1. Absolute dry state: when the free water and combined water in the wood are removed, the state of the wood is called absolute dry state;
2. Fiber saturation state: fiber saturation point refers to a critical state. Generally speaking, the amount of free water has little effect on the physical properties of wood, while the content of combined water has a great impact on the physical and mechanical properties of anti-corrosion wood.
3. Green wood status: The newly cut wood is in green wood status. The cell cavity and cell wall contain water. The amount of free water will change with the season, while the combined water is in saturated state.
4. Air-dried state: Put the green wood in the atmospheric environment and dry it naturally. When the moisture in the green wood reaches the equilibrium state, the state at this time is the air-dried state. Generally speaking, the water content in the dry state is high in the south, about 15%~16%, while in the north, it is about 12%~13%.
Reasons for deformation and cracking of anti-corrosion wood:
As a natural material, wood cracking is caused by different moisture content and wood growth rings, which is a normal phenomenon. As a kind of antiseptic material, the purpose of antiseptic is to ensure that the wood can resist termite erosion, spore fungus growth and decay, aquatic organism lodging and other insect breeding when placed in a harsh environment, and effectively prolong the service life of the wood.
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