar behavior on testing of ordinary prestressed
concrete beams, and suggested that these techniques could be used to
evaluate any type of concrete structure, as long as acoustic emissions not
connected with beam damage could be eliminated.
Charlie Chong/ Fion Zhang