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    Home > Coatings News > Paints and Coatings Market > Common knowledge of coating: the relationship between energy saving and fire protection of building exterior wall insulation materials

    Common knowledge of coating: the relationship between energy saving and fire protection of building exterior wall insulation materials

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tips: at present, the thermal insulation materials used for external wall insulation are mainly EPS (polystyrene foam), XPS (extruded polystyrene foam), PU (polyurethane foam), rock (ore) cotton sheet, glass wool felt and ultra light polystyrene particle insulation slurry and other materials These materials generally have the disadvantages of energy saving and fire prevention Organic materials are not only heat-resistant and easy to burn, but also release a lot of heat and produce a lot of toxic fumes when burning, which will not only accelerate the spread of fire, but also easily cause casualties of trapped people and rescue personnel; inorganic materials have dust and small fibers, which not only pollute the air but also easily cause bacteria Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Coatings home news: at present, the thermal insulation materials used for external wall thermal insulation are mainly EPS (polystyrene foam), XPS (extruded polystyrene foam), PU (polyurethane foam), rock (ore) cotton sheet, glass cotton felt and ultra light polystyrene particle insulation slurry and other materials These materials generally have the disadvantages of energy saving and fire prevention Organic materials are not only heat-resistant and easy to burn, but also release a lot of heat and produce a lot of toxic fumes when burning, which will not only accelerate the spread of fire, but also easily cause casualties of trapped people and rescue workers; inorganic materials have dust and small fibers, which not only pollute the air but also easily cause bacteria, which has become a hidden danger to people's health, and heat preservation and insulation Limited performance and limited application Building energy conservation is the main content of the national environmental protection and energy conservation policy, and is an important part of the implementation of the national economic sustainable development strategy With the increase of energy-saving standard from 30% to 50%, the external wall insulation technology has made great progress and become an important building energy-saving technology in China However, in recent years, the external wall insulation materials fire frequently, causing significant casualties and property losses Therefore, with the overall promotion of building energy conservation, the fire protection problem of building energy conservation is becoming more and more serious In article 5.1.1 of code for fire protection design of buildings (GB50016-2006), it is pointed out that the fire resistance limit of non load bearing exterior wall plays a certain role in the spread of fire between buildings, but it is not the main one It can be seen that the fire prevention of building exterior wall is mainly to prevent the spread of fire The focus of building fire prevention is to solve the problems of fire resistance rating, fire separation, fire compartment, safe evacuation, fire water supply, fire fighting, smoke control and smoke exhaust Generally speaking, the probability of fire on the whole exterior wall surface is very low First of all, it is necessary to find out where the fire source that can burn the exterior wall surface is (unless there is a fire at the construction site) There are special provisions in the specifications The fire spread of the exterior wall is mainly to prevent the fire source caused locally from spreading outwards The main fire source occurs in the interior of the building For the exterior wall, it is mainly the indoor flame that spreads upward through the opening part of the exterior wall door and window opening to the upper opening and enters the room, causing the upper fire Therefore, the sill wall between the upper and lower window openings (including the gap between the two floors of the curtain wall) should be very careful and must be handled well, which is the key point of prevention Second, for the fire protection design of buildings, one of the main purposes is to facilitate the safe and smooth transfer of personnel and facilitate fire fighting The key point of external wall fire prevention is that the window fire spreads upward, which enables the residents to transfer within a certain period of time Therefore, a time should be set so that measures can be taken in the architectural design to meet the fire protection requirements Of course, it does not exclude the plugging of other external wall openings, but it can not prevent the spread of local fire sources on the external wall and put forward the "fire protection problem of external wall insulation", so as to improve the fire protection requirements of the entire external wall insulation Therefore, through the investigation, we think that the fire prevention measures to strengthen the external wall insulation should be divided into three aspects: to prevent the fire spreading in the opening part of the external wall According to section 9.4 of code for housing construction (GB50368-2005), the window sill wall with height of not less than 0.8m or the non combustible solid cornice with fire resistance limit of not less than 1.00h shall be set, and its overhang width shall not be less than 0.5m and its length shall not be less than the opening width In the code for fire protection design of garage, garage and parking lot (GB50067-97), which has strict fire protection requirements, it is pointed out that the main problem of external wall fire protection is to prevent or delay the fire spreading from inside to outside through the external window sill It is similar to the residential building that "the fireproof cornice of incombustible body shall be set above the door and window of the external wall, the height of the wall between the upper and lower windows of the external wall shall not be less than 1.2m, the fireproof cornice shall not be less than 1m, and the fire resistance limit shall not be less than 1.0h" In conclusion, two measures should be taken for the fire prevention of the window sill wall of the external wall: one is to regulate the height of the window sill wall, the other is to set the cornice Of course, there are other measures In the code for fire protection design of buildings, it is stipulated that the fire resistance limit of non bearing walls is not high, even for the non bearing walls with four fire resistance grades, combustion materials are allowed to be used, and the external walls with other grades are 1.00h-0.50h, for example, some parts of the walls are pasted with combustible materials, so certain structural measures should be taken to prevent the fire spreading In article 2.0.3 of code for fire protection design of buildings (gb500 0, 6-2006) and article 2.0.4 of code for fire protection design of high rise civil buildings (GB50045-95), it is stated that "refractory materials" refer to building components made of combustion materials or building components made of combustible materials and protected by non combustible materials In other words, after the combustion material and the flame-retardant material are combined, the part can be regarded as the flame-retardant material (of course, the comprehensive fire performance of the external wall should also meet the requirements of the specification) Therefore, the reasonable height of the window sill wall and the cornice set as mentioned above or the flame-retardant or non combustible thermal insulation material (including composite material) or the thermal insulation "lintel" with the flame-retardant or non combustible material are the outside of the building Key points of wall fire protection The main structure and practice of external wall insulation mainly includes internal insulation and external insulation It is difficult to deal with the heat bridge insulation in the internal insulation, which is prone to condensation, occupying the use area and affecting the secondary decoration of residents And the hanging and fixing objects of the inner wall are also easy to damage the inner insulation structure, while the outer insulation of the outer wall is to fix a layer of insulation material under the effect of bonding material on the outer side of the main wall structure, and to strengthen and brush the bonding glue on the outer side of the insulation material with fiberglass mesh The existing energy-saving projects in our district are basically external wall insulation It mainly uses adhesive mortar or special fixings to paste and hang the thermal insulation materials on the external wall, then plaster the anti crack mortar, press into the glass fiber mesh to form the protective layer, and finally add the decorative surface Another method is to fix various heat preservation boards that are not easy to absorb water on the external wall with special fixings, and then hang the aluminum board, natural stone, colored glass and other materials on the prefabricated keel to directly form the decorative surface Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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