Wall insulation materials in the construction of buildings public and eliminate [2011] 65 document requirements, requires the use of the combustion performance of Class A insulation board materials. External wall insulation material the use of composite phenolic foam board, cement foam insulation board, rock wool cement composites, the external walls of rock wool board, several major product of the external walls of glass wool board is currently able to meet the state No. 65 documentation requirements. Of these products, construction methods and extruded sheet, polystyrene board, etc. is the same construction process.
1, and enhance the network of choice:
Glass fiber mesh cloth as the key to crack the protection of soft pay into the enhanced material exterior wall insulation technology for rapid development, on the one hand, it can effectively increase the tensile strength of the protective layer, on the other hand because of their effectiveness dispersed stress, the original models can produce cracks dispersed into many smaller cracks to form the crack resistance. Outside the protection of the insulation layer cracking mortar is alkaline resistant fiberglass mesh long-term alkali resistance against the crack of decisive importance. On the analysis of the durability, high alkali-resistant fiber mesh cloth than the alkali-free mesh and mesh alkali durability is much better able to meet at least 25 years of use requirements, therefore, the choice of the enhanced network , it is recommended that the use of high alkali-resistant mesh cloth.
2, the protective layer material selection:
Cement mortar of high strength, shrinkage, deformation is not enough flexibility, a direct role in the outside of the insulation layer, weather resistance, which leads to cracking. To solve this problem using a dedicated cracking mortar supported by the enhanced network, and add the right amount of fiber in the mortar, cracking mortar creased less than 3. Such as outside facing brick in cement mortar cracking can also add a steel wire mesh light, the pitch of steel wire mesh should not be too small, and should not be too short edge of the tile should cover at least two Internet hole. steel mesh should be used to the anticorrosive good hot dip galvanized steel mesh.
3, no cavity constructed to improve the stability of the system: using the design of the insulation board to do fire, the insulation layer to withstand gravity and wind pressure due to the limitations of the fire wall board insulation strength, the insulation layer cracking, or even fall off . In order to improve the strength of the insulation board should be to maximize the bonding area, with no cavity, in order to meet the requirements of the destruction by wind pressure.
1, and enhance the network of choice:
Glass fiber mesh cloth as the key to crack the protection of soft pay into the enhanced material exterior wall insulation technology for rapid development, on the one hand, it can effectively increase the tensile strength of the protective layer, on the other hand because of their effectiveness dispersed stress, the original models can produce cracks dispersed into many smaller cracks to form the crack resistance. Outside the protection of the insulation layer cracking mortar is alkaline resistant fiberglass mesh long-term alkali resistance against the crack of decisive importance. On the analysis of the durability, high alkali-resistant fiber mesh cloth than the alkali-free mesh and mesh alkali durability is much better able to meet at least 25 years of use requirements, therefore, the choice of the enhanced network , it is recommended that the use of high alkali-resistant mesh cloth.
2, the protective layer material selection:
Cement mortar of high strength, shrinkage, deformation is not enough flexibility, a direct role in the outside of the insulation layer, weather resistance, which leads to cracking. To solve this problem using a dedicated cracking mortar supported by the enhanced network, and add the right amount of fiber in the mortar, cracking mortar creased less than 3. Such as outside facing brick in cement mortar cracking can also add a steel wire mesh light, the pitch of steel wire mesh should not be too small, and should not be too short edge of the tile should cover at least two Internet hole. steel mesh should be used to the anticorrosive good hot dip galvanized steel mesh.
3, no cavity constructed to improve the stability of the system: using the design of the insulation board to do fire, the insulation layer to withstand gravity and wind pressure due to the limitations of the fire wall board insulation strength, the insulation layer cracking, or even fall off . In order to improve the strength of the insulation board should be to maximize the bonding area, with no cavity, in order to meet the requirements of the destruction by wind pressure.
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