You should know how to rotate the stone

Currently, the use of stone used primarily as decoration, as compared with other decoration materials, the biggest difference is that stone are natural minerals, in many ways such as color, texture, construction and other aspects of the acquisition of material has its unique conditions; therefore also its application in the selection of the road when. Overall, the stone used should be taken into account the following aspects:
First, the estimated cost considerations
Stone is a natural ore systems, different Stone picture because of its quality, quantity and mining areas .... so different, the price will tend to have significant differences, therefore, owners and designers in the initial selection, the cost should have a considerable degree of control.
Second, the expression of aesthetic
Stone colors, patterns and texture of the other factors in the selection belongs to the more subjective level, often due to owners and designers have different preferences, but if the natural stone has more in-depth understanding of the expression of artistic conception in the design will even more remarkable flexibility.
Classification of ore formation are igneous, sedimentary and metamorphic rocks are three commonly used in construction of local stone exhibition marble main Zeyi class (rocks) and granite type (igneous rock) based; In general, marble stone has more class rich color and pattern, texture smooth and soft to the performance-based, while the granite color and pattern classes although less on the changes, but the texture has a more flexible terms of performance, In addition, the granite in the overall The feel seems to be rather solemn and classical.
Third, the quality of the master stone
1. Uniformity and integrity of materials:
Should try to avoid the dark crack, black scars and color and so on.
2. Stone composition:
(1) Avoid high stone containing iron sulfide, iron oxide, salt, and carbonaceous clay .... and other harmful substances.
(2) to avoid stone containing radioactive elements.
(3) to avoid the stone contains high coefficient of thermal expansion, thermal conductivity and electrical conductivity of the mineral composition, in order to avoid cracks, the risk of thermal and electrical conductivity.
Fourth, consider the durability of
Use of stone as decoration materials, generally want to be with the structure of stone with the same vitality, especially as the wall and floor decoration, its durability even more important because with good durability of the stone, not only can forever preserve buildings The beautiful exterior, but also to ensure that the solid stone and security, not to drop it after the injuries to pedestrians. However, the exterior walls and floors to stone installation, the stone itself has a big test:
1. In terms of physical aspects:
Stone must endure the destruction of many external forces, in addition to force, including gravity, vibration, wind, temperature changes, wear, load .... and so on.
2. To chemical terms:
Including hydration, dissolution, dehydration, acidification, reduction, and chemical erosion of carbonate .... etc..
3. Had a stable molecular structure of stone, exposed to the atmosphere, the composition of stone contributed to the cooperation between the different minerals poor, such as limestone with acids (sulfurous gas and water) dissolved form of calcium sulfate, leading to the collapse of sandstone.
Therefore, the choice should be to select a stone pore distribution, pore size is small, low water absorption, hardness and compressive strength of the higher order to achieve the durability requirements.
1. Choose low water absorption of the stone
More easily absorbed moisture absorption caused by the greater volume expansion, and because the absorption of the soluble components in the air, or salt, making the stone erosion, resulting in reduced strength of stone.
2. Select small aperture, low porosity and higher porosity of the stone, the greater water absorption, the more susceptible to weathering and reduced strength.
3. The proportion of larger stones, although the larger the compressive strength, but it will increase the load structure, reducing the earthquake resistance.
4. Use directional bedding stone (such as slate, shale), you must pay attention to its structural strength in different directions.
Fifth, consider the use of parts
When the stone used in the external walls, floors, tall buildings, or other special about the external environment, the stone or inferior type of use will be more important.