Under the government's advocacy of building a conservation-minded society, after the State Council issued a notice of a comprehensive work plan for energy-saving and emission reduction in 2006, building energy conservation has gradually spread throughout the country and has continued to reach a climax, with construction offices and construction committees across the country The introduction of the policy stipulates that new buildings must be insulated by walls, and some provinces even require real estate projects to meet insulation requirements before acceptance. Energy-saving buildings seem to be getting closer and closer to us. Energy conservation is also a waste of current external wall insulation materials. Its obvious hazard is that it cannot achieve the effect of heat preservation and is not conducive to the development of the industry, wasting capital and resources. However, the biggest hazard is its hidden danger, that is, the hidden danger of environmental protection. As far as the current external wall insulation material market is concerned, more than half of them will fail to achieve the insulation effect, and even within 3 to 5 years, cracking and shedding will occur, not to mention the 25-year life expectancy.
It can be asserted that more than 50% of them do not even have a 10 year life expectancy. What is awful is that the amount of construction waste generated in 10 years will be measured in tens of billions of tons. How much of it is polyphenylenes that pollute the environment? How will we deal with these construction wastes in the future? According to experts, the insulation and fire protection performance of the exterior wall thermal insulation materials can coexist. In order to improve the fireproof performance while maintaining good heat preservation and energy saving, flame retardants and other materials must be added, but the cost is also high. Ordinary materials are two to three hundred yuan per cubic meter, and the price of good materials may become a thousand dollars. According to the current national conditions and economic development level, general construction developers may not be able to afford such high costs. Because there are no clear regulations and economic costs, many buildings use relatively cheap materials. In the event of a fire, ordinary materials are more flammable and cause greater losses.
The country does not have uniform standards for implementation and acceptance, and each locality has its own administration. Experts said that “the current market is dominated by the external wall insulation material technology. Due to the large occupied building area and the poor results, it has basically been eliminated, and the technology has EPS board thin plastering system, rubber powder polystyrene heat insulation slurry system, EPS board cast System, EPS steel mesh frame cast-in-place concrete system, insulation board and decoration integrated molding installation system, polyurethane field spraying compound polystyrene particle leveling system, masonry structure sandwich insulation wall system and other technical systems. Each of these systems has its own advantages and disadvantages, and it is difficult for the experts or the competent government departments at all levels to reach a consensus or form a unified standard.Therefore, it is inevitable that some companies will not be confused and only consider their own interests without regard to energy efficiency. .
In fact, this situation is not conducive to the healthy development of the entire market. At present, there are about 3,000 or so large and small manufacturers in the market. The competition is fierce and the market is extremely irregular. In terms of thermal insulation mortar, there are more than 8,000 yuan a ton, there are 500 yuan a ton, 500 yuan a ton of fear is all the sand, and can only achieve the insulation effect only know! At present, many countries in the United Kingdom, the United States, and other countries have enacted laws and regulations to prohibit the use of benzene boards with poor fireproof capacity in high-rise buildings. China currently uses organic combustible materials (EPS, XPS, PU, ​​etc.) in a large number of external wall insulation materials, and it is extremely lacking in quality clearance. Non-combustible materials such as mineral (rock) wool board.
However, due to the special conditions of the country, it can not be easily graded and standardized according to European and American standards. At present, most buildings in China are in the middle and high levels. If they are completely implemented in accordance with European and American standards and regulations, the organic insulation material system is limited to 22 meters or less, it will cause a serious surplus of organic external wall thermal insulation materials without burning external wall insulation materials supply will be serious Affect the promotion of domestic building energy-saving measures. Experts believe that in light of China's specific conditions, China should also establish strict fire prevention laws and regulations and effectively supervise them, and use administrative means to arouse the public’s awareness of the quality of external wall thermal insulation materials and prevent the occurrence of fire upgrades caused by construction materials. . From this we can see that the introduction of regulations and regulations for external wall thermal insulation materials is imminent.
The outer wall is greatly affected by the outdoor climate. The temperature difference between day and night and the large temperature difference between winter and summer can easily cause wall cracking and rainwater leakage. Experts pointed out that the Ministry of Construction is currently implementing a 50% standard for mandatory energy saving for newly-built buildings, and as the best material for thermal insulation performance at present, polyurethane hard foam is an internationally used building insulation material. The market for polyurethane building insulation materials with flame-retardant grades that meet the standard has great potential. The state should issue relevant policies and regulations, regulate the use of buildings, allow people to eat “centering pills,†and use polyurethane insulation materials with high flame retardancy and good insulation properties. Can be more widely used in the construction market The government has its own testing standards and uses it as a source of income. It has invested in insulation materials for external walls since last year. Currently, it has entered 14 cities, but it has entered the 14 cities for testing and certification. The cost will cost 1 million yuan, a system, each entering a market, the need for testing admission fees ranging from 20,000 yuan to 80,000 yuan.
The manufacturers of exterior wall thermal insulation materials are even more prosperous, and even many family workshop-type enterprises have joined them. The market has only just warmed up and it has fallen into a dark and unpredictable price war. Large companies cannot survive, and small businesses can The gold rush, leaving behind a lot of architectural hidden dangers. Such as insulation board and decorative integrated molding installation system, in order to achieve good decorative and thermal insulation effect, the cost per square meter should be around 300 yuan, but in the same project tender, some companies have reported a price of 150 yuan, so that the owners No choice. At present, the poor living environment has not made a well-known brand in the external wall insulation material industry.
European and American standards basically provide that non-flammable insulation materials should be used in buildings over 22 meters. It is indeed people-oriented and safety first. However, China lacks such quality materials to pass through, but there are a large number of organic flammable materials. For example, according to European and American standards, incombustible materials are scarce. Excessive production of organic materials is not conducive to energy conservation. The standards of foreign countries were formulated earlier, but in practice they are all seeking "breakthroughs." Although the methods used in the experiments have relatively high requirements for construction management, they are, after all, a solution.
It can be asserted that more than 50% of them do not even have a 10 year life expectancy. What is awful is that the amount of construction waste generated in 10 years will be measured in tens of billions of tons. How much of it is polyphenylenes that pollute the environment? How will we deal with these construction wastes in the future? According to experts, the insulation and fire protection performance of the exterior wall thermal insulation materials can coexist. In order to improve the fireproof performance while maintaining good heat preservation and energy saving, flame retardants and other materials must be added, but the cost is also high. Ordinary materials are two to three hundred yuan per cubic meter, and the price of good materials may become a thousand dollars. According to the current national conditions and economic development level, general construction developers may not be able to afford such high costs. Because there are no clear regulations and economic costs, many buildings use relatively cheap materials. In the event of a fire, ordinary materials are more flammable and cause greater losses.
The country does not have uniform standards for implementation and acceptance, and each locality has its own administration. Experts said that “the current market is dominated by the external wall insulation material technology. Due to the large occupied building area and the poor results, it has basically been eliminated, and the technology has EPS board thin plastering system, rubber powder polystyrene heat insulation slurry system, EPS board cast System, EPS steel mesh frame cast-in-place concrete system, insulation board and decoration integrated molding installation system, polyurethane field spraying compound polystyrene particle leveling system, masonry structure sandwich insulation wall system and other technical systems. Each of these systems has its own advantages and disadvantages, and it is difficult for the experts or the competent government departments at all levels to reach a consensus or form a unified standard.Therefore, it is inevitable that some companies will not be confused and only consider their own interests without regard to energy efficiency. .
In fact, this situation is not conducive to the healthy development of the entire market. At present, there are about 3,000 or so large and small manufacturers in the market. The competition is fierce and the market is extremely irregular. In terms of thermal insulation mortar, there are more than 8,000 yuan a ton, there are 500 yuan a ton, 500 yuan a ton of fear is all the sand, and can only achieve the insulation effect only know! At present, many countries in the United Kingdom, the United States, and other countries have enacted laws and regulations to prohibit the use of benzene boards with poor fireproof capacity in high-rise buildings. China currently uses organic combustible materials (EPS, XPS, PU, ​​etc.) in a large number of external wall insulation materials, and it is extremely lacking in quality clearance. Non-combustible materials such as mineral (rock) wool board.
However, due to the special conditions of the country, it can not be easily graded and standardized according to European and American standards. At present, most buildings in China are in the middle and high levels. If they are completely implemented in accordance with European and American standards and regulations, the organic insulation material system is limited to 22 meters or less, it will cause a serious surplus of organic external wall thermal insulation materials without burning external wall insulation materials supply will be serious Affect the promotion of domestic building energy-saving measures. Experts believe that in light of China's specific conditions, China should also establish strict fire prevention laws and regulations and effectively supervise them, and use administrative means to arouse the public’s awareness of the quality of external wall thermal insulation materials and prevent the occurrence of fire upgrades caused by construction materials. . From this we can see that the introduction of regulations and regulations for external wall thermal insulation materials is imminent.
The outer wall is greatly affected by the outdoor climate. The temperature difference between day and night and the large temperature difference between winter and summer can easily cause wall cracking and rainwater leakage. Experts pointed out that the Ministry of Construction is currently implementing a 50% standard for mandatory energy saving for newly-built buildings, and as the best material for thermal insulation performance at present, polyurethane hard foam is an internationally used building insulation material. The market for polyurethane building insulation materials with flame-retardant grades that meet the standard has great potential. The state should issue relevant policies and regulations, regulate the use of buildings, allow people to eat “centering pills,†and use polyurethane insulation materials with high flame retardancy and good insulation properties. Can be more widely used in the construction market The government has its own testing standards and uses it as a source of income. It has invested in insulation materials for external walls since last year. Currently, it has entered 14 cities, but it has entered the 14 cities for testing and certification. The cost will cost 1 million yuan, a system, each entering a market, the need for testing admission fees ranging from 20,000 yuan to 80,000 yuan.
The manufacturers of exterior wall thermal insulation materials are even more prosperous, and even many family workshop-type enterprises have joined them. The market has only just warmed up and it has fallen into a dark and unpredictable price war. Large companies cannot survive, and small businesses can The gold rush, leaving behind a lot of architectural hidden dangers. Such as insulation board and decorative integrated molding installation system, in order to achieve good decorative and thermal insulation effect, the cost per square meter should be around 300 yuan, but in the same project tender, some companies have reported a price of 150 yuan, so that the owners No choice. At present, the poor living environment has not made a well-known brand in the external wall insulation material industry.
European and American standards basically provide that non-flammable insulation materials should be used in buildings over 22 meters. It is indeed people-oriented and safety first. However, China lacks such quality materials to pass through, but there are a large number of organic flammable materials. For example, according to European and American standards, incombustible materials are scarce. Excessive production of organic materials is not conducive to energy conservation. The standards of foreign countries were formulated earlier, but in practice they are all seeking "breakthroughs." Although the methods used in the experiments have relatively high requirements for construction management, they are, after all, a solution.
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