(a), the construction technology
1, metope must be cleaned and washed, check the verticality, flatness, deviation is not more than 5mm, application of bonding mortar processing.
2. According to the temperature situation, the mixture ratio of bonding mortar should be adjusted as it is used. When mixing, pay attention to mixing evenly, and the cement slurry prepared each time should not be too much. Depending on the different temperature environment, the cement slurry should be used up within 1-2H.
When the temperature is above 30℃, it is not appropriate to paste the insulation board.
3. According to the design requirements, the horizontal line, expansion joint line and expansion joint width line 20mm away from the aproll elevation will pop up on the wall. After the vertical wall is hung vertically with a vertical line, it is nailed firmly with cement, and the nail cap is the outer surface line of EPS, and then tightened with 20# iron wire to control the verticality and flatness of EPS board.
4. The 4.EPS board is cut by heating wire, the standard board size is selected according to the position requirements, and the standard board is processed according to the actual size.
5, insulation board paste appropriate uses point bonding. Apply mucilage along the back of insulation column with a spatula. When non-standard boards are used, the floating point of bonding mortar should be no less than 4 points, and the ratio of the area of insulation board to the floating area of mortar should meet the requirements.
6. When mucilage is stuck on the insulation board, the side should be kept clean, and mucilage should not be stuck. Put it back immediately after wiping the mucilage.
7, insulation board from bottom to top, along the horizontal transverse shop is stuck, paste should be gentle, uniform extrusion, plate seam should be closely flush. Each board shall be staggered by 1/2 board length. At the corner, the insulation boards should be staggered and connected, and the verticality of the corner should be ensured.
8. The insulation boards at the four corners of plastic-steel window openings shall be cut and formed by standard plates, and shall not be spliced. The distance between the four corners of the seam and the opening should be greater than or equal to 200mm.
9. When installing the fasteners, drill holes on the pasted insulation board with an impact drill, and the holes should be not less than 30mm deep into the wall. Fix the insulation board on the wall with special nails and gaskets, and the nail head should be flush with the insulation board.
10, within 3 days after the insulation board is pasted, the uneven joints of the board shall be treated and the board surface shall be cleaned.
1 1, the insulation board shall be plastered with mucilage from top to bottom, horizontally and vertically along the corner of the external wall. The first plastering thickness is 1.5- 1.8, and the first plastering height is 50mm wider than the standard grid cloth or steel grid cloth. After plastering, mesh cloth should be laid and mucilage should be pressed out. According to this method until the whole wall is completed, the second plastering (surface layer) should also be carried out horizontally from top to bottom, with a thickness of 1mm- 1.2mm and a smooth surface.
12, grid cloth should be laid from top to bottom, along the corner of the external wall in turn. When meeting the hole of plastic-steel window, it should be pasted at the four corners of the hole, and the standard grid cloth laid on the bedding face should be turned into 65mm wide along the window angle.
13, the lap width of standard grid cloth should be greater than or equal to 80mm, steel grid cloth should not lap and turn, and the cloth edges should be connected. Standard grid cloth should be continuously laid to the corner, and the width should be greater than or equal to 20 mm
14, the height of the first floor from the outdoor ground is 2m, or within the height range of the first floor of ceramic tile, steel grid cloth should be added.
15. After laying and plastering the grid cloth, the grid cloth should be completely buried in the mortar, and the construction of the next working procedure can only be carried out after 3-4 days of curing.
16, expansion joints are arranged according to the design requirements.
17, the frame joints are divided according to the design requirements, and a splayed groove is formed by an electric heating wire grooving machine.
18. Decorative pieces should be pasted on the insulation board to pop up the specific position with chalk line according to the design requirements, pasted on the design position with bonding mortar, covered with standard grid cloth, with an overlapping length of 80mm, and then leveled with plastering mortar.
19. After all the above work is completed, it can only be carried out after inspection meets the requirements, and external finishing work can be carried out.
Schematic diagram of external wall insulation
(2), material inspection and engineering quality inspection and acceptance
1. Before construction, try to match bonding mortar at least once and check its technology.
2. Standard grid cloth; The reinforced grid cloth must not be damaged, broken or unevenly coated. , and the same batch of standards entering the site should be sampled at least once.
3.EPS insulation board shall be inspected once every 20m3, and each sampling shall be no less than 10. The allowable deviation in the length direction, width direction and thickness direction is not more than 65438 0.6mm, the flatness of the board surface is not more than 0.8mm, and the diagonal deviation is not more than 2mm.
4. The total bonding area between each board and the wall; According to the floor every 20m long spot check, but not less than 3; Each inspection shall not be less than 2 pieces; It is required that the first layer and the top layer should not be less than 40% (the diameter of the bonding point should not be less than 150mm) and other layers should not be less than 35% (the diameter of the bonding point should not be less than 120mm).
5.EPS board must be firmly bonded to the wall without looseness or virtual adhesion. According to the floor every 20m (every 3m), not less than three places, hand push, hand pull, break inspection.
6. There shall be no less than 0-3 permanent fixed nails per square meter, and the embedded depth in the wall shall be no less than 30mm. The number of permanent fixed nails shall be no less than 3, and each board shall be no less than 2 pieces.
7, EPS board after the installation, the surface level off is not more than 3 mm; The verticality of each layer is not more than 5mm, and the overall height is not more than 20mm；; The vertical angle of yin and yang is not more than 4 mm; Yin and Yang Angle founder is not more than 4 mm; The joint height difference is not more than1.5mm.
8. When laying a layer of standard grid cloth, the thickness of plastering mortar should be greater than or equal to 2.5mm, and the thickness of laying a layer of standard grid cloth and a layer of reinforcing net should be greater than or equal to 3nn. According to the floor every 20m long sampling, but not less than 3 times.
9, standard grid cloth and reinforced cloth in laying, lap, seam of each part, can not have empty drum, buckling, warping, exposure, and paste, lap, package width meets the requirements, according to the floor every 20m long spot check (every 3m), not less than 3.
10. Apply for inspection in time for the items that need to be concealed and accepted, and inspect the concealed parts together with the supervisor and Party A. After the test report and certificate of the materials used meet the requirements, sign in time for confirmation.
1 1, carefully collect and sort out all relevant information, and strive for completeness. If the self-inspection does not meet the requirements, it must be handled.
12, adhere to the model to lead the way, before large-scale paving, do the model wall first, and after the relevant units check that it meets the requirements, large-scale paving is allowed.
13. For the wall and tile below 2m in the first floor, grid cloth should be strengthened at joints, expansion joints and yin and yang corners. See the construction technical disclosure for the standard grid cloth of Yin and Yang angles.
14. Full-time quality inspectors shall be set up to comprehensively track the construction tasks every day and handle the problems in time when found.
Example of anchor diagram
Hanging blue scaffold construction
In order to save the floor space and speed up the overall construction progress, this project adopts hanger construction.
Hanger construction needs to enter the finished hanger in advance, and find a fixed position on the roof with steel wire rope.
Hanging basket should adopt finished hanger, and pay attention to whether the wall thickness of steel pipe is greater than 5mm, and it must be a national standard lattice steel pipe. The upper steel bars are connected with φ 14 steel bars, and the steel bars and steel pipes are fully welded with J4.0 covered electrode, and no missing welding is allowed. The springboard at the bottom is made of hard steel plate. There should be no bending deformation.
The steel wire rope of hanger adopts finished steel wire rope, and the quality and practice are three strands of φ 10 steel wire rope. Must have a factory certificate.
The portable crane is a finished portable crane. The tool must have limited equipment, and must have the factory certificate and test report.
The anchor claw is made of copper and finished products, and the factory certificate and test report are required.
The hanger style is shown in the attached drawing.
Before construction, load test must be carried out on the hanging basket, and the bearing capacity needs to be greater than 300Kg. The test method is to make φ 48 frame pipe into diagonal support type and put it on the roof, and press a sandbag larger than 400 Kg at the end as counterweight. Then put down the wire rope and connect it with the hanger, pass through chain block and tighten it. Then slowly shake the chain block with a pressure bar, the height is off the ground 1.5 meters, and four to five people standing on it carry out load tests at the same time. After ensuring stability, the next process will start to work upwards.
During the construction period, full-time security officers and full-time scaffolders are required to take care of them, and frequent inspections are required. If burrs are found in some parts of the wire rope, pay attention to whether the anchors and other fixtures are stuck. If there is looseness, immediately notify the site construction personnel to immediately take off the frame, stop the construction and carry out rectification. After rectification, the construction can continue.