Types of clays are:
1. Refractory clay (Terra cotta clay): This clay is highly disperse and very plastic. This clay contains high percent of alumina.
Uses: Used to manufacturing of refractory bricks, cornices, jambs, sills.
2. High melting clay: High melting point clays have high refractoriness @ 1580O C. It contains less impurities like quartz, feldspar, mica, CaCO3 and magnesium carbonate.
Uses: Manufacturing of facing bricks, floor tile, sewer pipes.
3. Low melting clay: Refractoriness less than 1300O C. The composition is not uniform.
Uses:Manufacturing of bricks, blocks, tiles.
4. Stoneware / Earthenware Clay: Selected clay mixed with ground glass, stone dust, potteries, sand, etc.
Uses: Manufacturing of Pipes for drains & sewers.
5. Kaolin / China Clay: White color pure clay possessing a high degree of tenacity & plasticity.
Uses:Manufacturing of glazed pottery, porcelain.