I wanted to make a modern style stone sofa background

Stone - material properties.

1 Fire resistance.

Fig) stone stone.

All kinds of stone are different, and some stones are chemically decomposed under the action of high temperatures.

1) Gypsum: decomposes at greater than 107 C.

2) Limestone, marble: decomposes at >910 C.

3) Granite: Cracks at 600 C due to uneven heating of constituent minerals.

2 Expansion and contraction.

Stone is also thermal expansion and contraction, but if it is heated and then cooled, its shrinkage cannot return to its original volume, but must retain part of it to become permanent expansion; The U.S. Arsenal has tested from 00C to 1000C, and then down to 00C, and measured the degree of permanent expansion increase.

3 Frost resistance.

At -20 degrees Celsius, freezing occurs, and the water in the pores expands to 1 10 more than the original volume, and if the rock cannot resist the force of this expansion, the phenomenon of destruction will occur. Generally, if the water absorption rate is less than , its frost resistance is not considered.

4 Compressive strength.

The compressive strength of stone will vary depending on factors such as mineral composition, crystal thickness, uniformity of cemented substance, load area, load action and cleavage angle. All other things being equal, dense materials with fine crystalline particles that are usually bonded to each other have high strength. There is no difference in the compressive strength of dense volcanic rocks after drying and saturation with water (the water absorption rate is very low), and there is a significant difference in the strength of dry and wet cemented rocks that are porous and water-phobic.