Author: haroonkhan
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Moulding of Tiles
Depending on the pattern of tile to be moulded, the moulding method is selected. Wooden patterns are used for tiles which are not of uniform thickness throughout the length and are moulded in wooden plattens. The pugged clay is pressed into the mould and the tiles are taken out for drying. When the pattern of…
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Preparation of Clay
As stated earlier, the best blue clay for tiles is generally found beneath brick earth. Impurities such as grit, pebbles, etc. are removed from the selected clay. The clay is ground into a powder form in crushing roller mills. It is then pugged. For the preparation of superior tiles, the powdered clay is mixed with…
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Ceramic Tiles
(i) Glazed Ceramic Tiles They are made from special ceramic clays in two operations. In the first operation the tiles are made and fired at 1,200–1,300ºC; then they are coated with glaze, decorations, etc. Again they are fired in ovens to get opaque glazing. Wear of the glazing is based on the temperature of firing…
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Characteristics of a Good Tile
A good-quality building tile should possess the following characteristics:
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BUILDING TILES
As discussed earlier, building tiles are thinner than bricks and are susceptible to cracking and warping. Hence, special care has to be taken in the manufacture of tiles.
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INTRODUCTION
Naturally available clay is used directly or in the processed form to make tiles and ceramic materials apart from making bricks. Tiles are thin slabs made out of brick earth by moulding and then burning them. The best clay for tile making is generally found a few metres below the brick earth. Tiles have been…
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Sewer Bricks
These bricks are manufactured using surface clay, fire clay or shale or a combination of these materials. They are used for the lining of walls, roofs and floors of sewers for ordinary domestic sewage. They are not suitable for industrial use as they are not acid resistant.
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Heavy-duty Bricks
These bricks are of very high quality, viz., high compressive strength, low water absorption, high durability and high bulk density. These bricks are free from any defects. They are used in heavy engineering works such as bridge structures, multi-storeyed buildings and industrial foundations.