General Knowledge Of Natural Stone
Q: How are stones classified?
A: The American Society for testing and materials divides natural facing stones into six categories: granite, marble, limestone, quartz based, slate and other stones.
Q: What is granite?
A: Granite is mainly composed of quartz, feldspar and mica. The content of feldspar is 40% - 60%, and the content of quartz is 20% - 40%. Its color depends on the type and quantity of components. Granite is a rock with fully crystalline structure. High quality granite has fine and uniform grains, compact structure, large content of quartz and bright luster of feldspar.
Q: What are the characteristics of granite?
A: Hard texture, wear-resistant, corrosion-resistant, good strength, not easy to be damaged, large proportion, uniform and regular color and pattern, weak water absorption, not easy to bond, difficult to process and good gloss.
Q: How to use granite generally?
A: The use of granite is divided according to the grain size: those with small grains can be polished or carved as decorative plates or works of art; Medium grain size is commonly used in the construction of piers, bridge arches, dams, seaports, footings, foundations, pavements, etc; The coarse grain is rolled into crushed stone, which is an excellent aggregate for concrete. Because granite is acid resistant, it is also used as acid resistant lining and container in chemical and metallurgical production.
