The system is described in detail with an engineering example.
With the increasing requirements for energy conservation and environmental protection, the insulation technology of building maintenance structures is also increasingly strengthened. In particular, external wall insulation technology has also achieved considerable development, and has become an important building energy-saving technology in China. For many years, the building wall has generally used a single material, such as hollow bricks and aerated concrete walls, which cannot meet the requirements for thermal insulation. Therefore, the use of enclosure materials and high-efficiency thermal insulation materials constitutes a composite wall. According to the location of the insulation material, it is divided into various ways, of which the external wall interior insulation and exterior wall insulation are the two most commonly used methods. In the initial stage of China's building energy-saving technology, the application of external wall thermal insulation is relatively extensive. China's energy conservation standards have increased from 30% to 50%, and internal insulation has not been adapted to the needs of the new situation. Therefore, external insulation is the key work we need to research and promote.
1 Insulation technology of external walls The external wall insulation construction is to make insulation layers inside the external wall structure. Because of low cost, convenient construction and other reasons, it is widely applied in the early stage. In many years of practice, the external insulation of the exterior wall also revealed some disadvantages.
Due to materials, construction, construction and other reasons, the decorative layer is easy to crack; it is inconvenient for users to decorate and drop accessories; takes up indoor space; because there is no protective layer on the floor, column, etc., it causes “thermal bridge†phenomenon, and the heat loss is large. When the humidity in the room reaches a certain condition, condensation may form, and the immersion or freezing and thawing of the dew condensation water can easily cause cracking and moldy of the insulation layer.
Due to the improvement of building energy efficiency standards and some irrationalities in the internal insulation technology, it is determined that it must be replaced by external insulation.
2 exterior wall external thermal insulation technology External wall external insulation is to put the thermal insulation system outside the external wall, so that the building achieves the effect of thermal insulation and energy saving.
2.1 Advantages of External Wall External Insulation External wall external insulation is a kind of building insulation energy-saving technology that is vigorously promoted. Compared with external insulation and internal insulation, the technology is reasonable and has obvious advantages. 1. Wide application scope, exterior insulation It is applicable not only to the northern winter thermal insulation building but also to the southern summer heat insulation area. It is applicable to both new buildings and energy-saving renovations of old buildings, and can satisfy architects' unlimited imagination.
The heat preservation effect is obvious, and it can basically eliminate the “thermal bridge†influence on various parts of the building.
The protection of the main structure, placed on the outside of the building insulation layer, greatly reducing the natural temperature, humidity, ultraviolet light and other effects on the main structure, to maximize the life of the building.
It is conducive to improving the indoor environment. The external insulation of the exterior wall enhances the thermal stability of the interior and can prevent condensation and mildew in the interior.
Expansion of indoor use space, compared with internal insulation, the use of exterior insulation to increase the use of each area of ​​about 1.5m2. 2.2 China's current main external insulation technology foam polystyrene glass fiber grid mesh polymer mortar system. The foamed polystyrene board is fixed on the external wall with mechanical or adhesive, the surface is thin plastered, and reinforced with a grid cloth. 2. Extruded polystyrene insulation board glass fiber mesh polymer mortar system.
Cast-in-situ concrete template built-in extruded plastic system. During construction, the steel wire rack extruded board is placed on the inner side of the outer wall outer mold to be poured, the heat insulation board and the wall are once lived, and after the mold is removed, the outer wall insulation system of the rubber powder polyphenylene granules is combined. The rubber powder polyphenyl granule insulation mortar with good powder is directly applied to the outer wall surface, and the crack-resistance mortar is wiped after reaching a certain strength, and is pressed into a grid cloth or a galvanized steel wire net and a nylon expansion bolt is fixed.
Advantages of Adhesive Powder Polystyrene Particles External Wall Insulation System: The adhesive layer, insulation layer, anti-crack protection layer and decorative layer of thermal insulation mortar, and its structural layers allow flexible deformation, self-contained system and flexible resistance. The role of cracking, to completely solve the problem of cracks in the external wall; thermal insulation slurry construction on the flatness of the base wall is not high, the construction process is relatively simple, easy to grasp; insulation paste material in the paste state of good plasticity, strong adhesion, Easy to detail construction, can fully solve the doors and windows openings, plates, columns, etc. First: Wang Qinghong, male, born in May 1965, graduated from Changzhou Coalfield Geological School of Coal Quality Laboratory Specialty, Assistant Engineer, Shanxi Coal Geology 144 Exploration in 1988 Hospital, Nanxun Street, Hongdong County, Shanxi Province, 041600. Table 1 Performance indicators for rubber powder Item index Initial setting time / h Multi 4 Final setting time / h12 Stability Test method for cakes) Acceptable tensile bond strength / MPa more than 0.6 infusion The “heat bridge†problem with tensile bonding strength/MPa and more than 0.4 parts is beneficial to improve the heat preservation effect; the cost is lower, and the cost can be reduced by 20 yuan/m2 compared to the polystyrene insulation. Therefore, the rubber is gradually promoted. Polystyrene particles exterior insulation and finish systems Tao, Wu Hua new chapter forever. Energy-saving design of buildings and exterior thermal insulation should be thrown away J. Construction of the project Huang Zhenli, Song Changyou. Development and rejection of external insulation system of ZL adhesive polyphenylene granules laminated polystyrene board External construction technology, 2005 Dai Minhua, Wang Peiming. Research on High Efficiency Exterior Wall Insulation Mortar J. Shanghai Building Materials, 2006 5): 7-9. (Editor: Wang Yongsheng) First: Tang Xiangqun, male, born in 1974, graduated from Changzhou Institute of Technology, engineer, Jiangsu Institute of Technology in 1996, Changzhou City, Jiangsu Province, 213164.
PVC Electrical Tape is made from PVC as the backing material,which are coated with rubber Pressure-sensitive adhesive.
They are resistant to high voltage, fire and weather, commonly designed for connecting separated electrical wires for electrical insulating and protection purposes
1) Made from PVC as backing material
2) Coated with rubber pressure-sensitive adhesive
3) Adhesive: Rubber
4)Thickness: 0.10mm-0.195mm
5)Peeling strength: more than 1.6/1.8 (N/cm)
6)Tensile: more than 16-28N/cm
7)Tensile strength: 160%
8)Voltage broke down: 6.0kv, 8.0kv
Excellent viscosity and flexibility, withstand voltage, burn-resistance, cold-resistance, high-tensile, suitable for insulation wrapping wire, cable and automobile line bunch.
Length and width available according to customers request
Different backing material is available, such as PVC, Kraft, Cloth etc.
Different size and colors is available.
PVC Electrical Tape
Black Electrical Tape,Electrical Tape,Pvc Electrical Insulation Tape ,Pvc Insulation Tape
Jining xunda pipe coating materials co., ltd. , https://www.pipeanticorrosion.com