Abstract:
Fired clay-brick waste has been the focus of research for utilisation in the hydrothermally treated CaO-Al₂O₃-
SiO₂ -H₂ O system. Autoclaved lime-colloidal silica slurries with increasing additions of mullite, the main
aluminous source in fired clay-brick were investigated. The effects of the reactivity of this alumina source on
the formation and nature of Al-tobermorite were studied from a combination of solid-state ² ⁷Al MAS NMR,
XRD, DTA-TGA and SEM.
