Development of Grogged Ceramic Clay Roofing Tiles for Poultry Housing as an Alternative to Zinc Sheets.  ABSTRACT   Secondary clay obtained from Bomo, Zaria, Kaduna state was used for this research. Dry samples were fired to produce grog which was crushed and sieved to mesh 20 (840microns). Body composition was formulated with 5, 10, 15, 20 and 25% additions […]

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