Design and Application of Board-Mounted Insulation Board and Exterior Insulation System â–¡ Design and Selection of Yangtongxing Wall Materials in Tianjun County, Zhejiang Province, Quzhou City Keda New Building Materials Co., Ltd. Currently, the main illnesses in the wall insulation project are as follows: Difficulties in reaching standards; energy-saving materials have the problems of cracking, seepage, and even falling off; the installation process of the project is complex, and the impact of man-made and environmental factors is too great, and quality and duration control are difficult to ensure.
There are many reasons for these phenomena, but the main problems are as follows: First, developers or construction companies are eager to pursue low-cost materials or low-cost solutions to reduce economic pressure, and the real cost-effective thinking and energy-saving policies are not enforceable; secondly, they are optional. The scope of materials (plans) is narrow. Designers often choose some of the so-called mature materials (or schemes) within the existing normative standards for mechanical design. They do not further analyze and prove the characteristics of the materials and the suitability of the project. It is the release of product manufacturers and technical information of the material manufacturers and the insufficient promotion of the relevant department's argumentation. The author believes that several technical and economic issues of commonly used energy-saving building materials deserve our attention.
The difference between the measured value of the thermal conductivity and the actual value of the on-site construction; the feasibility of the construction operation and the controllability of the construction thickness; the compatibility of the polystyrene particles and the inorganic binder.
2, benzene board plaster insulation system: benzene board dimensional stability, especially the safe use of temperature range; benzene board adhesion (sticking) difficult problem how to solve.
3, the external wall insulation system: the solution to the problem of cold and hot bridges; the reduction of the effective use of the area; the maintenance of the interior decoration insulation; fire safety.
4. Masonry self-insulation system: under the condition of wet and dry, the difference of energy-saving efficiency; the problem of cold and hot bridge; remediation of shrinkage crack of block itself.
5, inorganic foam board (block) insulation system: water absorption control; dimensional stability.
Only by taking seriously the technical problems existing in various materials and adopting scientific solutions and remedial measures, can we achieve energy-saving and material-saving indicators more effectively.
External insulation system failure causes external wall external insulation system, because it does not exist cold and heat bridge does not affect the effective use of the area, indoor decoration factors such as the impact of small after being widely used by everyone, the southern region more choice of powder polystyrene particles insulation mortar, A large number of benzene board and thin plaster external insulation systems were used in the northern areas. However, the current external wall insulation program is in doubt: First, there are hidden dangers of cracking and emptying in these systems. The second is that the external decoration operation is difficult after the construction of the insulation layer. I believe that the key points for forming these questions are: 1. Bonding problems are not well resolved. The compatibility of the organic foam particles and the inorganic adhesive mortar is poor. Although the adhesion problems are improved by the modification of the rubber powder and the tackifier, the problem cannot be fundamentally solved. Therefore, while ensuring or increasing the amount of powder, the foam particles (plate body) should also be subjected to surface treatment by physical or chemical methods, such as the coupling of foam particles on the surface, and then compounded with inorganic bonding materials on the wall; The board adopts roughening and embossing to enhance the surface contact area and roughness and improve the bonding effect; for example, if an easy-to-paste interface layer is added on the surface of the benzene board, the problem of difficult bonding can be more easily eradicated.
2. The dimensional stability of the energy-saving material itself. Thermal expansion and contraction is another cause of the cracking of the insulating decorative layer (especially the benzene board thin plastering system). To reduce the destructive force of this factor, on the basis of improving the flexibility of crack-resistant plaster, more attention should be paid to the reasonable use temperature of the energy-saving board. Because the critical temperature of the theoretical use of benzene board is in general, as long as it is fully valued or recognized The key factors caused by the hidden dangers of the wall insulation system are avoided and overcome. The external wall insulation system should be a building energy-saving scheme that we should actively promote.
Insulation and decoration integration is the best choice for external insulation insulation layer problem is solved, and decoration layer construction is a problem. For example, traditional post-renovation construction often leads to problems such as cumbersome operation procedures, long construction period, limitations in the selection of materials, and difficulties in ensuring quality and safety performance. Therefore, the integration of insulation and decoration is the most effective way to solve the problem. The reasons are as follows: 1. The insulation layer is integrated with the decoration layer, eliminating the cumbersome procedures and quality control difficulties of plastering the mortar, shortening the construction period, saving the labor force, and at the same time reducing the degree to some extent. Construction safety hazards; 2. Prefabrication under the state of factory standardization, the combination of insulation layer and decorative layer is solid and reliable, eliminate hidden dangers of decorative objects, and ensure the quality of the decorative layer surface with the construction of science and technology; 3. Wide range of decorative layers, easy to meet the appearance Decoration requirements, such as the use of pre-coated inorganic board finishes, thin stone panel finishes, painted-coated alloy panel finishes, and colorful tile pre-applied finishes, as well as improved decorating levels and flexibility. (such as -4) 4. The use of wet affixing, affixing and dry hanging construction techniques can achieve the purpose of insulation and decoration in a concise and effective manner, and in particular provide great construction convenience and quality for high-rise building energy-saving projects and existing building energy-saving renovation projects. Security protection.
5. It is easy to achieve the goal of energy saving of 65% and it is beneficial to truly implement energy conservation policies. The energy-saving board is prefabricated under the factory standard conditions, and the thickness and performance can be more easily adjusted and controlled, which can avoid the impact of on-site construction and environmental factors, and ensure the realization of energy-saving design goals.
PUBS Polyurethane Insulation Decorative Panel and External Insulation System The Ministry of Construction of the People's Republic of China established the Working Group for the Promotion and Application of Polyurethane Building Energy Conservation Projects on September 9, 2005, and conducted a large number of investigations, researches, material analysis, and engineering pilots. It is a rigid polyurethane. Foam acceleration has played a role in promoting the application of building energy-saving projects in China. After nearly one year's efforts, Zhejiang Quzhou Keda New Building Materials Co., Ltd. successfully developed a PUB*S polyurethane insulation decorative integrated plate series product with 5 independent intellectual property rights (patents) at the beginning of this year.
In the early stage of development, this product puts forward the following design basis based on the key points of the quality control of the exterior wall thermal insulation project: the material must have excellent thermal insulation performance; the structure must solve the bonding problem of the thermal insulation material plate; the mechanical strength is high, and the dimensional stability Good sex; Insulation and decoration integration; Convenient construction operation, economical and reasonable cost.
To this end, we take the following measures in the development process: (1) Use rigid polyurethane foam as an energy-saving carrier. (2) Adjust the proportion of black and white materials to improve the mechanical strength and dimensional stability of the foam layer. (3) The use of fibrous polyester non-woven direct composite technology, surface pretreatment of the foam board to solve the paste problem. (4) The inorganic board pre-coating and the pre-coating of the alloy plate are treated with high-quality resin paint and fluorocarbon paint to ensure the color retention performance and weather resistance of the decorative surface layer. (5) The use of special adhesive mortar, hardware anchors and weather-resistance sealant and other supporting materials and curtain wall node processing technology combined to complete the system technical performance.
2. Structural characteristics and product characteristics The product consists of a three-layer structure: the surface layer is a decorative layer; the core layer (middle layer) is a foam insulation layer; the bottom layer is an easy-to-paste interface layer.
Low thermal conductivity, easy to achieve energy-saving design requirements of 65%. The standard value is set to 0.024w/k*m, which is about 1/2 of the EPS board and 1/3 of the pellet insulation mortar. With the same energy-saving index requirements, the thickness of the energy-saving layer can be reduced; taking into account the waterproof and moisture-proof function of the outer wall , To ensure the stability and long-term effect of energy-saving effect; degree of large (200KPa), is 2 times the EPS board. Truly lightweight and high strength; high degree (theoretical value 120*C, safety value 100*C), can be widely applied to all areas of our country; easy to paste, and strong. Completely eradicate the cracks and empty drums, less hidden dangers of security; integration of insulation and decoration, labor and materials, high grade, good quality, long life; decorative surface luxury, imitation curtain wall (metal, stone curtain wall) effect is realistic, cost is only It is 1/2 to 1/3 of the curtain wall, and its function is doubled. It is one of the first choice products for high-rise building and high-rise building external wall thermal insulation projects.
Conclusion 1. The bonding properties of organic insulation materials are an important factor in the success or failure of exterior insulation systems. In order to ensure the quality of bonded mortar and trowel, the surface of the insulation layer (board) should be pretreated.
2. The dimensional stability of the insulation material is one of the main reasons for the cracking of the external insulation system of the external wall. The coefficient of contraction of the material and the safe use temperature are the main factors to be considered when selecting the material.
3. Insulation and decoration integration and board-mounted construction techniques are effective ways to eliminate the hidden dangers of the quality and safety of exterior insulation systems. 0 Construction Technology 75
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