BRICKS CONCRETE BLOCKS STONES LIME CEMENT AGGREGATES CONCRETE TIMBER STEEL MODERN MATERIALS GLASS

STONES

The stones are derived from rocks which form the earth’s crust and have no definite shape or chemical composition.

USES: Residential and public buildings Dams, harbours, bridges Road metal and railway ballast As aggregate for concrete Interior of buildings

CLASSIFICATION OF ROCKS BASED ON: Geological Physical Chemical Practical

GEOLOGICAL CLASSIFICATION Igneous rocks Sedimentary rocks Metamorphic rocks

PHYSICAL CLASSIFICATION Stratified rocks – Can be seperated eg: Sandstone, Limestone Unstratified rocks – cannot be seperated easily eg: Granite, Marble

CHEMICAL CLASSIFICATION Silicious – Agrillaceous – Calcarious – Silica - Sandstone Alumina - Laterite Calcium carbonate or Lime - Limestone & marble

GENERAL CLASSIFICATION Granite – 2.64 Basalt – 2.96 Marble – 2.72 Sandstone – 2.6 Limestone – 2.25

Common Building Stones Granite Basalt Marble Limestone Sandstone

USES OF STONES Stone for masonry Stone for pavements

Stone for flooring Stones for facing work in buildings Stones for concrete aggregates