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Welcome to our official account, enjoy the latest resources, 4.5.28 precast exterior wall joint construction should meet the design requirements.
The joints of exterior wall panels can be plugged with backing materials such as polyethylene rods, and the outside can be caulked with building sealant.
Sealing materials such as joints of exterior wall panels shall comply with relevant provisions of technical specification for cast concrete structures jgj1.
4.5.29 the width and thickness of construction sealant for external vertical and horizontal joints shall meet the design requirements, and the construction sealant shall be caulked after the precast exterior wall panel is fixed.
The building sealant shall be uniform, straight, full and dense, and the surface shall be smooth and continuous.
4.5.30 the construction process flow of precast exterior wall panel joint is as follows: surface cleaning treatment → primer base treatment → pasting textured paper → backing material construction → application of sealant → sealant leveling treatment → appearance cleaning on both sides of the panel joint → finished product protection.
4.5.31 the following provisions shall be met when sealing waterproof adhesive is used for construction: 1.
The construction of sealing waterproof adhesive shall be carried out after the fixation and verification of precast exterior wall panel; 2.
The inner wall and side wall shall be clean and dry before construction; 3.
The performance and quality of caulking materials shall meet the design requirements; 4.
The injection width and thickness of waterproof glue shall meet the design requirements, and shall be firmly bonded to the wallboard without missing embedding and virtual adhesion; 5 when placing the official account, fill the material and glue it, and do not block the waterproof cavity.
The injection is uniform, straight, saturated, dense, smooth, and there should be no crack.
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