ISSN 0004-881X

Strength development in autoclaved aluminosilicate rich industrial waste-cement systems containing reactive magnesia

by B. Liu, A.S. Ray and P.S. Thomas
Department of Chemistry, Materials and Forensic Science, University of Technology, Sydney, P.O. Box 123, Broadway, Sydney, NSW 2007 Australia.

Abstract

Addition of supplementary cementing materials (SCM) to produce blended Portland cements (PC) is a well established practice in the manufacture of construction materials since they permit less overall consumption of PC thereby reducing CO2 emissions. This study reports findings on the strength development of autoclaved Portland cement (PC), quartz blends where PC was partially replaced by alumina-silica rich fired clay brick waste fines, a proven SCM, and reactive magnesia. Chemical and physical properties of the mixes were characterised by means of compressive strength testing, thermal analysis, x-ray diffractometry (XRD) and scanning electron microscopy (SEM).

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