The Acoustic Emission Characterization of Mechanical Damage of Geopolymer Recycled Concrete

As a non-destructive testing method, acoustic emission technology can be used to detect the internal damage of concrete specimens in the process of stress. Geopolymer concrete is expected to replace cement as a new generation of green building material because of its outstanding features of low carbon emission and low energy consumption while utilizing industrial solid waste. And with the increasing amount of concrete, due to the mining of sand and gravel aggregate caused by environmental damage and resource depletion has become increasingly serious. In this paper, acoustic emission technology is used to detect the damage of geopolymer recycled concrete during bending and pull-out tests. The results show that the acoustic emission energy distribution map can well reflect the characteristics of load rising and falling stages, it can provide a reference for related research.