What are the characteristics of natural stone

Natural stone has a natural pattern than man-made stone, and the stone is more environmentally friendly. Natural stone is generally used for high-grade decoration, the stone is resistant to high temperatures, as the kitchen countertops are very suitable. This stone is more expensive, the face of high-end consumers. Natural stone is also commonly used in hotel decoration, can improve the overall space grade. Next, I will take you to understand what are the characteristics of natural stone.

One, what are the characteristics of natural stone

1, fire resistance: all kinds of stone are different, some stone in the role of high temperature, chemical decomposition. Gypsum: greater than 107c decomposition. Limestone, marble: decomposition at greater than 910c. Granite: 600c when the composition of minerals due to uneven heat and cracking.

2, expansion and contraction: natural stone is also thermal expansion and contraction, but if heated and then cooled, the contraction can not be returned to the original volume, and must retain a part of the sex expansion, the United States Arsenal has been tested by the zero degrees Celsius to one hundred degrees Celsius, and then down to zero degrees Celsius, measured the degree of expansion increased to 0.02-0.45%.

3, frost resistance: natural stone in the wet state, can resist freezing and thawing without significant damage, this performance is called frost resistance. Water in the pores of the rock at temperatures as low as minus 20 degrees Celsius, when freezing occurs, the expansion of water in the pores than the original volume of 1/10, the rock if it can not resist the expansion of the force that occurs, there will be a destruction of the phenomenon, generally if the rate of absorption of water is less than 0.5%, do not take into account the freezing resistance.

4, compressive strength: the compressive strength of natural stone will be due to the mineral composition, crystallization thickness, the uniformity of the cemented material, the load area, the role of the load and the angle of the solution, and other factors, and different if other conditions are the same. Usually fine crystalline particles and bonded together with each other dense material, with high strength, dense volcanic rock in dry and saturated water compressive strength and no difference (low water absorption,) if the porous and afraid of water cemented rock, its dry and wet strength, in a significant difference.

Two, natural stone identification methods

1, that is, the naked eye to observe the surface structure of natural stone. Generally speaking, uniform fine material structure of natural stone has a delicate texture, the best natural stone; coarse and unequal grain structure of the stone has a poorer appearance, mechanical properties are not uniform, quality is slightly worse. In addition, natural stone due to geological effects often produce some minor cracks in which natural stone is most likely to rupture along these parts, should pay attention to culling. As for the lack of corners is to affect the aesthetics, the choice should pay particular attention to.

2, that is, a simple test method to test the quality of natural stone. Usually in the back of the natural stone drops on a small grain of ink, such as ink quickly dispersed around the leaching, that is, indicating that the natural stone internal particles loose or the existence of gaps in the stone quality is not good; Conversely, if the ink drops in place, it is good to show that the dense texture of the stone (which is very similar to the ceramic tile).

3, that is, listen to the natural stone knocking sound. Generally speaking, good quality natural stone knocking sound crisp and pleasant; on the contrary, if there are microscopic cracks within the natural stone or due to weathering lead to contact between the particles become loose, the knocking sound hoarse.

Natural stone is strong compression resistance, and has a strong fire resistance. This kind of decoration material is commonly used in kitchen decoration, is a beautiful kind of stone. The above is a small introduction to the natural stone what are the characteristics of natural stone, natural stone identification method content,.