Strength Characteristics and the Reaction Mechanism of Stone Powder Cement Tailings Backfill

Figure 14

SEM image of the hydration product in the backfill; (a) CTB at 7 d; (b) SPCTB at 7 d; (c) CTB at 28 d; (d) SPCTB at 28 d.

(a)

(b)

(c)

(d)