Before the construction of indoor and outdoor plastering works, the supervisor, together with the owner, design institute, quality inspection station in Dongxihu District, contractor and other relevant personnel, shall conduct a comprehensive inspection and acceptance of the grassroots walls, cast-in-place concrete beams, plates, columns (including constructional columns), walls, stairs, balconies, etc. within the scope of the main structure before the decoration works can be carried out. At the same time, the contractor should seriously deal with related issues and must do well:

1. Install the aluminum alloy window frame, and finally fix the installation position of the window. Before the window frame is installed, a long vertical control line should be popped up from top to bottom on both sides of the hole, and a horizontal line should be popped up from top to bottom on the hole (the hole with the same elevation) to avoid the skew and dislocation of the window, the window frame coming in and out, and the inconsistency from top to bottom. If the error exceeds the standard requirements, it should be renovated in advance.

2. The model, specification and performance of hardware shall comply with the relevant provisions of current national standards. The thickness of the window frame fixing piece should be greater than or equal to 15mm, and its material should be Q235-A cold-rolled steel plate with galvanized surface.

3, the gap between the window frame and the wall should be layered embedded dense. The filling material shall meet the requirements of JGJ 103-96 Code for Installation and Acceptance of Plastic Doors and Windows. The foaming agent should be lower than the outside of the window frame 1- 1.5cm. If there is any protrusion, it must be scraped off with a blade to meet the depth requirement of 1- 1.5cm, and then brush 65438 at the humanly scaled opening. As the main working procedure, window frame caulking should be handled by special personnel, and the working procedure can only be carried out after the plastic steel window frame is fully inspected and accepted by the supervisor.

Second, the plaster quality requirements:

1. Exterior wall plastering (including bedroom, living room, kitchen and bathroom, stairwell, etc.). ) for cement mixed mortar, cement mortar, brick, the specific proportion and thickness (including exterior wall decorative line and frame reinforcement) should meet the design requirements.

2. In order to create excellence, organize construction according to medium and advanced plastering standards. For quality requirements, see Article 2 of JGJG73-9 1 Code for Construction and Acceptance of Building Decoration Engineering. 3? .2, Article 2? .5.？ 3―2? .5? .5 and the relevant provisions in the national standard "Standard for Quality Inspection and Evaluation of Construction and Installation Engineering".

3. The paint layer of the window shall not cover the external lines of the window frame. If it is called "eating a frame", a concave seam with a width of 3-5 mm and a depth of 2-3-5 mm should be left on both sides of the window frame and filled with sealant: the window sill should be painted and the lower frame should be left with an arc groove of 10- 15 mm and filled with sealant. The inner side of the window sill should be higher than the outer side, there should be a running slope above the outer window sill, and a drip line or drip tank should be made below. See figure 2 on page 6 of JGJ 73-9 1 Code for Construction and Acceptance of Building Decoration Engineering for details. 1? . 13。

4, eye-catching parts outside the window need to be drip tanks, which are not less than 20mm away from the exterior wall surface.

5. When plastering balconies, awnings, coping, protruding lines and other parts, water-retaining slopes and drip tanks should be well prepared.

Third, the quality control points:

1. Strictly control the quality of raw materials-the cement should be no less than No.325 slag cement or ordinary cement, and the same batch of products should be selected to make the appearance color consistent. The sand is medium sand (the outer wall is medium coarse sand, and the fineness modulus is required to be above 2.6). Before use, it should be sieved (the mesh is 5mm), the silt content is not more than 3%, and it must not contain sundries; Lime plaster is made of massive quicklime, and its curing time shall not be less than 15d. Dehydrated and hardened lime putty is strictly prohibited. If ground lime powder is used, it should be poured into the pool more than 3 days before use, and 2-3 times of water should be added to turn it into plaster. The cement and sand used must be sampled and retested, and can only be used in the project after meeting the requirements. If it is necessary to add additives into plastering mortar, it must be submitted for approval and shall not be handled without authorization.

2, serious processing at the grass-roots level is one of the keys to ensure the quality of plaster, must be done in a down-to-earth manner:

(1) Remove the residual dirt and oil stain of concrete or mortar on the surface of concrete and brick wall base, wood board (wood wire or sawdust), tape paper, iron wire and steel bar head. Generally, the oil stain isolation agent can be washed with caustic soda water with a concentration of 5- 10% first, and then washed with clear water. The obvious concave and convex parts on the base surface should be leveled in advance. For honeycomb, empty drum and corner-missing parts, first brush 1: 4 = 107 glue: water glue solution, and then fill it with 1: 3 cement mortar. After cleaning at the grass-roots level, at room temperature, water the wall the day before plastering, and the water seepage depth of the brick surface is about 5-8 mm; The concrete surface can be watered less. Concrete surface (including concrete columns, walls, ceilings, beams and slabs, and the bottom surface of stairs, etc.). ) It should be rough. For the glossy surface, it is suggested to chisel, or brush 1: 3- 1: 4 plain cement slurry (mixed with 3-5% 107 glue) first, or to throw, spray or brush the slurry. Or use 1: 2.5- 1: 3 cement mortar or 1: 0.5: 1 mixed mortar to mix with 1: 4 latex water, the thickness shall not exceed 3mm, smooth and brush for 24 hours, and then plaster until the bottom layer turns white. If plywood (larger size) is used,

(2? )? The hole in the wall should be tightly blocked. Wall holes through which water supply and drainage and electrical embedded pipes pass and pipe grooves with carved walls must be embedded tightly. Especially at the back of the pipeline, responsible personnel should be sent to operate carefully, and the above processes should be concealed under the witness of supervisors. The back of the pipeline can be plastered, or it can be roughened once before the secondary piping.

(3? )? At the junction of non-load-bearing brick wall base and concrete base (including the junction of roof brick wall and concrete ring beam), the surface plastering should be nailed with metal mesh according to the drawing and fastened firmly. The lap width of the metal mesh and each base should not be less than100 mm.

(4? )? The hole in the outer wall is blocked. The hole close to the outer wall 1/2 hole depth shall be compacted with fine stone concrete and accepted by the supervisor.

3、? Correctly control the mixture ratio and workability of mortar.

Mortar consistency under general control:

The bottom plastering mortar is10-12cm.

The middle plastering mortar is 7-8 cm.

The surface plastering mortar is 10cm.

In order to ensure that the mortar is firmly bonded to the base (especially the concrete base), a proper amount of latex and 107 glue can be added to the mortar to increase the bonding strength; Or spray (brush) an interface treatment agent to strengthen the bonding between cement mortar and base, and solve the common problems such as hollowing and cracking of plastering layer.