Natural stone knowledge of the cave stone

Cave stone is named because of the many holes in the surface of stone. The scientific name of its stone is tuffite or travertine. Commercially, it is classified as marble.The stone has been used for a long time, the most representative of the Roman culture of the building - Colosseum is the Cave Stone masterpiece.

The tone of the cave stone is mostly beige, which makes people feel mild, rich in texture, and clear in stripes. The buildings often have strong cultural and historical charm, which is used by many buildings in the world.The interior and exterior decoration of the Bank of China Building, which is located at the Xidan intersection in Beijing, was designed by the American Pei Liming Architecture Office. The cave stone from Rome, Italy, was used with a total area of 20000㎡.Why do not call it marble, because its simple sense and appearance and the marble on traditional sense are completely different, decorate bound simply by convention.It is believed to form as a calcareous material precipitated from carbonate springs (usually hot springs) under atmospheric conditions.The specific formation is the circulation of groundwater containing carbon dioxide from the plant solution to remove a large amount of calcareous carbonate, when the water reaches the surface of the spring, some of the carbon dioxide released and condensed in the calcareous carbonate sediment layer, the formation of rare bubbles (pores), resulting in cavitation.Unlike limestone deposits in the ocean, tuffite is mostly deposited rapidly in rivers or lakes and ponds. This rapid deposition prevents the release of organic matter and gases, resulting in a beautiful texture.

 But the disadvantage is that it also creates layers of internal cracks, weakening it in the same direction as the texture.Tuff stone because of holes, its unit density is not large, suitable for covering materials, but not suitable for building structural materials, basic materials.In the past, people used cave stone as a large number of building materials and structural materials, but with concrete, now no longer used.Cave stone in addition to yellow, there are green, white, purple, pink, coffee and other colors.Cave stones have also been found and produced in Henan.