Title: Comparative Study of Finely Ground Fired Clay Brick and Kaolin Based Fillers

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Publication: CIA

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Date: 2/14/2011

Abstract:
The process of hydrothermal curing or autoclaving is particularly well suited to the utilisation of industrial by-products in the production of construction materials as it renders some of these waste materials highly reactive. Research findings have demonstrated that when used in combination with Portland cement (OPC) in the industrially important CaO-Al2O3-SiO2-H2O system, finely ground fired clay brick masonry, an aluminosilica rich waste, is suitable for the production of autoclaved construction materials. The use of kaolin clay as a filler in the production of these autoclaved calcium silicate based building products is well established. This paper presents a comparative study of finely ground clay brick industrial waste and kaolin clay used in combination with OPC under autoclaved conditions. The observed variations in compressive strength are discussed in the context of the presence of critical phases, which were characterised by microstructural and thermal analytical methods.