Study on Axial Compression Damage Characteristics of Graphene Oxide Modified Solid Waste Concrete Using Acoustic Emission

It monitors acoustic emission (AE) signals during the uniaxial compression failure process of GSC specimens at a loading rate of 0.5 mm/min, investigates the characteristics of AE ring counts, crack patterns and b-value changes throughout the entire compression damage process, and establishes a GSC axial compression damage evolution model based on the cumulative number of AE rings.

Results show performance is optimal at 0.05% GO dosage: the 28-day compressive strength reaches 39.4 MPa, 32.2% higher than the non-dosage group’s 29.8 MPa, confirming appropriate GO improves GSC’s compressive strength and toughness. Based on AE parameters, GSC’s axial compression damage is divided into three stages: elastic compaction, crack development and near-peak failure. GSC has a higher initial b-value than traditional concrete (indicating more initial defects); the b-value declines as specimens approach stage III and hits a minimum at test end, a precursor to unstable failure.