With the continuous development of industrial technology, high temperature resistant and heat insulating coatings came into being. High-temperature-resistant and heat-insulating coatings are the research results of Zhisheng Hua Wei for many years, with the world-leading coating research and development technology. After more than ten years of research and application, the coating technology has been greatly improved. ZS- 1 Heat-resistant and heat-insulating coatings are a series of aerospace energy-saving and heat-insulating coatings. Aerospace energy-saving thermal insulation coatings include ZS high temperature type and ZS normal temperature type. ZS- 1 heat-resistant insulating coatings can be divided into three types according to different service conditions: 600℃, 1000℃ and 2000℃.
Using the latest technology, ZS- 1 high temperature resistant heat insulation coating can withstand 2000℃. The coating is made of synthetic silicate solution specially made by Zhisheng Hua Wei, aluminum silicate fiber, heat reflecting substance and selected α-phase hollow ceramic microbeads. The coating is an inorganic one-component, without any peculiar smell and harmful substances at high temperature and room temperature. The main function of the coating is to prevent heat conduction, and the thermal conductivity is only 0.03 W/m.k The coating can effectively inhibit and shield radiation heat and conduction heat, and the heat insulation inhibition efficiency can reach about 90%, which can inhibit the radiation and heat loss of high-temperature objects, effectively keep cold for low-temperature objects, inhibit the cold loss caused by environmental radiation heat, and prevent the generation of condensed water.
In the decades since the research and development of ZS- 1 high-temperature-resistant and heat-insulating coatings, Beijing Zhisheng Hua Wei Chemical Co., Ltd. has recently launched the second generation ZS- 1 high-temperature-resistant and heat-insulating coatings through the continuous technological innovation of dozens of technical research and development personnel, tens of thousands of laboratory tests and continuous feedback of customer application results. On the basis of the original coatings, the coating has undergone three improvements, and its heat-insulating performance has been greatly improved:
Before painting ZS 1 high temperature thermal insulation coating, it is necessary to ensure that the surface of the painted substrate is free of dust, oil, debris, floating layer, rust, moisture and other foreign matters that may affect adhesion. Correct pretreatment of substrate surface, such as rust removal of steel and metal surface,
Remove oil, dust and foreign matter, and remove foreign matter and floating ash on other substrates. The above substrates shall be cleaned with clear water, and then painted after the water is dried.
What are the roof insulation methods?
1, air circulation heat insulation method. It is to cover the roof with a hollow interlayer of about 30 cm, because there is flowing air below, which can effectively isolate the heat transfer effect when the sun is exposed in summer.
2. Water insulation method. This method requires high quality of the roof. Nowadays, many houses are insulated in this way, and the roof is generally a shallow water pit, about 15 cm deep. This method of roof insulation can effectively and reasonably reduce the indoor temperature, and it is relatively simple.
3. White paper reflection method. As the name implies, it is to spread a layer of white paper with smooth surface on the roof. This material is tin foil, which is not easy to get greasy, has strong reflection and heat insulation.
4. At present, there are many methods for roof insulation. You can lay 10 cm thick pearl sand insulation layer on the roof, and then make a layer of cement prefabricated insulation board. If it is a cast-in-place reinforced concrete roof, a soil layer with a thickness of 20 cm can be stored on it for greening and planting flowers and plants, which not only beautifies the harsh environment, but also has the function of thermal insulation.
5. Roof heat insulation method The invention discloses a roof leak-proof heat insulation method, which covers the whole roof with glass steel plates and bonds the glass steel plates into a whole.
Compared with the prior art, it has the advantages of easy construction, high material strength, light self-weight, long service life, good leak-proof and heat insulation effect, etc.
6. If the top users adopt the method of laying ceramsite concrete for thermal insulation, the indoor temperature can be greatly reduced, which can not only lead a comfortable summer, but also effectively save electricity and reduce the expenditure of electricity. As a roof insulation layer, ceramsite concrete has good moisture-proof and waterproof effects, and is effective in thermal insulation. Now ceramsite concrete has been widely used as toilet backfill and roof insulation layer.
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Roof insulation materials are often used in roof insulation, but many people don't know what roof insulation materials are. There are many kinds of roof insulation materials in the market, which can be generally divided into inorganic materials and organic materials: inorganic materials include expanded perlite, aerated concrete, rock wool, glass wool and so on. Organic materials include polystyrene foam and polyurethane foam. The following small series will tell you in detail what the roof insulation materials are.
First, common roof insulation materials
1, the thermal conductivity of expanded polystyrene board (EPS board) is 0.038-0.04 1, which has good thermal insulation effect, low price and slightly poor strength.
2. The thermal conductivity of extruded polystyrene board (XPS board) is 0.028-0.03, which has good thermal insulation effect, high strength and high humidity resistance, and the surface needs to be treated during construction.
3. The thermal conductivity of rock wool board is 0.04 1-0.045, which has poor fire resistance, flame retardancy, moisture absorption and thermal insulation.
4. The thermal conductivity of rubber powder polystyrene particle thermal insulation slurry is 0.057-0.06, which has good flame retardancy, unsatisfactory thermal insulation effect of waste recycling and high construction requirements.
5. The thermal conductivity of polyurethane foam is 0.025-0.028, which has good waterproof performance, good thermal insulation effect, high strength and high price.
6. The slurry such as perlite has a thermal conductivity of 0.07-0.09, good fire resistance, poor heat insulation effect at high temperature and high water absorption.
Second, the plate insulation roof insulation materials
Board insulation roofing insulation materials have a wide range of applications, which can be used for both external wall insulation projects and internal wall insulation projects. The insulation body of the board insulation material can be different materials such as expanded polystyrene board, extruded polystyrene board, rock wool board, glass wool board, etc. Board insulation materials can be divided into single insulation materials and system insulation materials, and the following problems should be paid attention to in the application process:
(1) Single-layer thermal insulation material:
It is the main body of thermal insulation engineering application, and it needs the cooperation of other materials in the process of use. Such as: foamed polystyrene board, extruded polystyrene board, rock wool board, glass wool board, etc. , the following test contents should be tested before use:
1, thermal conductivity (W/m? K): This technical index is the key index related to the thermal insulation effect of the project. Generally speaking, the laboratory test is carried out when the plate is dried to a constant weight, and the application of the material is used under the condition that the air contains a certain humidity, so it should be multiplied by a certain coefficient; Or, directly adjust the material to the use environment for testing.
2. Apparent density (Kg/m3): The apparent density of a material affects its thermal conductivity to a certain extent. Unqualified apparent density will directly lead to the decline of its physical properties, such as strength and dimensional stability.
3. Compressive strength (MPa): refers to the compressive stress of the sample under 10% deformation. It is related to the durability and impact resistance of the surface system.
4. Size change rate (mm): The material with large size change rate will cause the surface layer of the system to crack.
5, water vapor permeability coefficient [ng/ (Pa? m？ S)]: This property determines the permeability to water vapor, and also determines whether the wall is dewy to some extent.
6. Oxygen index: flame retardant type is required, otherwise the fire protection cannot meet the standard.
(2) System insulation materials
1: external wall thermal insulation system: foamed polystyrene board (or extruded polystyrene board)+alkali-resistant glass fiber grid cloth+polymer mortar containing glue, such as Tewitt external wall thermal insulation system, Beijing Zhong Jian Institute external wall thermal insulation system, Prewitt thermal insulation system, etc.
A: heat transfer coefficient: the thermal insulation effect of the system thermal insulation material combined with the main structure is affected by
The construction quality and environmental temperature and humidity have changed, so it is necessary to test on the spot to master its actual effect. According to the Code for Thermal Design of Civil Building Energy Conservation (JGJ) issued by the Ministry of Construction
26-95 and the "Detailed Rules" of all localities as indicators, which shall not be lower than its limit;
B: Waterproof, freeze-thaw, weather resistance, impact resistance and wind pressure resistance: as the external insulation of the external wall, its facing must be able to resist the attack of unfavorable factors such as rain, freeze-thaw, impact and strong wind, so the above functions should be tested before use. The tensile strength of alkali-resistant glass fiber grid cloth matched with external thermal insulation system of external wall should be greater than 200N/cm, and the residual tensile strength after alkali resistance should be not less than150 N/cm; The 7-day tensile bond strength of the adhesive should be greater than 1.
The tensile bond strength after Mpa, water resistance and freeze-thaw resistance should be greater than 0.9Mpa.
2. Internal thermal insulation system: foamed polystyrene board (or extruded polystyrene board)+gypsum board; GRC insulation board (sintered polystyrene board and cement mortar composite); Rock wool sandwich insulation board; Reinforced cement polystyrene insulation board, etc.
Three, mortar insulation roof insulation materials
At present, the thermal insulation material of mortar thermal insulation roof is mainly used for the internal thermal insulation of external walls, and can also be used for the thermal insulation of partition walls and household walls, and can also be used for the external thermal insulation of external walls when the performance allows. There are two kinds of slurry, one is the solidified type based on cementitious materials, and the other is the dry type based on water evaporation. Its main component is a light thermal insulation material composed of sepiolite (polystyrene particles), mineral fiber and silicate, which is compounded by a certain production process. Its products are powder and paste (paste), but they are all applied to the foundation when used. Pay attention to the following test data when using:
1, used for internal insulation and partition wall: thermal conductivity, apparent density, volume shrinkage, bonding strength, softening coefficient, asbestos content, water vapor permeability coefficient, water absorption, oxygen index, etc.
2. Thermal conductivity, apparent density, volume shrinkage, bonding strength, hydrophobicity, asbestos content, softening coefficient, water absorption, fire resistance, etc. The thermal insulation of materials should be considered, and the thermal insulation of the system should also be tested.