Moderator: mr draws a hundred women: In order to promote the gathering on September 9, 2005, "the promotion and application of the outer wall insulation technology of polyfoaming in China, under the guidance of the work. "In the Ministry of Construction Science and Technology Division's guidelines, å©m promotion and preparation," Wei ester hard foam external insulation engineering technology on May 19, 2007, the Ministry of Construction is the development of the bubble external thermal insulation system.
Tai Jiuzhou (Jianke 2007 Qiao f4-type external release polyurethane rigid foam exterior insulation engineering technology polyurethane rigid foam exterior insulation system performance indicators profile polyurethane construction energy-saving application promotion work group compensation bubble performance Teng system including polyurethane Hard performance m performance, sputum and other performance indicators of honing m, overall performance indicators of the external insulation system.
First, the material performance index of polyurethane rigid foam external wall insulation system is particularly good for the performance of ester hard foam. Therefore, the technical guidelines for the engineering of the concrete (the following simple guide ") are the key properties of the ester hard foam. Provisions have been made. See Table U. Guidelines also make appropriate provisions for the performance of the supporting materials used in the I vine hard foam external temperature system, such as plastering glue, adhesive, alkali-resistant mesh, casting formwork, etc.
The overall performance requires the final quality of the polyurethane hard foam exterior insulation project for the vinegar hard foam, so the guideline has made special provisions for the overall performance of the polyester rigid foam exterior insulation system.
(The overall performance requirements of the external tempering system of D vinegar hard foam are shown in Table 2. (2 pairs of m-face layer with å¡-shaped vinegar hard foam outside the singular temperature system, such as sapphire shed I1X ester hard bubble outside the temperature厩 厩 å¡ å¡ å¡ å¡ å¡ å¡ å¡ å¡ ç¡¬ 硬 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于Water vapour oozing, basket lining, vinegar hard foam protection and finishing layer are separately carried out; because the system generally does not make the surface layer, the system does not bury the surface layer impervious to water; wind load performance, system The resistance and the weather resistance of the S are all carried out for the entire external insulation system.
(3 pairs of m-faced layers of the polyurethane on the surface of the insulation layer, the outer surface of the polyurethane foam, such as the layer of paint, QAli brick, etc.), the system's wind load resistance, impact resistance, water absorption, freeze-thaw resistance The performance, system thermal resistance, impermeability of the surface layer, water vapor permeability resistance and weather resistance of the system are all tested according to the corresponding methods specified in Appendix A of Technical Specification C3614-2004 for external thermal insulation engineering; The test method was carried out in accordance with the method specified in CB/T16172.
After the weather resistance test is carried out on the external thermal insulation system where the finishing layer is bonded to the surface of the thermal insulation layer, the system shall not cause foaming or peeling of the finishing layer, emptying or falling off of the protective layer, and no water seepage cracks may occur; The tensile bond strength of the system surface layer and the insulation layer shall not be less than anPa, and the damage site shall be located in the insulation layer. For the external thermal insulation system of the decorative layer, the appearance of the system shall not change significantly after the weather resistance test.
Table 1 Performance Index of Polyurethane Rigid Foam Materials Spraying Method Casting Method or Dry Hanging Method Apparent Density (kg/rt) Thermal Conductivity (V/nK) Tensile Bond Strength (kPa) Tensile Strength (kPa) Fracture Extension Rate of water absorption resistance Dimensional stability Burning average burning time (s) Average burning range (nn) Energy density level (SDR) Table 2 Overall performance requirements of polyurethane rigid foam external wall insulation system Project requirements Requirements Project indicators require wind resistance The load performance system wind pressure value Rd is not less than the wind load design value. For the external thermal insulation system in which the finishing layer is bonded to the thermal insulation layer, the safety factor K of the system should be not less than 1.5; for the external thermal insulation system of the decorative layer, the safety factor K of the system should be not less than 2. The thermal resistance system is resistant to wind. The pressure value Rd is not less than the wind load design value. For the external thermal insulation system in which the finishing layer is bonded to the thermal insulation layer, the safety factor K of the system should be not less than 1.5; for the external thermal insulation system of the decorative layer, the safety factor K of the system should be not less than 2. Impact resistance common type : Level 3, suitable for non-collision parts such as second and upper walls of buildings.
Reinforced: Class 10, suitable for vulnerable parts such as the first floor of a building and door windows.
The surface layer is impervious to water 2h, impervious to water vapor, water vapor barrier, water vapor, wet flow density, water absorption, water soak for 1h, the system water absorption is less than 1.0kg / ni, combustion performance, heat release rate, peak system, weather resistance, adhesion to the veneer layer After the weathering test, the external thermal insulation system on the surface of the insulation layer shall not cause foaming or peeling of the finishing layer, hollowing or falling off of the protective layer, and shall not cause water seepage cracks; the system with the surface layer, the surface layer and The tensile bond strength of the insulation layer shall not be less than a1IVPa, and the damage site shall be located in the insulation layer. For the external thermal insulation system of the decorative layer, the appearance of the system shall not change significantly after the weather resistance test.
(Finish)
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