Domestic insulation materials can be divided into perlite inorganic thermal insulation materials, organic thermal insulation materials and composite thermal insulation materials. The organic thermal insulation material has light weight, good processability, high compactness and good thermal insulation effect, but the disadvantages are: not resistant to aging, large deformation coefficient, poor stability, poor safety, easy to burn, poor eco-friendly performance, construction It is difficult, the project cost is high, its resources are limited, and it is difficult to recycle.
1. Organic insulation materials
In China, Tianjin, Shanghai and other provinces and cities in the promotion and application of new insulation materials, progress is relatively fast. The construction of foam plastic sheet material insulation project is relatively difficult, and the process technology is relatively complicated. The application of building insulation engineering in China has a history of more than ten years. From the beginning to the present, the insulation materials industry is stable to the system and safe. Sexuality, service life, eco-environment and other aspects are the most controversial, and it is easy to produce engineering quality and safety hazards. The main factors are low strength of insulation board, poor bearing capacity, easy deformation, easy burning, easy degradation, etc. Moreover, these oily The organic foam insulation material is difficult to be firmly combined with the wall by the cold glue of the mortar, and remains unchanged for several decades. Although there are reports that foreign countries have been stuck on the wall for 30 to 40 years, but from Material and professional technical analysis, lack of theoretical basis. In order to prevent radiation-absorbing materials, rock wool, and even treated crop straws, it is possible to use waste materials which are heat-insulated and innocuously treated, and hollow materials which are produced by techniques such as foaming. Innovation and development, China's building insulation and energy conservation work will continue to develop, this is a long-term task. Therefore, the construction insulation in the southern region should be based on the main purpose of blocking the insulation air. The thermal insulation material should be made of perlite inorganic materials.
2. Composite insulation material
Some wall bases are particularly dry, especially through brick walls, hollow bricks, etc., which can be sprayed with water to wet the base layer before construction to weaken its water absorption capacity, because these materials have strong water absorption and high water absorption, which will affect the attachment of the insulation layer. Focus on. The development of insulation materials and technology focuses on innovation. It is important to study composite insulation materials with low energy consumption, high insulation efficiency, good recycling, good ecological properties, good system stability and low cost, especially in the use of waste. , has a good development prospects.
3. Perlite inorganic insulation material
With the intensification of the world energy crisis and the further deterioration of the ecological environment, China's energy and environmental protection problems have become more prominent due to the continued rapid development of the economy. The impact of building insulation and energy conservation on the ecological environment has drawn the attention of the industry. The exterior walls of the building are to be insulated. The use of other insulation materials will be astonishing, not only consume a lot of resources, but also cause new environmental problems. Insulation and energy conservation work must be oriented to actual needs. It should be based on local environmental and climate characteristics, construction material composition, resource advantages, resource recycling, safety, human and environmental protection needs, etc., to select targeted, highly applicable insulation. Materials and systems cannot be developed blindly. In the development of insulation materials, although there will be many new materials, some existing insulation materials will not be eliminated soon.
From the material system analysis, it can be seen that the function and characteristics of a material in the thermal insulation system are limited. How to deepen the properties, mechanism of action, interaction and analysis of various related raw materials, scientific selection, reasonable It is very important to apply this, followed by engineering technology research, product quality is good, if the process is not reasonable, the process is not perfect, the project quality management is not in place, it will affect the stability of the whole insulation system and its function is normal. Play.
Building insulation and energy conservation should be coordinated with the socio-economic sustainable development, comprehensive utilization of resources, and ecological environment insulation. This is a long-term plan that must be seriously considered in China's building insulation and energy conservation work. Specifically, we must insulate thermal insulation materials. Focus on research on performance and practical value, material stability and service life, process technology reliability, eco-friendliness and recyclability. We can also learn from the successful experiences of Western developed countries, but we cannot follow up blindly. It must be combined with China's national conditions and the actual needs of building insulation, otherwise we will not only pay for economic costs, but also the cost of environmental protection.
Building energy conservation is mainly to reduce energy consumption and reduce environmental pollution. To achieve these two objectives, it is necessary to study the two aspects of thermal insulation efficiency and environmental protection. We cannot ignore the ecological and environmental protection issues because of insulation and energy conservation. The environmental impact is whether it will cause harm to the ecological environment after being used or discarded. China's climate is complex and variable, and the temperature difference varies greatly. The significant climate is characterized by dry air noise, winter cold, wind and rain in the northern region. The heating time in the north is 120-150 days. The main requirement is the insulation effect. Selectively, foamed polystyrene board (EPS), extruded polystyrene board (XPS), sprayed polyurethane (SPU) or high-efficiency composite insulation materials; and the southern part of the air humidity, foggy, rainy, cold weather Less, hot and humid weather, except for star-rated hotels and restaurants with central air-conditioning, there is no heating in general buildings. When the outdoor sunshine is sufficient in winter, the outdoor temperature is higher than indoors. In this case, if polystyrene board is used Plastering exterior insulation system, the indoor temperature will not only feel warm, but will feel more cold. Organic and perlite inorganic thermal insulation materials also have some significant differences in performance and function. In terms of resources and environmental protection, perlite inorganic thermal insulation materials are superior to organic thermal insulation materials, and some new high-efficiency composite pearls can be recycled through scientific and technological means. Rock inorganic insulation materials, as well as the use of waste with insulation effect, the development and application of these materials and technologies will promote the scientific development of China's building insulation and energy conservation. Inorganic thermal insulation material has a slightly larger bulk density and a slightly lower thermal insulation efficiency, but it is fire retardant, has small deformation coefficient, anti-aging, stable performance, good combination with wall base layer and surface layer, good safety and stability, strength and durability of insulation layer. The property is higher than the organic thermal insulation material, the service life is long, the construction difficulty is small, the engineering cost is low, the ecological environment is good, and it can be recycled. The application of granular insulation slurry such as polystyrene particles and closed-cell perlite in building thermal insulation engineering is very expensive in terms of construction cost, especially in construction heat preservation project due to its low engineering cost, simple construction and uncomplicated technical process. In the past, it was widely used in some provinces and cities in the south. The above is also applicable to insulation and energy-saving projects such as hollow vitrified microbead insulation slurry, expanded perlite thermal insulation slurry, and high-efficiency inorganic composite.
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