Limestone is a sedimentary rock which is composed largely of the mineral calcite. (Calcium carbonate: CaCO3).
Moh’s Scale of Hardness: 3
Compressive strength:15 MPa – 290 MPa.
Uses of limestone:
Limestone is very common in architecture, especially in Europe and North America. Many landmarks across the world are made of limestone, for example: the Great Pyramid and its associated Complex in Giza, Egypt. Kingston in Canada is nicknamed the Limestone City, because many buildings there were constructed from limestone. Limestone is readily available and relatively easy to cut into blocks or more elaborate carving. It is also long-lasting and stands up well to exposure.
Some other industrial uses:
• The manufacture of quicklime (calcium oxide) and slaked lime (calcium hydroxide);
• Cement and mortar;
• Crushed for use as aggregate—the solid base for roads;
• Glass making;
• Added to paper, plastics, paint, tiles, and other materials ;
• Toothpaste
• Medicines
• Cosmetics