ISSN 0004-881X

Autoclaved Lime-Colloidal Silica Slurries and Formation of Al-Tobermorite

by H. Connan, A.S. Ray and P.S. Thomas
Department of Chemistry, Materials and Forensic Science, University of Technology, Sydney, NSW 2007 Australia

Abstract

Fired clay-brick waste has been the focus of research for utilisation in the hydrothermally treated CaO-Al2O3-SiO2-H2O 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 27Al MAS NMR, XRD, DTA-TGA and SEM.

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