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19 × 19 × 10 cm, 19 × 19 × 5 cm, 19 × 14 × 10 cm, 19 × 14 × 5 cm,
14 × 14 × 10 cm, 14 × 14 × 5 cm, 14 × 9 × 5 cm, 9 × 9 × 5 cm.
± 3 per cent.
f average value should not be less than 1.2 N/mm^2 width.
# average value should not exceed 15 per cent.
i rating should not be more than slight.
# should not exceed 3 per cent.
PIW gve2svi
Tiles are thin slabs of low melting clays used for various purposes in engineering constructions.
These give a very pleasing appearance and good service properties. Roofing tiles, flooring tiles,
wall tiles and partition tiles are some of the examples. Due to the considerable mass, labour-
consuming manufacture, erection and drainage problems, and appreciable transportation
charges, roofing tiles have lost their importance and are recommended locally. The various
types of roofing tiles in common use are shown in Fig. 2.16. Floor tiles are extensively used in
houses and industrial buildings. These are durable and impervious to water, resist abrasion
well and wash easily. White burning and red burning clays, fire clays and shales are used in
making tiles for floor surfaces. Tiles for surface of walls differ from floor tiles principally in
design in degree of burning. Wall tiles are burned at a comparatively low temperature, glazed,
and fired again in muffle kiln at a still lower temperature.
p2PIT2@A 2