Building Material – Good Brick Requirement / Qualities : Part 6

  1. It should have proper proportions of sand, silt and clay.
  2. It should have uniform shape , size & colour.
  3. Brick Should be hard enough so that it is not scratched by fingernail.
  4. A sharp metallic sound indicates good burning.
  5. It must be homogeneous.
  6. It should have sufficient plasticity so that bricks can be properly and conveniently moulded with sharp and well defined edges.
  7. It must be free from lumps of lime or nodules of kankar.
  8. It must be free from pebbles, grits and lumps of earth.
  9. It must free from alkaline salts, kallar  or reh etc.
  10. It must not contain vegetable and organic matter.

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