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

4. STONES

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

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

7. CLASSIFICATION OF ROCKS
BASED ON:
Geological
Physical
Chemical
Practical

8. GEOLOGICAL CLASSIFICATION
Igneous rocks
Sedimentary rocks
Metamorphic rocks

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

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

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

12. Common Building Stones
Granite
Basalt
Marble
Limestone
Sandstone

13. USES OF STONES
Stone for masonry
Stone for pavements

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