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Date of Publication:2022-10-06

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Volume:52

Issue:5

Page Number:701-706

ISSN No.:1000-8608

Abstract:The concrete ultimate load capacity is improved through
   self-repairing.Because there is a dearth of studies regarding damage
   evolution of self-repairing concrete,acoustic emission(AE) technology is
   presented to monitor its evolution process.The full-process damage of
   self-repairing concrete is monitored under three-point bending beam
   testing using AE technique.It is found that the initiation,propagation
   and evolution of self-repairing concrete cracks can be described using
   AE hits.Firstly,the corresponding relationship between the AE hits and
   load is testified by comparing with their embraceable curve.Secondly,the
   repairing effect of self-repairing concrete is judged using Kaiser
   effect and Felicity ratio.Finally,the different damage types of AE
   waveforms of self-repairing concrete are extracted and analyzed using
   wavelet singularity theory.The damage causes are analyzed according to
   the waveform frequency distribution.The testing results show the AE
   technique can provide a new testing method for self-repairing concrete
   damage judgment.

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