Construction technology measures of polyurethane pouring method

Pouring method construction technical measures 2.1 pouring method construction polyurethane rigid foam exterior wall external insulation system can be divided into two methods of removable formwork and non removable formwork construction The construction level of the detachable touch system generally includes: treatment of the wall base interface agent, polyurethane rigid foam insulation layer, insulation layer interface agent and facing layer The construction level of the form free system generally includes: wall base interface agent, polyurethane rigid foam insulation layer, special formwork and facing layer 2.2 the base wall of polyurethane rigid foam construction by pouring method shall meet the requirements of current specifications GB 50204-2002 and GB 50203-2002 The base wall meeting the acceptance standard can be leveled without plastering mortar, and the polyurethane rigid foam insulation layer can be directly poured on the concrete surface and masonry 2.3 during the pouring construction, the polyurethane rigid foam insulation layer at the deformation joint of the wall shall be reserved with a separation joint, which shall be sealed with polyurethane or other high elastic sealing materials At the same time, the effective connection between the rigid polyurethane foam and the window frame shall be ensured at the window part, and the groove type drip line shall be made at the upper window and the lower side of the windowsill 2.4 the polyurethane rigid foam insulation layer should be provided with horizontal separation joints along the wall layer height; the vertical separation joints should be provided in the longitudinal direction with no more than two openings and no more than lorn 2.5 it is not necessary to level the surface of polyurethane rigid foam external insulation layer by pouring method, but the interface treatment for the construction of facing layer shall be done well, such as brushing interface agent, etc This is very important for the polyurethane rigid foam insulation layer which can be removed and poured, so as to ensure more reliable construction of the subsequent facing layer, and then carry out the facing construction according to the corresponding requirements of the facing layer 2.6 the casting method can be used for formwork removal construction If the finishing layer is painted, the plaster for painting shall be strengthened with alkali resistant glass fiber grid cloth Within the range of outdoor natural floor + 2.om, the wall shall be fully pasted with double-layer grid cloth to strengthen The plastering mortar between the double-layer grid cloth must be dense and full, and the external corners such as door and window openings shall also be protected and strengthened.