Characteristics of Granite, Balast, Sand Stone, Lime Stone, Marble and Slate
Characteristics of stones
In order to ensure suitable selection of stone of particular work, one must be conversant with its composition, characteristics, uses and place of availability.
Composed of quart, feldspar and mica and minerals
Available in grey, green, brown and pink and red
Hard and durable
High resistance to weathering
The texture varies with its quality
Specify gravity 2.7 and compressive strength 700 to 1300 kg/cm2
Used for ornamental, road metal, railway ballast, aggregate for concrete; for construction of bridges, piers and marine works etc.
It is compact, hard and heavy
3.Available in red, yellow grey, blue and greenish black colour
Specific gravity is 3 and compressive strength varies 1530 to 1890 kg/cm2.
Used for ornamental, rail road ballast, aggregates for concrete etc.
It is available in variety of formations fine grained, coarse grained compact or porous
Available in white, green, blue, black, red and yellow.
Specific gravity 2.65 to 2.95
Compressive strength is 650kgs / cm2
Used for ashlars works
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
Available in white, blue, green, yellow black and red colour
Suitable for decorative works, wall lining columns, pile, table slabs, hearths, tiled floors, steps of stair case etc.
Non absorbent, compact fine grained and produce metallic ringing sound when struck
Available in black, dark blue, grey, reddish brown etc.
Used for providing damp proof course, paving dados etc