Mechanical Characteristics and Acoustic Emission Characteristics of Mortar-Rock Binary Medium

The stability of the interface between mortar and rock is very important in engineering construction. In this paper, all-digital acoustic emission (AE) system used to detect direct shear test mortar-rock binary medium with different sawtooth angles under normal stress states. stress-displacement information AE signal during whole shearing process are extracted. coupling relationship characteristic parameters discussed. quantitative angle strength established, three that can be predict structural instability proposed. research shows that: With increase angle, increases. obtained by least squares fitting. curve divided into five stages according change deformation law. Through analysis parameters, it found increasing makes count cumulative increase. Based on RA-AF, changes cracks tensile within were obtained, respectively. shearing, peak frequency range 120–340 kHz. Three macroscopic damage media obtained: b value, ratio crack signals, number signals a 220 Hz 320 Hz.