Panel moderator: Tong Yaqin's quality control of plastic powder, benzene, granules, and external insulation system, construction period, keynote text, Yang Jin, building energy-saving technology in practice, is a current trend, especially the technology of building external wall thermal insulation systems is becoming more and more mature. It has been widely used throughout the country. The external thermal insulation system of rubber powder polyphenylene granules consists of a clear interface layer, thermal insulation layer, anti-crack protection layer and veneer. The system effectively solves the problems of thermal insulation, crack resistance, wind pressure resistance, seismic resistance and fire resistance. , Water resistance, air permeability, construction adaptability and other issues, the technology uses a lot of wastes such as fly ash and recycled polystyrene, which is conducive to environmental protection and resource conservation, and is one of the most comprehensive external thermal insulation practices for technical advantages. .
However, as new materials and new technologies are used in the initial stage of promotion, many engineering and technical personnel do not know much about this, and the quality of the operating personnel of the construction units is also uneven, which may cause quality problems during construction. According to the author's own experience in the construction of rubber powder polystyrene particles external wall insulation system control points in the construction of a little narrative, in order to find bricks for jade, for everyone.
1. Composition of Polystyrene Granule Exterior Wall Insulation System The composite rubber powder polyphenylene granule outer wall insulation system is a relatively mature exterior wall exterior insulation system. The system consists of the interface layer + glue powder polyphenyl particle insulation layer + waterproof Crack-resistant mortar composite galvanized steel wire mesh (if the coating layer can be coated with plastic alkali-resistant fiberglass mesh) + exterior wall finishes. The scope of application of a wide range of materials, the process is simple and reasonable.
2.1 All materials used must have an inspection report: interface mortar, polyphenyl granule slurry, waterproof and crack resistant mortar, galvanized steel mesh, and plastic expansion anchor must all have quality qualified data.
2.2 There are formal inspection reports (should pay attention to the timeliness of formal inspection reports), and follow the formal inspection reports before large-area construction after entering the site.
2.3 After the above materials are put into the site, they must be retested and passed before they can be used.
2.4 The personnel of the site insulation slurry and anti-crack mortar shall be fixed in order to ensure the mixing time and the ratio of water addition is accurate.
3.1 Primary wall surface treatment: The wall surface should be clean, free from oil and dust, and the loose weathered part of the old wall should be removed. The raised part should be leveled off. When the concave part is large, effective measures should be taken to level it.
3.2 Interface treatment: Use a roller or a broom to take the prepared interface mortar and evenly brush it on the wall to form a 14mm convex and convex mortar coating.
4.1 Insulation slurry preparation and mixing: Insulation slurry is not allowed to be weighed and prepared at the site. It should be prepared in advance at the professional manufacturer's proportion to complete the bag to the site. According to the regulations, the water volume should be adjusted in the mortar mixing machine, stirring time for each plate. For no less than 8 minutes, the material should be used with stirring and used up within 4 hours.
4.2 Construction of insulation slurry: Polyphenylene granule insulation layer can be layered according to different design thickness, the thickness of each layer should not exceed 2mm. Wipe the first layer of slurry, wipe the second layer of slurry after 24h, until it reaches The thickness of cakes and chins. If the construction temperature is too low (construction temperature should not be less than 5 degrees Celsius), the interval time can be appropriately extended, and the insulation layer can be subjected to the next process after curing and drying (generally 5 days).
5. Construction points of composite galvanized steel wire mesh for waterproof and anti-cracking mortar After the completion of heat-preserving slurry surface, the waterproof anti-cracking mortar is first wiped 3~4mm, and the galvanized steel wire mesh is hung and anchored with plastic expansion anchor bolts, after which the wipe is completed 45mm. Waterproof crack resistant mortar. The waterproof and anti-cracking mortar shall be full-brushed with no net-exposed phenomenon. The laps of the galvanized steel wire mesh must meet the requirements of the construction, and the plastic expansion anchor bolt must be securely anchored.
6. Treatment of the interface between the heat preservation part and the non-heat insulation part 6.1 Treatment of the door and window openings: When the construction unit installs the windows and doors for installation, it is easy to break the waterproof and crack resistant mortar layer on the hitting of the uneven parts. Therefore, it is necessary to strengthen the construction. For the control of the plastering quality on the sides of the door and window openings, window coverings, and protruding structural components, the application of the water-resisting and anti-cracking mortar here should be regular and straight, and it is not allowed to be destroyed after completion.
6.2 Insulation parts and non-insulated parts (edges of non-insulated balconies, baffles, balcony floors, awnings, bulges protruding from the outer wall, etc.) Treatment at the boundary of the same plane The parts generally use cement mortar to find thickness and hang net anchorage treatment. Because of the different materials at the junction with the insulation parts, in addition to the respective provisions for the respective net reinforcement and lap joint according to the provisions, an additional galvanized steel wire mesh shall be added and an additional plating shall be provided. The width of the zinc wire mesh is generally 60 cm, and the overlap width on each side of the junction is 30 cm, and it is anchored with a plastic expansion anchor.
7. Other construction requirements in the external wall insulation system 7.1 To increase the impact resistance of the first layer of the first layer of the building wall, a layer of nets shall be added to the wall of the first layer of the building, and metal corners shall be added at the first floor of the corner. Height 2000mm from the ground level outside the ground, located between the two hanging nets.
7.2 When the exterior wall facing layer is different, the facing brick and the coating joint structure, alkali-resistant mesh pressure hot-dip galvanized steel mesh is not less than 300mm, the tile shall not be attached to the alkali-resistant mesh cloth.
The quality control of the external wall insulation system construction process is the guarantee for the construction quality and safety of the external wall insulation system. In particular, the key points of control of the above-mentioned items are the key to the quality control of the cuts, and the key-shear middle and heavy-touch control. letter
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