BUILDING STONES.  Stone → One of the oldest building material.  Rock : A large concreted mass of earthy or mineral matter or broken pieces of such a.

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Presentation transcript:

BUILDING STONES

 Stone → One of the oldest building material.  Rock : A large concreted mass of earthy or mineral matter or broken pieces of such a mass.  Stone : Quarried or smaller pieces of rock for a specified function such as a building block

 Rocks are made up of minerals. Such as: Feldspars Feldspars Quartz Quartz Micas Micas Hornblende Hornblende Kaolinite Kaolinite Calcite (CaCO 3 ) Calcite (CaCO 3 ) Dolomite (MgCO 3 ) Dolomite (MgCO 3 )

GEOLOGICAL CLASSES OF ROCKS  Igneous: Formed by cooling and thus solidfying from a molten state. (Granite, Basalt)  Sedimentary : Formed by a process of cementation of small particles that result from the disintegration of rocks. (Limestone, sandstone)  Metamorphic Rocks : Formed by gradual changes in the structures of either igneous or sedimentary rocks caused by heat, water, pressure. (Marble, Slate)

COMMONLY USED BUILDING STONES  Granite : Intrusive igneous rock Intrusive:crystallized slowly within the earth Intrusive:crystallized slowly within the earth Granite is a strong, hard & non-porous rock Granite is a strong, hard & non-porous rock It is a desirable foundation & building material. It is a desirable foundation & building material.  Basalt : Extrusive igneous rock Extrusive:rapidly crystallized on the surface of earth Extrusive:rapidly crystallized on the surface of earth Basalt is hard & strong but it is porous & have fractures. Basalt is hard & strong but it is porous & have fractures.

 Limestone : Sedimentary rock It is used as a concrete aggregate It is used as a concrete aggregate It is used in the production of cement & lime It is used in the production of cement & lime  Marble : Metamorphosed limestone Harder than limestone Harder than limestone Used for interior work or wall or column facing Used for interior work or wall or column facing  Slate : Metamorphosed clay Used for flooring, interior or exterior wall facing. Used for flooring, interior or exterior wall facing.

GRANITE SLATEMARBLE BASALTLIMESTONE

PRODUCTION STEPS  Quarrying: Big chunks are cut at the side, loosened at the bottom by wedging & removed by cranes  Shaping & Finishing: Taken to the factory & cut and finished to the desired shapes.

QUARRYING

PROPERTIES OF STONES  Durability : mainly abrasion  Strength Both strength & durability are affected by the texture & mineral composition, chemical charactersitics & physical characteristics. Both strength & durability are affected by the texture & mineral composition, chemical charactersitics & physical characteristics.  Porosity  Water Absorption  Coefficient of thermal expansion  Fire resistance