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The exterior wall construction must know the steps

date: 2016-06-18 20:39:22

Outdoor paint construction can not paint when the interior is simple, outdoors, if you want to perform dozens story building exterior paint, there should be special treatment, and that process is also more dangerous. Thus, outdoors paint painting series of steps, they must have a detailed preparations and arrangements for storage of paint work, otherwise, would be very time delay, it is also threatened workers safe. Therefore, the construction step exterior coatings must be detailed to the most refined place.

Construction preparation

(1) Structural engineering acceptance by the relevant departments.

(2) the use of outer wall plastering hanging baskets, security facilities is completed, watch the basket away from the wall 200 ~ 250mm.

(3) the wall surface of dust, grease and other dirt cleaned, and sprinkler moist. Aerated concrete wall before watering wet plaster one day, (depending on weather conditions on-site control).

(4) concrete wall surface of the protruding portion tick level; cellular, Ma surface, stretch their legs and other part into practice after culling, with 1: 2.5 cement mortar layered fill level, the exposed steel head and lead wire top removed, scaffold eye caulking holes and other tight; cellular, recessed depression, missing edge off corners, smooth to be filled

(5) the pipe must pass through the hole in the wall mounting sleeve promptly before plastering, and washed with 1: 3 cement mortar or concrete caulking pisolite dense ,, plaster surface then Cha Junpei.

(6) before plastering, checking windows and doors in the correct position, is firmly connected to the wall. Gap junctions with 1: 3 cement mortar dense layered impaction, if the gap is too large, a small amount of hemp in the mortar.

(7) plaster before the test substrate surface smoothness, and both sides of the horn, the pop-up on both sides of the Line of Control balcony plaster layer, as a basis for rendering.

(8) plastering mortar rigorously metering and mixing, the mixing ratio and the like consistency has been checked before use. Cement mortar must be used before the initial setting is completed.

(9) must be done in accordance with regulatory requirements prior to use cement retest, if the date of manufacture more than three months, you should review the test, according to test results to use. Substandard products firm exit, prohibited the use of waste cement.


Material requirements

Cement: No. PO32.5 using ordinary portland cement, should be pre-qualified certificate and retest orders.

Sand: sand, the average particle diameter of 0.35 ~ 0.5mm, 5mm aperture sieve should be over before use. Not contain debris. 1,3 material preparation

1) preparation of mortar interface: The interface mortar: water = 5: 3 (mass ratio) (as the case may be appropriate to adjust the amount of water). With mortar mixer or an electric mixer. By adding 5 parts of the interface mortar, then add 3 parts of water was stirred for 3 - 5 minutes, into a uniform paste can be used.

2) the preparation of powder particles of polystyrene insulation slurry: the use of more than 300L mortar mixer or in a blender to meet the slurry volume does not exceed 70% of the mixer volume mixer. After the first 35--40kg water into the mixer inside (the amount of water to meet the workability date), then poured into a bag (30kg) Powder and stirred for 5 minutes, then poured into a bag (200L) continue stirring until homogeneous polystyrene particles (more than 3 minutes). The slurry should be stirred with with the use and used within 4 hours.

3) the preparation of mortar cracking: cracking mortar: water = 5: 3 (mass ratio) (as the case may be appropriate, the volume of water). With mortar mixer or an electric mixer. By adding 5 parts of cracking mortar, then add 3 parts of water and stir for 3-5 minutes, into a uniform paste can be used, and should be used within 2 hours after a good preparation.

4) preparation of a flexible putty: flexible putty adhesive: white portland cement = 1: 0.4 (mass ratio), mix well with an electric mixer can be used, should be used within two hours.


Construction procedure:

(1) Primary wall treatment

1. The impact of the elimination of the floor construction materials primary wall surface from dust, grease, release agents, hollowing and weathered like. Floor surface projections should be greater than or equal lOmm removed, apply mortar crack repair.

2. Wall brush interface mortar.

(2) the external walls of powder particles of polystyrene

1. The powder particles of polystyrene insulation layer construction of at least two passes, the first over the construction of the thickness should be about 10mm, the last time construction thickness should be controlled at lOmm about twice each construction interval should be more than 24h. Construction temperature is low, the interval may be extended.

2. The powder particles of polystyrene insulation layer construction should be from top to bottom.

3. The last time powder polystyrene particles of construction should reach paste cake, red bars of thickness, with a large bar and rub flat, so that the wall flatness door window to meet the requirements.

4. The insulation layer is cured and dried (general 5d), can be carried out under a process of construction.

(3) wiping cracking mortar pressed into resistant mesh

1. The 3-4mm thick cracking mortar evenly wipe the surface of the insulation layer, immediately cut a good alkali mesh with the trowel pressed into the cracking mortar, mesh overlap between not less than 50mm and shall not make the mesh folds, hollowing, Alice.

2. Paving should first floor double-resistant mesh, the first layer of paving strengthening resistant mesh to strengthen resistant mesh then respond, followed by a second layer of ordinary resistant mesh paving, two resistance cracking mortar between the base mesh must be full.

3. located in the first floor walls Yang corner 2m high special metal security angle, angle should be sandwiched between the first floor resistant mesh. Yang corner on both sides of the remaining floors resistant mesh-way around the corner from each other lap, lap width of each side not less than 200mm.

4. corners of window and door openings should be 45 to advance along the direction of additional growth posted 300mmX400mm resistant mesh.

(4) Mesh laying:

1. resistant mesh laying methods:

Stainless steel trowel, evenly coated in polystyrene board surface area slightly larger than a mesh layer of plaster mortar, a thickness of about 1.6mm. Immediately mesh cloth pressed into the wet plaster mortar, mortar until slightly dry and hard to touch when you can, and then immediately apply the second track Plastering mortar with the trowel until the mesh buried in the two middle front Mortar , the thickness is usually completed after 3 ~ 5mm.

2. Should the external walls from top to bottom along the circle around laying mesh.

3. When confronted with door and window openings, should subsidize a standard mesh along the direction of 45 degrees in the hole at the corners to prevent cracking.

4. When laying mesh, mesh curved surface should face the wall and smooth with a trowel from the center to the edges until the mesh is completely embedded in the plaster mortar, without any discernable visual grid cloth lines.

5. Standard network Plastering mortar thickness of 3 ~ 5mm.

6. All Plastering mortar and mesh after laying is completed, stand at least 24 hours curing before proceeding to the next step of a construction. In the cold and wet weather conditions, but also appropriate to extend the curing time.

7. The completed part from the infiltration of rain and erosion.

Elastic brush primer: After cracking mortar construction 2h brush resilient primer layer is formed on the surface of waterproof and breathable.

Scraping flexible putty: After cracking mortar flexible putty layer substantially dry scrape, scrape general twice to make it flat and smooth surface.

Construction finishes: paint drying putty after brushing or spraying.