The performance advantage of the foamed cement insulation board is introduced in the front. Everyone is very interested in the raw materials and production technology of the foamed cement insulation board. Today, we will share the raw materials and technology of foaming cement insulation board for your reference.
Foaming cement insulation board production raw materials
The main material is cement, hydrogen peroxide, hard calcium, fly ash, aerogel and cement foaming agent fusion foam. Foamed cement insulation board is the current wall insulation and wall insulation fire insulation belt the most ideal insulation material, its advantages are: low thermal conductivity, good insulation effect, no combustion, waterproof, and wall adhesion, high strength, non-toxic radioactive substances, environmental protection.
1, cement, powder hydraulic inorganic cementing material. Add water to mix into slurry, hardening in the air or in the water better hardening, and can sand, stone and other materials firmly cemented together. Hence the word cement developed from the Latin word caementum which means gravel and stone.
2, hydrogen peroxide solution, chemical formula for H2O2, its aqueous solution commonly known as hydrogen peroxide, the appearance of colorless transparent liquid, is a strong oxidant, suitable for wound disinfection and environmental, food disinfection. Industrial hydrogen peroxide is 27.5 percent. At present chemical foaming mostly USES hydrogen peroxide as foaming agent
3. Calcium stearate is mainly calcium stearate. Phenol was reacted with caustic potash to form salt, then carboxylated with carbon dioxide to produce acid. White crystalline powder, soluble in alcohol, ether and acetone. Can be used for organic synthesis, synthetic pesticides, dyes, medicine, antiseptic and other purposes.
4. Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. The main oxides of fly ash from thermal power plants in China are: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, etc. ,
5 Aerogel is a new solid material with nano-porous structure. It has such excellent properties as ultra-light weight, heat insulation, transparency, heat preservation and fire prevention. When aerogels are added to foamed concrete, the calorific conductivity of concrete will gradually decrease with the addition of aerogels. However, since the main component of aerogels is silica, under alkaline conditions, high-strength silicate components will be generated, which will not only reduce the thermal conductivity, but also increase the strength and toughness.
6, cement foaming agent
Cement foaming agent is an admixture that can reduce the surface tension of liquid and produce a large amount of even and stable foam to produce foamed concrete. Foaming agent is able to make its aqueous solution in the case of mechanical force into the air, a large number of foam material, this kind of material is the surfactant or surfactant. This is a physical foaming agent. Also can choose chemical foaming agent of course.
Production technology of foamed cement insulation board
1. Feeding and mixing: quantitative cement, foaming agent and stable foam enhancer are added into the mixer through the feeding system, and the mixture is dried for 30 seconds;
2. Stirring: add a certain amount of warm water into the blender and stir it wet for 2 minutes; Add the quantitative foaming agent to the blender and stir for 8-15 seconds.
3. Mold injection and foaming: the slurry is then injected into the mold for foaming, and the foaming process takes about 3-5 minutes;
4. Initial maintenance: the injection mold is left for several hours for initial maintenance;
5, demoulding: foam cement insulation board to complete the initial condensation, with the initial strength of demoulding can be;
6, cutting: with a certain strength of foaming cement insulation board blank stripping can be cut, cutting specifications according to the need to adjust the cutting blade;
7. Maintenance of finished products: the curing period of foamed cement insulation board shall not be less than 7 days.
Of course, foaming cement insulation board in the actual production of added materials and construction methods will be slightly different, according to the need to produce the insulation board to achieve the strength and insulation coefficient and so on. Specific problem specific analysis