Natural stone is an important component of home decoration materials. Its performance is very superior, so it is favored by users in home decoration, and it has a good beautification effect on home life. So, what are the characteristics of natural stone? Let's take a look with the editor of FABULOUS Group.

　　1. Fire resistance

　　Various types of stone are different, and some stones are chemically decomposed under the action of high temperature.

　　(1) Gypsum: Decomposes when it is greater than 107°C.

　　(2) Limestone, marble: decompose when it is greater than 910 c.

　　(3) Granite: Cracked due to uneven heating of the constituent minerals at 600 C.

　　2. Frost resistance

　　When it reaches minus 20 degrees Celsius, freezing occurs, and the water in the pores swells 1/10 larger than the original volume. If the rock cannot resist the force of this expansion, it will be destroyed. Generally, if the water absorption is less than 0.5%, its frost resistance is not considered.

　　3. Expansion and contraction

　　Stone also expands with heat and shrinks with cold, but if it is heated and then cooled, its shrinkage cannot return to its original volume, but a part of it must remain as a permanent expansion; the US Armory has tested it from 00C to 1000C, and then reduced to 00C, and it was measured to be permanent. The degree of expansion increase is 0.02-0.045%.

　　4. Compressive strength

　　The compressive strength of stone will vary due to factors such as mineral composition, crystal thickness, uniformity of the cemented material, load area, load effect and the angle formed by the cleavage. If other conditions are the same, the dense material with small crystal particles usually bonded together has higher strength. There is no difference in compressive strength of dense volcanic rock after being dried and saturated with water (extremely low water absorption). If it is a porous and water-resistant cemented rock, its dry and wet strength will be significantly different.