Figure 12

Line-fits to the Al-CSH gel XRD reflection at 29.5 2 θ (a) and tobermorite XRD peaks at 29.1 2 θ (220) and 30.1 2 θ (222) (b) are shown for the 10:1 batch reaction. The data in (a) illustrate the growth of CSH until t ~19–24 h followed by consumption. The data in (b) show the growth of tobermorite (t < 2 d) followed by crystallization from t = 3–8 d. Line-fit performed using the Avrami equation (Equation 4) in which k = 0.6 (± 0.1) × 10^-5 s^-1 and t _o = 2.3.