The Performance and Mechanism Analysis of Cement Pastes Added to Aluminum Sulfate-Based Low-Alkali Setting Accelerator

Figure 6

Scanning electron microscope (SEM) photographs of hydrated cement specimens.

(a) Y20-S7 5 min

(b) Blank 5 h

(c) Y20-S7 5 h

(d) Blank 1 d

(e) Y20-S7 1 d

(f) Blank 28 d

(g) Y20-S7 28 d