Effect of autoclaving temperature on calcium silicate-based building products containing clay-brick waste

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Journal Article
Journal Of Thermal Analysis And Calorimetry, 2007, 88 (1), pp. 115 - 119
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The utilisation of fired clay-brick waste is of interest in the manufacture of building products due to both socio-economic and technological reasons. Autoclaving is an established process for manufacturing calcium silicate-based building products that affords rapid strength development. Clay-brick waste represents a source of alternative silica, whcih is more reactive than conventionally used silica and also cntains alumina. This paper presents data on the effect of lowering the autoclaving temperature from commonly practised 180 to 170 degrees C on OPC-quartz blends conatining clay-brick fines as direct replacement of quartz at 4.3, 8.6 and 12.9 mass percentages. The hydration products of autoclaved OPC-quartz blends with clay-brick fines were characterised using simultaneous DTA-TG inc ombination with other methods.
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