Experimental Research on Mix Ratio of Construction Waste Cemented Filling Material Based on Response Surface Methodology

Figure 15

SEM photos of the hydration products of the optimum mix ratio of filling material at different curing ages. (a) 1 d curing age. (b) 3 d curing age. (c) 7 d curing age. (d) 28 d curing age.

(a)

(b)

(c)

(d)