The foam sandwich panels of the insulated chicken coop are burned! How to do hollowing out?
Magnesium cement curing to release a high heat, generally in the 1000 ~ 1350J / gMgO, and the heat release rate is very fast, the highest reaction system center temperature up to 150 degrees Celsius. Ordinary Portland cement hydration heat is only 300 ~ 400J / g, can be seen magnesite cement is the ordinary cement hydration heat 3 to 4 times.
As can be seen from the above data, especially in the summer high temperature production, must strictly control the magnesite cement curing process.
At present in Hebei Wen'an, Cangzhou area, in order to save production space, usually finished a board, and then according to this board for the operating platform in the above do 3 to 5, we all know, thermal conductivity of foam material is poor, and Ling Magnesium cement curing is a fast high heat process, so the production often encountered due to exotherm is too high and burned foam board situation, that is, "burn board" "hollowing" phenomenon.
Specific solutions: 1 to reduce the brine wave degrees;
2 Add GX-1 # Magnesium Modifier;
3 to do a good job of ventilation and cooling work.
