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Characteristics of Stones

Stones

In  order  to  ensure  suitable  selection  of  stone  of particular work, one must be conversant with its composition, characteristics, uses of stones and place of availability.

Granite

  1. Igneous rock
  2. Composed of quart, felspar and mica and minerals
  3. Available in grey, green, brown and pink and red
  4. Hard and durable
  5. High resistance to weathering
  6. The texture varies with its quality
  7. Specify gravity 2.7 and compressive strength 700 kg/cm2 to 1300
  8. Used for ornamental, road metal, railway ballast, aggregate for concrete; for construction of bridges, piers and marine works etc.

Balast

  1. Igneous rock
  2. It is compact, hard and heavy
  3. Available  in  red,  yellow  grey,  blue  and  greenish  black colour
  4. Specific gravity is 3 and compressive strength varies 1530 to 1890 kg/cm2.
  5. Used  for  ornamental,  rail  road  ballast,  aggregates  for concrete etc.

Sand Stone:

  1. Sedimentary rock
  2. It is available in variety of formations fine grained, coarse grained compact or porous
  3. Available in white, green, blue, black, red and yellow.
  4. Specific gravity 2.65 to 2.95
  5. Compressive strength is 650kgs / cm2
  6. Used for ashlar works

Lime Stone:

Sedimentary  rock:  It  is  available  in  a  variety  of  forms which differ from one another in colour Compaction, texture, hardness and durable
  • Compact lime stone 
  • Granular lime stone 
  • Magnesia lime stone 
  • Kanker lime stone
  • Used for paving, road metal, etc.

Marble

  1. Metamorphic rock
  2. Available in white, blue, green, yellow black and red colour.
  3. High compactness,
  4. Suitable for decorative works, wall lining columns, pile, table slabs, hearths, tiled floors, steps of stair case etc.

Slate:

  1. Metamorphic rock
  2. Non absorbent, compact fine grained and produce metallic ringing sound when struck
  3. Available in black, dark blue, grey, reddish brown etc.
  4. Used for providing damp proof course, paving dados etc.

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