The Process Flow And Construction Control Points Of Alkali-resistant Fiberglass Mesh Splicing!

De-slurrying of the base layer → making ash cake and drilling → leveling the mortar in separate lanes (pressing in fiberglass mesh during the second plastering) → inspection and acceptance

2. Key points of construction control

1. First, dig out the location of the structural expansion mold. After chiseling, rinse it with water and repair it flat before plastering. When plastering, it is strictly forbidden to have large or small spots on the edges of doors, windows, etc.

2. Remove dust, dirt, oil, etc. from the surface of the base layer, seal the scaffolding holes and overhanging channel steel with expanded fine stone concrete; fill bolt holes (filling with foaming agent) and other parts; and sprinkle water to moisten them. All pipes, wire boxes, electrical boxes, etc. must be installed before plastering. It is strictly prohibited to plaster first and then install to avoid color difference caused by plastering.

3. The thickness of the base layer should be 3mm and there should be no leakage. If there is leakage, it should be repaired in time.

4. Paste the gray cakes first up and then down; generally the distance between the gray cakes and the ground should not be greater than 300mm. The gray cake should be made into a 50mm square shape using 1:3 cement mortar. Use a ruler to determine verticality and horizontality. After the corner gray cakes are slightly dry, hang threads on the surface of the upper, lower, left and right gray cakes, and make standard gray cakes every 1.5m along the lines. When the ash cake is about to dry, apply 100mm wide mortar reinforcing ribs between the ash cakes, with a thickness level with the ash cake.

5. The overlapping method should be used for splicing alkali-resistant glass fiber mesh, and the overlapping length should not be less than 100mm; steel wire mesh (19#, 12×12 steel wire mesh, 300mm wide) should be hung at the junction of different wall materials as Reinforcement layer. The overlap width of the steel mesh and each matrix should not be less than 150mm. Where alkali-resistant fiberglass mesh is pasted on the inner and outer corners of the wall and door and window openings, anti-crack mortar should be partially paved first, and then anti-crack mortar should be applied to a large area.

6. The thickness of plastering should be controlled within 20mm. The thickness of one plaster should not be greater than 15mm. Plastering should be done in layers. When the total thickness of plastering is greater than or equal to 35mm, reinforcement measures should be taken. When applying primer, smooth the surface with a soft scraper and smooth it with a wooden trowel. When using dry mortar, the thickness of each plastering mortar should be 5 to 10 mm. When using ready-mixed mortar or on-site mixing mortar, the thickness of each plastering for cement mortar should be 5 to 7 mm, and the thickness for each plastering of cement mixed mortar should be 7 to 9 mm, and should be constructed after plastering. The previous layer of mortar finally solidified. A layer of mortar. For thicker plastered parts, a reinforcing layer should be made every 30mm and a reinforcing mesh should be added.

7. Except for the facing part of the blocks, all outer corners of the wall are equipped with 1:2 cement mortar corner guards. The height of the corner guards is 800 cm and the width of each side is not less than 60 cm.

3. Structural requirements

1. The infill walls of stairwells and pedestrian passages should be reinforced with steel mesh mortar surfaces. The thickness of the mortar surface layer is 20mm. The mesh size of the wire mesh should not be larger than the size of the wire mesh. The diameter of the steel wire should not be less than 1.2mm. Hot dip galvanizing should be used.

2. Steel wire mesh should be added at the joints between the infill wall and the concrete components, the grooved parts of the wall, and both sides of the temporary construction opening to resist cracks in the wall. Steel mesh should also be installed at corners where stress is concentrated, such as door and window openings. net. The specifications of the steel wire mesh are the same as above. The steel wire mesh should be fixed with steel nails or iron nails and iron sheets every 200mm to 300mm. The hanging net should be flat and firm. After the bottom layer of plastering is completed, the entire wall should be covered with alkali-resistant fiberglass mesh cloth, and then the surface layer should be plastered. The thickness of surface plastering should be controlled between 7 and 9mm. It must be compacted and smoothed.

3. When plastering and closing the window, cement mortar is generally used to press the window frame 5mm outside the window; after the plastering of the window edge is completed, it must be ensured that about 10-12mm of the window frame is exposed on the finished surface; the window should be sealed with cement mortar. , making sure the lines are straight and the edges are neat.

4. The outer corners of interior walls, columns, and door openings should meet the design requirements; if there are no design requirements, the corner protection should be made of cement mortar no less than M20, the height of the corner protection should be no less than 2m, and the width of each side should be no less than 50mm.

5. Drip lines (troughs) should be set up in areas with drainage requirements. The drip line (trough) should be neat and straight. The drip line should be high on the inside and low on the outside. The width and depth of the drip line should meet the design requirements and should not be less than 10mm.

6. Indoor door flat opening (including indoor door, tube well door): the width of the opening is 8 (that is, the opening on both sides is 1 cm), the height is 9 (that is, the opening on the upper side is 1 cm)); the closing size of the door and window opening is Standard dimensions specified on drawings. Closing sizes are as follows. After the window is installed, the plastering and closing of the inner window should be carried out at the same time as the plastering of the inner wall. The plastering on the inside of the window should be flush with the window sill. Exterior walls shall not be re-sealed. The blinds are plastered and closed by 1cm on each side, and the upper and lower layers are straight.

4. Interior wall practices

4.1 Interior wall plastering: used for entrances, cloakrooms, living rooms, Chinese restaurants, Western restaurants, suite walkways, master bedrooms, secondary bedrooms, children's rooms, elderly rooms, study rooms, suite storage rooms, and enclosed balconies (non-waterproof requirements).

1. 15mm thick M15 cement mortar plastering (using aluminum film technology with a thickness of 10mm);

2. 20 thick vitrified microbead thermal insulation mortar;

3. Hang steel wire mesh at the interface between different wall materials (19#, 12×12 steel wire mesh, 300mm wide);

4. For base walls, shake off the grout.

4.2 Cement mortar interior wall (1): used in kitchen

1. 15mm thick M15 cement mortar roughening (suitable for ceramic tiles and finely decorated apartments);

2. Hang steel wire mesh at the interface between different wall materials (19#, 12×12 steel wire mesh, 300mm wide);

3. For base walls, shake off the grout.

4.3 Cement mortar interior wall (2): used in bathrooms, supporting bathrooms, and public toilets.

1. 1.2 thick JS waterproof coating;

2. 15mm thick M15 cement mortar mixed with waterproofing agent and roughened;

3. Hang steel wire mesh (300mm wide) at the interface between different wall materials;

4. For base walls, shake off the grout.

4.4 Brick interior walls: lobby, elevator front room, inner corridor (excluding talent apartments)

1. Use 5-thick building bonding cement mortar and supporting special adhesive to paste the interior wall tiles (stone surface layer), and wipe the joints with white cement;

2. 9mm thick M15 cement mortar rolling/brushing fiberglass mesh cloth (suitable for local modification of masonry walls and concrete walls);

3. The partition wall between the non-heated room and the heated room needs to be built with 20-thick vitrified microbead insulation mortar on the side of the non-heated room (the second step in this area is cancelled);

4. Hang steel wire mesh (300mm wide) at the intersection between different wall materials, and use plain cement mortar to hang steel wire mesh on the entire masonry wall;

5. For base walls, shake off the grout.

4.5-sided brick interior wall: household wall

1. 15mm thick M15 cement mortar plastering (using aluminum film technology with a thickness of 10mm);

2. Make 15-thick vitrified microbead thermal insulation mortar on both sides of the household wall;

3. Hang steel wire mesh at the interface between different wall materials (19#, 12×12 steel wire mesh, 300mm wide);

4. For base walls, shake off the grout.

4.6 Interior wall putty (1): stairwells, pipe wells, equipment rooms, water wells, electric wells, etc., except for finely decorated areas.

1. Two layers of ordinary putty for leveling;

2. 15mm thick M15 cement mortar leveling protective layer, lined with alkali-resistant fiberglass mesh;

3. Add 19#, 12×12 steel wire mesh at the joint between the infill wall and the concrete structure, and overlap it with the surrounding walls by 150 meters (the stairwell needs to be added);

4. For base walls, shake off the grout.

4.7 Putty inner wall (2): inner wall of tube well, inner wall of stairwell (partition wall between heating room and non-heating room)

1. Apply putty twice;

2. Press the 5-thick anti-crack mortar into the alkali-resistant glass fiber mesh;

3. The partition wall between the non-heating room and the heating room needs to be built with 20-thick vitrified microbead insulation mortar on the side of the non-heating room;

4. Autoclaved aerated concrete block wall/reinforced concrete wall.

4.8 Inner wall of cement mortar: inner wall of air shaft

Masonry wall:

1. 15mm thick M15 cement mortar shall be smoothed during construction;

2. Clean the base of the wall;

a:

1. The inner wall of the air shaft lined with galvanized iron sheet must not be plastered;

2. The reinforced concrete wall of the air shaft should be cleaned and the bolt holes should be sealed tightly to prevent air leakage.

4.9 Interior wall putty: water tank room, elevator room

1. Apply water-resistant putty twice;

2. Use 15mm thick M15 cement mortar for leveling;

3. Autoclaved aerated concrete block walls, reinforced concrete walls, and slurry rejection.

4.10 Cement mortar wall: commercial and supporting buildings except public toilets

1. Use 15mm thick M15 cement mortar for leveling;

2. Hang steel wire mesh at the interface between different wall materials (19#, 12×12 steel wire mesh, 300mm wide);

3. For base walls, shake off the grout.

4.11 Mineral wool (calcium silicate board) sound-absorbing panel wall: rooms with sound insulation and noise reduction requirements (rooms connected with living functions)

Concrete and Block Walls:

1. 12mm thick perforated mineral wool sound-absorbing board (calcium silicate board), fixed on the keel with screws, and finished metal decorative strips installed at the seams of the boards;

2. A layer of glass cloth is tightly fixed on the surface of the keel;

3. 40-thick rock wool felt (or glass wool felt), pasted on the keel frame with construction glue;

4. The 75×50×0.7 light steel keel is fixed on the wall with expansion bolts, and the middle distance is designed according to the calcium silicate board module (600 or 1200)

5. Concrete wall (brick foundation wall, slurry).

5. Acceptance standards

1. Before plastering, dust, dirt, oil stains, etc. should be removed from the wall surface, and then moistened with water.

2. Plastering work should be carried out in layers. When the total thickness of plastering is greater than or equal to 35mm, reinforcement measures should be taken. For plastering where substrates of different materials meet, reinforcement measures should be taken to prevent cracking. When a reinforced mesh is used, the overlap width between the reinforced mesh and each base material should not be less than 150mm.

3. The plastered surface should be smooth and clean, with smooth joints, no scratches, uniform color, clear and beautiful appearance.

4. The plastering surface around corner holes, troughs, and wire ducts should be neat and smooth. The plastered surface behind the pipe should be smooth.

5. The bond between the plaster layer, the base layer and the plaster layer should be firm. The plaster layer should not have delamination, hollowing, etc.

6. Quality assurance measures

6.1 Quality assurance measures

1. Samples of the materials selected for this project must be provided and submitted to the owner and supervisor for approval before bulk ordering can be made. All materials provided by professional companies must be submitted to the project chief engineer for inspection and approval before entering the site.

2. After the plastering is completed, the general contractor and supervision unit should inspect the hollows and cracks after 20 days, and make regular rectifications to the unqualified parts;

3. Hollow parts must be cut into square shapes with a cutting machine. Do not plaster immediately after dismantling. Special personnel must be arranged to inspect the surrounding areas of the dismantled parts to avoid secondary hollowing due to insufficient dismantling, and then plaster repairs must be carried out.

4. If there are many holes and cracks in a single wall, the wall needs to be repaired as a whole; the base layer of the hollow must be cleaned, and plastered in layers after grouting. Repairs should be done squarely and attention should be paid to post-maintenance. Plastering on the surface is strictly prohibited. Use materials such as polymer mortar for bulk embedding.

5. The damaged part of the plastered sun corner should be cut off 50mm on both sides of the right angle, and then re-plastered and repaired. Broken corners must not be repaired directly.

6. After the materials are selected, prototype work is carried out, and then large-scale construction of the sub-project is carried out. Large-scale construction must be approved in writing by the owner and supervisor before proceeding.

6.2 Quality standards

General plastering allowable deviations and inspection methods (-2018)

thing

project

Allowable deviation (mm)

Test Methods

Ordinary plastering

Advanced plastering

verticality of facade

2m vertical detection ruler

Surface roughness

2m ruler and feeler gauge

The yin and yang angles are both square

200mm right angle detection ruler

Divider (Seam) Straightness

The cable must be 5m long. If the cable is less than 5m, the cable must pass. Check with a steel ruler.

Straightness of dado and leg tops

The cable must be 5m long. If the cable is less than 5m, the cable must pass. Check with a steel ruler.

Note: 1. For ordinary plastering, the squareness of the inner angle in item 3 of this table does not need to be checked;

2. When plastering the ceiling, the surface smoothness of item 2 of this table does not need to be checked, but it should be smooth.

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