The performance and features of gypsum board

The performance and features of gypsum board

Gypsum board is mainly used for building wall, regular gypsum board, waterproof gypsum board and three types of fireproof gypsum board. Regular gypsum board is a heavy paper for the protective paper. Water resistant gypsum board adopts water resistant protective paper, and adding appropriate amount water resistant in the construction gypsum slurry additive made of water resistant core material. Fireproof gypsum board core material is in the building gypsum slurry after adding proper amount of inorganic fire-resistant fiber reinforced materials. Fireproof gypsum board is the main technical requirements of the under the high temperature flame combustion, can keep within a certain amount of time without breaking. GB11979-89 national standard: stable time fireproof gypsum board in case of fire, classy article not less than 30 min, grade a is not less than 25 min, NCM not less than 20 min.

Three classes of ordinary, water resistant, fireproof gypsum board, according to the edge shapes are rectangle, 45 ° Angle, cuneate, semi-circular and round five products. Product specification: 1800, 2100, 2400, 2700, 3000, 3300 and 3600 mm7 specifications; Was 900 mm wide and 1200 kinds of specifications; 9, 12 and 15 mm thick. In addition, the thickness of gypsum board and is 18 mm products, fireproof gypsum board and 18, 21, and 25 mm thick products.
(a) installation is convenient, save area
Gypsum board machinability is good, can be saw, plane, drill, applicable, convenient construction. Made in plasterboard partition can also facilitate indoor pipeline installation and maintenance. USES of plasterboard as wall materials to save the wall area. Increase the architectural space utilization. With 120 mm thick in the partition wall to pour, equivalent to a 17.5% increase in the architectural space.
(2) good fireproof performance
Gypsum board of core material composed of building gypsum hydration, so gypsum plaster is a CaSO4 • 2 h2o crystalline form. In the event of fire, the dihydrate gypsum plasterboard dehydration reactions will absorb heat. When gypsum core material containing water of crystallization is not completely before the emergence and evaporation, gypsum board surface temperature not over 140 ℃, a good fire characteristic can win precious time for population evacuation, but also prolong the fire time. Compared with other materials, gypsum board in the event of a fire only release water and translated into water vapor, will not release harmful to human body composition, and some of the material, in case of fire tend to emit harmful ingredients to human body, such as poisonous smoke.
(3) the heat insulation performance
The coefficient of thermal conductivity of gypsum board only about 9.5% of Portland cement concrete, which is 38.5% of hollow clay brick. If adding foaming agent in the production process, will further reduce the density of gypsum board, its coefficient of thermal conductivity will become smaller, the thermal insulation performance will be better.
(4) expansion shrinkage performance
Plasterboard of linear expansion coefficient is small, with plasterboard and use at room temperature, so its linear expansion coefficient can be neglected. Plasterboard of face but the drying shrinkage is wet bilge phenomenon is relatively large. Placed plasterboard of wet saturated steam at 100 ℃ in 1 h, its length expansion rate of 0.09%. Of course, plasterboard is rarely used in the environmental conditions.
(5) special "breathing" function
Here "breathing" function of gypsum board, not means it need the air to breathe to live like animals, but it ACTS as a hygroscopic XieChao image description. Because there are a large number of microporous gypsum board is a kind of structure of the plate, on the natural environment, because of its porous hygroscopic and XieChao change, namely "breathing", maintain the dynamic balance. Its quality changes with the change of environmental temperature and humidity, the biggest characteristic of this kind of "breathing" function, is able to adjust the humidity of living and working environment, create a comfortable microclimate.