Foamed cement board is a non combustible material, non-toxic, environmentally friendly and low-carbon, which is strongly advocated by the statenew materials And its fire resistance reachesGrade A[1]。This product has high compressive strength (compared withPlastic foamRatio), thermal conductivity coefficient 0.045, firm bonding with concrete, consistent expansion coefficient, and consistent service life with buildings.
Chinese name
Foam cement board
Type
Non combustible materials, non-toxic, environmentally friendly new materials
Application
Roof insulation board, internal and external wall insulation board
This product is mainly used for roof insulation boardExterior wall insulation board, directly used for bonding mortarcement mortarBonding, as the coating surface of external wall insulation board, can be directly waterproofAnti crack mortarandGlass fiber gridding clothIt can be used as a protective layer.When pasting ceramic tiles, steel wire grids can be hung and plastic anchor bolts can be made, and anti crack mortar can be plastered outside to paste ceramic tiles.
Thermal insulation effect
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Foam cement board is used as roofinsulation material The adhesion performance between the insulation layer and the floor base is greatly improved.In the past, most of the floor heating construction used benzene board as the thermal insulation layer, which could not be well combined with the original base surface, and there was no effective adhesion, resulting in delamination, hollowing, cracking, etc.
The foamed cement board is used as the thermal insulation layer, so that the foamed cement insulation layer can be filled with the small uneven base surface of the original floor, and can be firmly grasped to form a strong adhesion performance.After construction, the original surface course will basically reach the level, which will bring convenience to the next process and ensure the overall effect of even thickness of the surface course.
In addition, the thermal insulation layer made of benzene plate has been used for 1~2 years. Due to long-term trampling, it gradually sinks under load, and there are cracks up to 5~10mm. In serious cases, it will damage the heat supply pipe and cause water leakage.Using foamed cement as the thermal insulation layer will not produce this phenomenon at all. Because the compressive strength of foamed cement is higher than that of benzene board, the advantages are very obvious.
At the same time, people from all walks of life pay more and more attention to environmental protection and hygiene, and use benzene plate as the thermal insulation layer. When heating, polystyrene (benzene plate) will release residual benzene and alkenes with the rise of temperature. Especially in winter, when heating, doors and windows are tightly closed, air mobility is poor, and toxic gases cannot be replaced, which is bound to cause certain harm to human health.The roof insulation made of foaming cement is not the same. The raw material of cement foaming agent is vegetable fatty acid, and the synthesis is water soluble. It is a safe, environmental and health product, and will not cause harm to human body.
Application of foam cement insulation layer in floor heating
Foam cement insulation layer is added in a certain proportion of cement pasteCement foaming agentAfter mixing and foaming, it is poured on the floor to form a structural layer with specified density, strength and thermal conductivity.As stated in Technical Code for Ground Radiant Heating (JGJ142-2004)Polystyrene foamThe functions of the boards are the same. This technology is widely used in South Korea, Japan, Europe and other places. Foam cement has the following characteristics instead of benzene board:
(1) Before drying, it has strong dispersivity and safe fluidity, which is easy to be closely combined with the upper filling layer, avoiding the hollowness formed by benzene plate insulation.
(2) It has good strength.In addition to the functions of heat preservation and sound insulation, foamed cement also has supportFloor heating pipeBecause of its high strength and no deformation, it can avoid ground cracks caused by the use of benzene plates.
(3) Sound insulation effect is good.A large number of porous independent pores formed by foamed cement can absorb sound well.
(4) Light weight.The weight of foamed cement per cubic meter is about 400-500kg.
(5) The construction speed is fast.Before construction, building floors need not be leveled and can be directly constructed.It can realize one-time integral casting and molding, and overcome the shortcomings of traditional operations, such as many processes, long construction period, high repair rate, etc.
(6) The process of aluminum foil layer, steel wire mesh and benzene plate in construction is omitted, and the process of leveling layer is reduced, thus reducing the cost.
Production raw materials
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The main material of foamed cement board is cement, which is mixed with hydrogen peroxide, hard calcium, fly ash and cement foaming agent, and is formed by foaming.Foamed cement insulation board The thermal insulation effect is very ordinary. The popular products on the market are phenolic board andFoam glass。Foam cement insulation board is used for wall insulation and wall insulationFire barrierIdealThermal insulation materialIts advantages are: low thermal conductivity, good thermal insulation effect, non combustion, waterproof, strong adhesion with the wall, high strength, non-toxic radioactive substances, and environmental protection.
Cement, powder hydraulicInorganic cementitious material。It can harden in air or better in water, and can firmly cement sand, stone and other materials together.The word cement is developed from the Latin caementum, which means gravel and rubble.
Hydrogen peroxide solutionThe chemical formula is H2O2. Its aqueous solution is commonly known as hydrogen peroxide. Its appearance is colorless transparent liquid. It is a strong oxidant and is suitable for wound disinfection, environment and food disinfection.
Hard calcium reacts with phenol and caustic potash to form salt, and thencarbon dioxideCarboxylation reaction, acid precipitation.White crystalline powder, easily soluble in alcohol, ether and acetone.It can be used for organic synthesis, synthetic pesticides, dyes, medicine, anti-corrosion and other purposes.
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.
