The matters need attention of using thermally modified woodxingnan
Thermally modified wood namely charring wood, carbonized wood is through carbonization processing timber, carbonization, carbon under the word is a fire, as the name suggests, there is no water in the water must satisfy the condition of high temperature, wood strength for protection, control of coking process, must have a protective medium.
1. The carbonized wood should not be used in contact with soil and water environment.
2. The carbonized wood than untreated wood nail holding power has declined, so it is recommended to use punch first nail hole installation to reduce and avoid cracking of wood again
3. The carbonized wood outside recommended when using uv wood coatings, in case of timber fade after over time.
Carbonized wood main quality index of wood equilibrium moisture content is about 3% lower than the untreated wood, dry shrinkage rate is less than 5%, better than 7% of the teak.With the enlargement of the carbonized wood market, all sorts of nominal carbonized wood products a lot, but there are a lot of problems, some is to use steam to cook, some is to use wood heat up with anger process get worked up, just provide the difference, for use as a reference
The project name carbonized wood cooking wood
Nominal carbonized wood carbonized wood
The principle of No water temperature: let nutrition carbonized, analogy Fried coke grain of saturated steam: let water group aggregation
Let the water group aggregation
Density is low, about 10% lower than the original unchanged
Process 190/212 carbonization temperature (not seen nominal 212 degrees temperature products)
Odor tasteless or slight focal No turpentine flavor, there isn’t much acid south pine or miscellaneous odor
Equilibrium moisture content of less than 7% after drying after 12-15%, after no dry wet
Golden brown to dark brown color South pine color shallow, camphor, light color brown
Fat-free skim is incomplete, the smell of turpentine
End fiber fiber brittle, end section is smooth A coarse fiber performance hasn’t changed, end section
Good dimensional stability, shrinkage rate < 5%, 7%) is better than that of teak
Good anticorrosion anti-insect, nutrients not be carbonized, but is to be cooked
The cracking resistant performance is good