What is the equilibrium moisture content?
The content of moisture balance is the moment when the wood does not lose or obtains water. A piece of Wood moisture content is in constant flow due to external conditions such as temperature and humidity. The content of the wood moisture is measured by reading the wood mass in its completely dry state from normal mass and dividing the total mass with a dry condition. If the moisture of the surrounding area is high, then more particles of water are present to soak into the wood. The equilibrium constant will be high when the moisture is high. On the contrary, it will be low when the external humidity is low. This happens because the oven prevents the formation of any water, thus preventing any water that is absorbed by wood. In this type of environment, water vapor first occurs quickly and then slows down the drying process. The loss of water vapor stops completely when the content of the moisture balance returns to normal.
There is a predictable correlation between RelatiIncorrect moisture and equilibrium moisture content in wood. For example, when the relative humidity is 25%, the moisture content will be 5%. Similarly, the moisture content will be 14%when the relative humidity is 75%.
The Hailwood-Horobin equation calculates the relations between temperature, relative humidity and equilibrium moisture content. In the equation, the constant is found by means of the environmental temperature in the degrees of Fahrenheite. Replacing the values to the equation can create a graph of equilibrium moisture. A equation that is quite complex can be found online.
inside households, wood usually contains 6%humidity content. This number is based on the fact that most houses usually have a relative internal humidity 30%. Wood that is located outside but protected from rain, usually has a higher moisture content; 14% to 18%. In greenhouse environments, the relative humidity is 90% and the content of the humidity will be about 20%. Regardless of the environment, equilibrium content does not increase above 30%.
It is important to realize that for DThe roar is an important balance of moisture. To test the wood force used for this purpose, wood develops in an environment of 60% humidity and a humidity content of 12%. Beams, rafters, studs and other structures must be able to withstand these conditions to be reliable and durable in the construction.