Publisher: Bachudo Science Co. Ltd

Mineralogy and Ceramic Properties of Lateritic Clays Derived From Basement Complex Rocks In Ibadan Area, Southwestern Nigeria

J. A. Adekoya, E. O. Ogunsina, M. O. Adepoju
KEYWORDS: Latentic clays, ceramics, mineralogy, ceramic properties

ABSTRACT:

Latentic clays denved from weathered basement complex rocks around Ibadan. were subjected to mineralogical and ceramic property tests to characterize them for production of ceramics The results of the study show that the clay bodies consist essentially of kaolinite with admixtures of minor or trace amounts of halloysite, ilhte and vermiculite. Although the clays and their ceramic products exhibit highly variable properties. they can be divided mto four types (A, B, C and D) on the basis of plasticity, workability and quality of fired products The type A is characterized by high plasticity. workability, and casting slip water limit as well as by low greenware and firing linear shrinkage and low water absorption capacity. This type of clay, which occurs at Apomu, 9 km east of Ibadan, is suitable for bricks, tile, sewer pipes pottery and stoneware The type B clay, found at Aba AJao and Alapako, also has high plasticity but it differs from type A by having medium greenware and finng linear shnnkages and low to high water absorption capacity These clay bodies are thus suitable for pottery and for bonding in foundries The type C comprises clays of medium plasticity and of nil tomedium drying and finng shrinkages and could be used for refractories, stoneware and pottery This clay type exists at Abanla, Seko and Onsumbare The clays of the type D have low plasticity and low to medium drying and finng shrinkages and are only useful for refractories if blended with more plastic clays These are located at Podo (Ibadan Toll gate). Alapako North and an area some 6 km east of Ibadan on the lbadan-lfe Expressway


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