Q:What is dew point of thermal insulation material?

Insulation materials, insulation for industrial equipment and piping, thermal insulation measures and material aerogels were first applied to the space suit thermal insulation linings developed by nasa. With low thermal conductivity, small density, high flexibility, fire, waterproof and other characteristics. Its temperature coefficient of thermal conductivity 0.018W/ (K = m) and absolute waterproof, insulation performance is 3~8 times of traditional materials.

Q:What is the main role of fly ash added in concrete products?

Fly ash can inhibit the bleeding of fresh concreteFly ash can fine crumbs compensation in fine aggregate shortage, interrupt continuous bleeding mortar channels, and fly ash as cement replacement materials in the same consistency will make use of concrete water quantity is reduced in different degree, thus adding fly ash is beneficial to prevent the fresh concrete the bleeding.

Q:What's the difference between white cement and ordinary cement?

The main chemical composition of Portland cement clinker is calcium oxide, silica, alumina and iron oxide. Calcium oxide mainly derived from calcareous raw materials, such as limestone, chalk, marl; alumina and silica from aluminum silicate containing substances, such as clay, blast furnace slag and fly ash; iron oxide is used in sulfuric acid production of sulfur iron slag. For the content of calcium oxide production of Portland cement lime materials in 52%; silicon oxide content of clay in raw materials up to about 57%, the alumina content is less than 20%. In order to reduce the calcination temperature and to produce part of the melt during calcination, a small amount of iron oxide is often added. Of raw materials but also control the content of alkali and Magnesium Oxide, Magnesium Oxide is content in the cement clinker should be less than 5%, total alkalinity (Na2O+K2O) for general cement should be less than 1.2% of low alkali cement should be less than 0.6%.

Q:The ceiling of calcium silicate board and mineral wool board which is good

Calcium silicate board with fire prevention, moistureproof, sound insulation, thermal insulation, indoor air in wet conditions can attract water molecules in air, air drying, and the release of water molecules, can adjust the indoor humidity, dry, increase comfort.Natural gypsum products and special fireproof material, the flame can produce endothermic reaction, at the same time, the release of water molecules to prevent the fire from spreading, and does not produce any toxic decomposition, corrosive and choking gas, will not produce any smoke or combustibles.Mineral wool board is mineral fiber cotton as raw material, the biggest characteristic is to have good sound absorption and heat insulation effect.

Q:How to make building glue?

An adhesive and a preparation method thereof, according to the proportion of the polyether and polyester resin, and multiple natural plant resin, polystyrene resin, solvent oil and ultraviolet resistant, anti-aging agent in the container, evenly stirring at 20 DEG -30 DEG C into TDI, heating up to 70 DEG -100 DEG 2-5 hours of stirring that uniform to room temperature, adding industrial gasoline diluted into oil, the transparent liquid is liquid, of course, according to the need of color, can also add to the metal paste color. The main feature of the invention is to glue sealing watering Ni bare surface, to set free, waterproof, anti cracking and water conservation effect, while the antirust effect is far more than the anti rust paint several times.

Q:What are the high temperature resistant insulation materials at 400?

According to the general rules of equipment and piping insulation, heat insulation material is a material with a thermal conductivity of less than 0.14W/ (m*K) when the average temperature is equal to or less than 623K (350 degrees Celsius). Heat insulation material is usually light, porous, porous, small thermal conductivity characteristics. Generally used to prevent heat loss of equipment and pipes, or frozen (also known as general cold) and low temperature (also known as cryogenic) use, so in our country, insulation materials, also known as insulation or cold preservation materials. At the same time, because of the porous and fibrous structure of thermal insulation material, it has good sound absorption function, so it is also widely used in the construction industry.

Q:What's the use of white portland cement?

White portland cement as the raw meal with the proper components till the partial melting of the calcium silicate as the main ingredient, the iron content in clinker less addition of gypsum, white water ground made of rigid cementitious material. When grinding cement, allow limestone not to exceed 5% of the cement weight. White cement is mostly ornamental, and its manufacturing process is much better than ordinary cement. The gap is mainly used to hook white tiles, is generally not used in the wall, the reason is not high strength. It is available in the building materials market or decoration materials shop.

Q:What's the use of low carbon steel insulated nail hooks for power plants?

Mild steel is a type of carbon steel, and its carbon content is between 0.1% and 0.3%. The so-called carbon steel is also called carbon steel, refers to the carbon content of less than 2.11% of the iron carbon alloy. As we all know, the carbon content of the impact on the iron and carbon alloy is very large, the higher the content, the greater the hardness, but the smaller the toughness, and therefore easy to damage. Low carbon steel, because of its low carbon content, therefore, good toughness, low hardness, easy to carry out a variety of processing, such as welding, forging, etc.. And after some heat treatment, low carbon steel can obtain various properties, such as wear resistance, corrosion resistance and so on.

Q:What are the raw materials of cement products? What's the function?

Sand。 Gravel occupies a very large volume in concrete production, reaching 70%~80%. The aggregate surface, structure, adsorption and water content of aggregate should be required. The appropriate amount of sand and gravel can save cement, reduce the cost of concrete production, and improve the strength of concrete.

Q:What are the new energy-saving building materials? What's new?

As far as its varieties are concerned, the new wall materials mainly include bricks, blocks and slabs, such as clay hollow bricks, waste clay bricks, non clay bricks, building blocks, aerated concrete, light plates and composite boards.