Cement mortar plastering thick steel wire rack plate external insulation insulation structural design deficiencies exist: Such external insulation commonly used with steel wire rack polystyrene board asbuy synthetic decking used in boat china thermal insulation material body, there will be no steel mesh affixed to the side of the external wall, with a special fixture is fixed, there is steel mesh in the side ordinary 20 ~ 30mm mortar leveling. Because of this practice plastering mortar thick, so cracking phenomenon is relatively common for the following reasons: 1) ordinary cement mortar itself is easy to produce a variety of shrinkage, and there is the strength of the growth cycle is short, long volume contraction cycle contradiction under constraints, when the tensile stress exceeds the volume contraction of the tensile strength of the cement mortar will appear crack.
In the main structure of the insulation layer under the protection of the less affected by temperature deformation, and 20 ~ 30mm in outer thermal resistance of screeds great polystyrene board, and therefore affected by ambient temperature and have a greater deformation. And have a greater outdoor wood privacy panelsrelative deformation cement polystyrene board on both sides of the material by the environmental effects of temperature difference, causing cracking. In addition, as insulation board flatness is difficult to control the thickness of the plaster will cause leveling uneven, resulting in partial shrinkage and uneven temperature stress causing cracks. 2) reinforcement unreasonable cause cracks.
Steel wire frame positions in cement mortar reinforcement equivalent to one-sided manner, positive and negative air pressure, thermal expansion and contraction, shrinkage and swelling earthquake are in two-way or multi-way, this kind of reinforcement near the way stress dispersion external walls are limited, would not achieve the outdoor deep seating furnitureeffect of cracking due. incomplete outer insulation caused cracks. External insulation, we often focus on the overall wall insulation, but ignored the parapet, awning, dormer windows, bay windows, balconies and other parts of the outer insulation, leaving this part of the crack or reduced life. It should also be considered waterproof, preventing moisture intrusion into the insulation system to avoid frost action cause durability normal life breaking system, the impact of the system and the system.
In the main structure of the insulation layer under the protection of the less affected by temperature deformation, and 20 ~ 30mm in outer thermal resistance of screeds great polystyrene board, and therefore affected by ambient temperature and have a greater deformation. And have a greater outdoor wood privacy panelsrelative deformation cement polystyrene board on both sides of the material by the environmental effects of temperature difference, causing cracking. In addition, as insulation board flatness is difficult to control the thickness of the plaster will cause leveling uneven, resulting in partial shrinkage and uneven temperature stress causing cracks. 2) reinforcement unreasonable cause cracks.
Steel wire frame positions in cement mortar reinforcement equivalent to one-sided manner, positive and negative air pressure, thermal expansion and contraction, shrinkage and swelling earthquake are in two-way or multi-way, this kind of reinforcement near the way stress dispersion external walls are limited, would not achieve the outdoor deep seating furnitureeffect of cracking due. incomplete outer insulation caused cracks. External insulation, we often focus on the overall wall insulation, but ignored the parapet, awning, dormer windows, bay windows, balconies and other parts of the outer insulation, leaving this part of the crack or reduced life. It should also be considered waterproof, preventing moisture intrusion into the insulation system to avoid frost action cause durability normal life breaking system, the impact of the system and the system.