Acoustic Emission and Ultrasonic Characteristics in the Failure Process of Cemented Waste Concrete-Coal Gangue Backfilling (CWCGB) under Uniaxial Loading

<div>Relational graph of the CGB and CWCGB stress and AE counts. (a) No adding waste concrete. (b) 30% waste concrete substitution. (c) 50% waste concrete substitution.</div>

Advances in Civil Engineering

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Figure 4

Figure 4: Acoustic Emission and Ultrasonic Characteristics in the Failure Process of Cemented Waste Concrete-Coal Gangue Backfilling (CWCGB) under Uniaxial Loading 

Figure 4 | Acoustic Emission and Ultrasonic Characteristics in the Failure Process of Cemented Waste Concrete-Coal Gangue Backfilling (CWCGB) under Uniaxial Loading 