Experimental Study on the Durability of Fly Ash-Based Filling Paste in Environments with Different Concentrations of Sulfates

Figure 7

XRD patterns of hydrated products of filling paste in each immersion solution for each soaking period: (a) 30 d; (b) 60 d; (c) 90 d; (d) 120 d.

(a)

(b)

(c)

(d)