Research Article

Freezing-Thawing Damage Mechanism of Coal Gangue Concrete Based on Low-Field Nuclear Magnetic Resonance, Scanning Electron Microscopy, and N2 Adsorption

Figure 7

Coal gangue ceramsite under freeze-thaw cycles. (a) Unfrozen coal gangue ceramsite. (b) Coal gangue ceramsite under 50 cycle times.
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(b)