Exterior wall insulation quality control measures

External wall insulation quality control measures Zhang Lei Shi Xiaolun Dezhou City Construction Committee This paper aims at the current external wall insulation practices and related issues, combined with the actual work of some feasible solutions.

Wall insulation is an important part of building energy conservation. It must seize the main part of energy dissipation and a wall. That is, the wall must use energy-saving materials with good thermal insulation properties, and at the same time improve the level of building energy-saving technologies. The two are closely integrated and comprehensively promoted. The improvement and promotion of wall insulation technology has become an important issue in building materials research. Since the energy-saving work was started nationwide, the wall insulation has undergone the development process of external wall interior insulation, sandwich insulation and external wall insulation. From the development process, it is not difficult to see that external wall insulation is an inevitable trend of development.

The body structure tends to have an adverse effect, and this wall insulation technique is quickly replaced by the form of internal wall insulation.

It is replaced by an exterior wall insulation system with superior characteristics. The reason for this is that the external insulation of the external wall can avoid the thermal bridge of the building envelope structure. The external wall bears the dual role of load-bearing and heat preservation. After adopting high-efficiency heat insulation material, the thickness of the wall is reduced. If rice is used for internal insulation, the thinner the wall, the thicker the insulation, and the problem of thermal bridges will become more prominent. During the cold winter months, the thermal bridge will not only cause extra heat loss, but also may cause the inner surface of the outer wall to be wet, dew, or even moldy and drowning. The external wall insulation avoids the thermal bridge. Under the condition of using the same thickness of the insulating material, the external thermal insulation reduces the heat loss by about 20% compared with the internal thermal insulation, thereby saving thermal energy.

After the external wall insulation is adopted, the internal solid wall has a large heat capacity, and the interior can store more heat, so that the indoor temperature change caused by solar radiation or intermittent heating can be slowed down, and the room temperature is relatively stable, especially in the summer, the external thermal insulation layer can block the sun. The entrance of radiant heat and the reduction of the combined effect of high outdoor air temperature will reduce the internal surface temperature and indoor air temperature of the exterior wall, make the living environment comfortable, and have a cool winter and cool summer effect. In addition, the “freedom of heat” generated by factors such as solar radiant heat, human body heat dissipation, household appliances and accidental heat dissipation has been better utilized, which is more conducive to energy conservation.

With external wall insulation, the main wall is protected. Outdoor climate change causes a large temperature change inside the wall to occur in the outer insulation layer, so that the inner main wall has a higher temperature in winter, lower humidity, and a gentler temperature change, thereby reducing thermal stress. The risk of cracks, deformation, and damage caused by stress changes in the main wall is greatly reduced, and the life span is greatly extended.

The use of external insulation can increase the internal surface temperature of the external wall, so that the indoor air temperature is reduced, and the thermal environment is more comfortable. It can be seen that under the premise of adopting external insulation and maintaining the indoor thermal environment quality, the purpose of saving energy consumption can be achieved by appropriately reducing the heating load. Taking the 50% standard of building energy conservation as an example, a university will use 9,000 tons of coal for heating (approximately 3,000 students and faculty) each year. If energy savings of 50% are achieved through the use of external insulation, energy savings will be 5,000 tons per year. Ton. With the current market price of RMB 500/ton, it will save 2.5 million yuan in expenditure in one year. This does not include the associated benefits of reducing boiler losses due to less coal burning. As we all know, 50% of air pollution comes from coal-fired emission pollution (40% from vehicle exhaust emissions and 10% from other pollution sources), so reducing coal consumption can directly reduce air pollution, and the resulting social benefits are: Can't use numbers for calculations.

With internal insulation, most of the internal insulation is severely damaged when the new house is renovated, and the insulation effect is greatly reduced. The use of external insulation not only does not have these problems, but can also be synchronized with indoor decoration, water, electricity, heating and other installation operations. The internal insulation has problems such as construction disturbance and temporary relocation, and it reduces the use area. At present, many buildings that are not suitable to be demolished and rebuilt and only make necessary renovations are the most economical and most favorable choice for external insulation.

External insulation has a wide range of applications. It is applicable to both heating and air-conditioning buildings; it applies to both civil and industrial buildings; it can be used for both new and old buildings; it can be used in low-rise and multi-story buildings, but also In the middle and high-rise and high-rise buildings, in addition, if you can do the design of the building facade, the building will look very good. Especially in the renovation of old houses, external insulation can greatly improve the appearance of the house.

To sum up, since the main body of China's outer walls is basically a heavy material, the use of exterior wall thermal insulation technology will enable the rapid development of building energy conservation. Although the price of external insulation is relatively higher than that of internal insulation, the actual cost is not much higher as long as the technology is properly selected. In particular, due to the fact that external insulation has increased the use area by nearly 2% compared with internal insulation, the unit price has actually been reduced. Combined with the benefits of energy conservation, improvement of thermal environment and atmospheric environment, the comprehensive benefits are very significant.

With the continuous promotion of energy conservation, the external insulation industry has also made rapid progress. At present, the domestic building energy-saving market is a mixed bag, and some energy-saving buildings cannot achieve the goal of benefiting future generations. Buildings originally based on energy-saving are often turned into rubbish buildings. In order to ensure the thermal insulation efficiency of external insulation system, good stability, high durability, strong anti-impact performance, no condensation in the wall, and cracks or fall off due to normal deformation of different main walls, it must be strictly controlled from two aspects of materials and construction. : (a) To establish a systematic concept in material control.

The exterior wall insulation system is not a simple patchwork of several monomer materials, but an organic combination of high-quality monomer materials. This combination ensures that the compatibility between the monomer materials is reliable and long-lasting. The concept of the system is essentially to achieve 1 +1 to be greater than 2 goals. But at present, many external wall insulation manufacturers are outsourcing adhesives, glass fiber mesh cloth and paint, and then put the company's brand, a simple combination even if the external wall insulation system. Because there is not enough time and energy to study and test the compatibility between these materials, whether this simple addition meets the basic quality requirements for external insulation is unknown to most manufacturers. This irresponsible practice seriously interferes with The building energy-saving market has made developers or owners confused when choosing products, but instead chose low-quality products to become the test base for these products.

Binder is an extremely important part of the external wall insulation system.

At present, the binders are mainly liquid and dry powders.

Liquid-type adhesives generally need to be mixed with cement and water in a certain proportion at the construction site. Because they contain a high proportion of pure acrylic resin, they have high bond strength, good elasticity, high flexibility, and high resistance to powdering. Such characteristics; dry powder type binder only need to add appropriate amount of water to stir at the scene, with the ratio of easy control, low cost and other advantages. Due to the high cost, only a few external wall insulation manufacturers still adhere to the use of liquid-type adhesives. However, the quality of products provided to users is extremely superior, especially in terms of the overall weatherability of the system. The weather resistance can effectively prolong the life span of buildings and bring huge benefits to residents and society.

The flexibility and air permeability of exterior insulation systems cannot be ignored.

The elasticity of the system prevents cracking and thus provides a good waterproof effect. Breathability originated in developed countries such as Europe and the United States, because of the relatively high standard of living of these countries, especially the comfort of living has always been the primary consideration for selection, while the comfort requires the wall to have a good upper reach. The traditional concept of "rich resources" and blind optimism have formed a sense of urgency over mineral resources and established the right concept of resources, environmental concepts and concepts of sustainable development.

Second, efforts will be made to improve the utilization of mineral resources.

Actively use low grade iron ore, bauxite, phosphate rock and other resources. Focus on resolving the problem of the low recovery rate of thick seams and small coal mines in the north. By 2010, the average coal mine recovery rate in the country will increase by 10 percentage points on the current basis.

Third, rely on science and technology to improve the level of protection and rational use of mineral resources. Science and technology are the primary productive forces, and they are the most active factor in promoting economic and social development. They are also important factors in promoting the development of the mining industry. Plan and focus on the key and difficult issues in the management and utilization of mineral resources, increase the scientific management of China's mineral resources, increase the scientific and technological level of exploration, mining, selection, and smelting, and promote the application of new technologies and methods. Restricting backward development and processing methods and implementing mandatory reforms; Encouraging the study of the national mineral shortage theory and prospecting methods; Encouraging the comprehensive development and comprehensive utilization of minerals; Promoting the integration of production and scientific research through the reform of management systems, and promoting Science and technology are continuously transformed into productive forces, making science and technology a real driving force for the development of China's mining industry.

Fourth, strengthen the macro-management of mineral resources, properly plan the mineral resources, formulate resource policies that are conducive to the development of circular economy in the development of mineral resources, and establish a unified, coordinated, well-defined and functional mineral resource based on the overall planning of mineral resources. The planning system, establishing the concept of circular economy, saving and rational use of resources, integrated the comprehensive utilization of mineral resources into the mineral resources planning system, and further integrated it into the national circular economy development promotion plan. Through the implementation of the demonstration project of comprehensive utilization of mineral resources, the development of circular economy in the mineral resources sector will be promoted. Organize and revise the “Catalogue of Comprehensive Utilization of Resources” to incorporate the comprehensive utilization of mineral resources into the scope of national comprehensive utilization of preferential policies.

To sum up, our country's mineral resources have caused serious damage and waste to a certain extent during the past decades of mining. We must ensure the safety of our production and the protection of the ecological environment while developing. We must pay equal attention to mineral development, environmental protection, and economic growth. We must adhere to system innovation and mechanism innovation, and promote the building of a "resource-saving, environment-friendly" society. Coordination, sustainable development concept, building our harmonious society

SBR Rubber Sheet

Sbr Rubber Sheet is a copolymer of styrene and butadiene and has properties similar to Natural Rubber. It has good abrasion resistance, excellent impact strength, very good resilience and a high tensile strength.

It can be red,green,grey or blue colour etc and can cut difference size.

SBR Rubber Sheet

Sbr Rubber Sheet,Industrial Rubber Sheet,Common Rubber Sheet,Black Rubber Slab

HEBEI HENGDA SEALING MATERIALS CO.,LTD. , https://www.hengdasealing.com