Application Of Aswan Clays For The Production Of Acid-resistant Engineering Bricks

Summary

Three clay deposits from the Aswan area as well as Kalabsha  kaolin were investigated regarding their composition and properties.  The chemical composition was determined by wet-silicate analysis.  XRD and DTA were used for determining the mineralogical composition whereas the particle size distribution was determined using the sedimentation technique. The plasticity as well as the drying and firing behaviour of the clay samples were also studied.  The proper clay batch was selected and bricks were  shaped and industrially fired at 1250 C.  The technological properties of the fired bricks in terms of densification parameters as well as mechanical strength and acid resistance were determined and assessed according to Egyptian Standards.  The results reveal that Aswan clays are  kaolinitic containing variable amounts of quartz, illite, and iron components. The engineering bricks produced by firing the proper clay batches up to 1250 C show lower water  absorption and higher crushing strength as well as acid resistance than the limits given by Egyptian Standards for such bricks.  8 refs.

Primary author(s): Meshref A E, Abu Laban S S, El-Kholi M B, Serry M A

                            Arab Co.for Ceramic Products, Cairo,National Research

Source: Tile Brick Int.

            17,No.5,2001,p.312-316

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