Figure 3
Secondary electron images (10 000×, 5 kV) of quartz grains (a), (b) and their imprints retained in the fractured porous matrix (c), (d). Fibrillar C-(A)-S-H (a), (c) formed around quartz grains within 2 h at 457 K (300 min), whereas tobermorite crystallites (b), (d) formed after prolonged treatment at 466 K. |