Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 30, 2024

Phosphogypsum is the main industrial solid waste from wet process phosphoric acid production, which has significant potential for environmental sustainability and engineering applications when modified. In order to explore mechanical properties of modified phosphogypsum (MG) in different loading environments, uniaxial compression tests were conducted at four rates: 0.03, 0.06, 0.12, 0.6 mm/min. The test results show that MG undergoes creeping rate 0.03 mm/min, quasi-static 0.12 transition between two states 0.06 As increases, crack initiation stress $${\sigma _{{\text{ci}}}}$$ , damage _{{\text{cd}}}}$$ peak strength _f}$$ gradually increase, but increasing amplitude decreases. Under _{{\text{ci}}}}{\text{/}}{\sigma _{{\text{cd}}}}{\text{/}}{\sigma no changes remain 0.52 0.81, respectively, close values rock materials. increases creep loading, elastic strain energy slowly steadily, while total dissipative decrease first then increase slowly. With axial 0 0.81 principal field relatively uniform a concentration band, very steep angle with horizontal direction. research provide an important theoretical basis application as building

Language: Английский