ABSTRACT
In this experiment, three point bending test on notched beam, which was made of concrete material, was conducted in normal conditions to test the fracture parameters, and acoustic emission testing system was used to make a real-time detection of the crack process of samples. Compare the crack initiation load judge by AE characteristics parameters and the resistance strain gauge method (Zhao 2003) with the fracture load, the relationship between acoustic emission space evolution laws and the critical state of crack were analyzed, to establish the acoustic emission criterion of concrete crack.
