STONE MATERIALS

STONE MATERIALS

1. Stone materials are often used for construction because they are strong

2. EXTRACTING AND PROCESSING STONE

   • Stone blocks
     • Some types of stone, such as granite and marble, are extracted in large blocks.
     • Quarrying
       • Large stone blocks are removed from the Earth´s crust using various methods, such as controlled explosions, mechanical drilling and expansive cement.
     • Polishing: the stone is processed as follows:
       • Cutting: Diamond and ceramic saws are used to cut the stone into smaller, thinner sheets.
       • Shaping: Machines called lathes give the stone sheets their final shape.
       • Polishing: Machines with abrasive discs are used to smooth the stone.
     • Aggregates: Aggregates are created when stone is eroded by water, wind and other forces.
       • Cleaning: Foreign objects, such as wood and dirt, are removed. This process usually includes washing and drying.
       • Crushing: The grains of gravel are crushed into smaller pieces.
       • Sorting: The grains are separated by size (diameter).