Influence of compressive strength of concrete on b-value of acoustic emissions released during reinforced concrete fracture
  R.Vidya Sagar
  This article reports on the effect of compressive strength of concrete on the Acoustic Emission (AE) based b-value (log-linear slope of the line plotted using frequency-amplitude distribution of AE) related to fracture process in Reinforced Concrete (RC) structures. RC flanged beam specimens of different compressive strength were tested until failure and simultaneously the released AE were recorded. For in-situ monitoring of damage in RC structures using AE monitoring techniques, the variation in b-values provides useful information related to micro-cracking and macro-cracking. It is advantageous since it is not easy to obtain 3-D source location data of high frequency AE. The computed b-values were compared with the evolution of cracks on the specimen.