Stone age and durability

Stone has a high status in decorative materials and has irreplaceable decorative properties. It is commonly used on the "facade" of buildings, so owners hope that stone and building have the same vitality. Stone with good durability can not only ensure the aesthetic appearance of the building, but also extend the renovation period of the building. Therefore, when stone is used as the decorative material for the outer wall and the ground and the hall, the following aspects must be investigated for the stone:

1, physical properties Stone must be able to withstand the damage including gravity, wind, vibration, temperature changes, wear, load and many other external forces. This requires high strength of the stone, especially the stone installed in the high position.

2. Chemical properties Stones must have considerable resistance to chemical attack such as weathering, hydration, dissolution, dehydration, acidification, reduction and carbonate. To do this, the stone must be waterproof.

3. Structural strength When selecting directional stones such as slate and shale, attention must be paid to the structural strength in different directions.

4. Water absorption rate The molecular structure of the stone is relatively stable when it is mined, but when it is exposed to the atmosphere, the poor coordination between the minerals inside the stone occurs, such as limestone encountering acid (the reaction of sulfurous acid gas in the air with water) The dissolution table forms calcium sulfate, which causes collapse of sandstone and the like. Therefore, when selecting stone, you should try to choose stone with uniform pore distribution, small pore size and low water absorption.

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