Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO₄ Solution

Figure 8

XRD patterns of FAGC in the 60-day standard curing condition, heating condition, and 32-cycle MgSO₄ attack environment, respectively. Q: quartz; N: N-A-S-H (sodium aluminum silicate hydrate); M: M-A-S-H (magnesium aluminum silicate hydrate).