HONGKONG GREAT WALL CO.,LTD
更新時(shí)間：2016-08-16 瀏覽次數(shù)：609
Technical properties, magnesia cementitious material
(a), setting time
In accordance with the provisions of the ground and floor engineering and acceptance specification) (GBJ209) and magnesia by density was 1.2g per cubic centimeter of magnesium chloride solution modulation into standard consistency pastes. At the beginning of setting time not dry in 20min. Final setting time shall not be later than 6h.
(two) high strength
Magnesia cementitious material is prepared with magnesium chloride solution and magnesite products. Compressive strength up to 40~60MPa, among them 1 day intensity can reach the highest intensity 6 return to 8 balcony, about 7 days can reach the highest intensity. And the apparent density is small (1000^1100kg/m) after hardening. Lightweight, early strength, high strength cementitious materials.
(three) good performance of dry knot
Bonding performance of magnesia and various fiber materials is very good, and the basic ratio of cement and weak. No corrosion of fiber materials. Therefore, the use of wood chips, glass fiber, such as the production of composite plate, floor, etc. in order to improve the tensile, flexural and impact properties of products.
(four) water resistance is poor.
Magnesia cementitious material products or in the humid environment easily deformation by water absorption. Strength decreased. And product surface appear pan cream (commonly known as halogenation). The influence of normal use. Therefore, it can only be used in dry environment.
The curing agent of Magnesium Sulfate and ferrous sulfate in the product can improve the water resistance, but the strength is relatively low. The best way to improve the water resistance is to mix the phosphate or water proofing agent (high cost), and can also be mixed with other active materials such as slag, fly ash and so on.
In addition. Because of the chloride ion content in the product is high. So the effect of corrosion of steel nails, is very strong. We should try to avoid using nails fixed with steel plate or other easy to direct contact with the stainless material.
Two, the application of magnesium oxychloride cement
Magnesite wood floor: magnesia powder, sawdust, calcium chloride and other mixed material (talcum powder, sand, stone chips, fly ash, pigment and so on) etc. production floor. With certain elasticity. And prevention of fire, explosion, thermal conductivity is small, smooth surface, not grey. Mainly used for indoor floor.
Sheet: usually adds the shavings, wood fiber, glass fiber, poly cool fiber etc.. All kinds of sheet l production, such as decorative board, fire board, partition board, and other. Can also be used to make ventilation pipe
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