Abstract
The acoustic emission (AE) signals from mortar, concrete and steel fiber reinforced concrete beams during the entire fracture process were recorded and analyzed. Different filters were set on the AE signal duration based on the characteristic of amplitude distribution. From the value of AE signal amplitude, which corresponds to the occurrence of the peak for AE hits, the AE signals from mortar, concrete and steel reinforced concrete were divided into five, seven and nine sections, respectively. The relationship between the AE signal section and the failure mechanism of these materials, analyzed on the meso-structure level was determined. Based on the experiments, the AE characteristics of each failure mechanism are given. The results show that the AE technique is a valuable tool to study the failure mechanism of concrete.
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