LIMESTONE

The two main regions where Lime Stone quarries are situated in India are Rajasthan and Andhra Pardesh.

In Rajasthan there are two color shades of flaggy limestone - Blue and Brown.

Similarly in Andhara Pardesh , we get four color shades of lime stone, Blue , Yellow, Green and Pink.

The varity of flaggy limestone can be used for both external and internal use. The unique quality of Kota Stone being that with age it gets a very soft sheen on it. Kota Stone is also very good for commercial use as it is economical and durable. It has very low porosity and is very easy to maintain.

Stone is a material that man has used in building for several thousand years and it still lends itself to modern usage and design, and limestone in its various geological forms is probably the type of natural stone most widely used for this purpose. It occurs naturally in many parts of the world with the limestones of the Jurassic period being those of most importance in this field. Many of the commonly used varieties were formed by the accretion of the hard remains of former organisms such as corals and shells. These materials principally comprise calcium carbonate (calcite), as does the cement. Calcite is a relatively soft mineral and careful selection will be needed when you choose this for use as flooring. Variations in the types and quantities of shell and other remains and the nature of the cement provide a huge range in the types of limestone available.

The limestones of these areas were used for building in Roman times and, in later centuries and to-date, have been the traditional building material of their localities, Many buildings throughout these counties bear witness to this. In addition, some limestones are extensively used outside their areas of origins as is evidenced by the many fine buildings to be seen throughout the British Isles, particularly in major cities and towns. Cathedrals, churches and numerous public and private buildings provide outstanding examples of the durability and beauty of these limestones and they show through the skill of the mason, how this stone is so eminently suitable for producing masonry of excellence in all aspects of plain and detailed work that may be required.

Appearance

The colours of limestones range from almost white to the warm honey tone of Bath stones with grey/blue and darker browns a feature in some limestones. Textures range from fine even grained stones to the smooth fossil bearing types and to the coarse open textured Portland roach. Certain limestones such as Purbeck and Hopton Wood take a polish and can be used as "marbles".

Applications

Limestones are used extensively in both new building and restoration where their ease of working facilitates the production of cladding, ashlar and other forms of walling. They are also suitable for flooring. Many limestones are particularly suited to carved and moulded work. Components such as cills and jambs, soffits and copings, heads and mullions are readily produced to add interest and enrichment to building facades.

Performance

Limestones generally have good load bearing properties and weathering characteristics although correct detailing is important as with all building materials. Limestones must not be used above sandstones on exterior elevations.

The properties of individual types of stone can vary considerably and advice should always be sought on the selection of suitable stones, both for general and particular applications.

Types of Limestones

Kota Stone

In India lime stone deposits are found in Rajasthan in the region of Kota and Ramganjmandi. There are mainly two colors green and blue. The stone is flaggy lime stone and is mined in open pit quarries.

Tandur Yellow, Tandur Blue and Kadappa Black

Lime stone is also quarried in south India in the state of Andhra Pardesh, in the region of Tandur and Caduppa. These stones are of similar characteristic to that of Kota Stone. Even the colors of Tandur Yellow and Tandur Blue are similar to the one found in Kota. To a untrained eye it would be impossible to tell the difference.

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