The waterproof construction technology and control points of the kitchen and toilet are applicable to the construction of polyurethane coating waterproof material for the kitchen, bathroom and bathroom floor of civil buildings.
First, construction preparation
(1) Working conditions
1. The floor cushion of the kitchen and toilet room has been completed. All the risers and casings that pass through the floor and floor of the kitchen and toilet have been completed and have been firmly fixed and accepted. The gap around the pipe is packed with 1:2:4 pea stone concrete (the bottom of the floor is required to hang the formwork).
2. The leveling level of the kitchen and toilet floor has been completed, the elevation is in line with the requirements, and the surface should be smoothed and solid. Flat, no defects such as hollow drums, cracks, sanding, etc., moisture content is not more than 9%.
3. The level of flooding of the screed should be 2% (ie 1:50). No water should be accumulated locally. The intersection with the wall and the corner and the root of the pipe should be evenly and smoothly smoothed to a radius of 100mm. Small rounded corners, use a special trowel. Any 5% (1:20) slope should be applied to the root of the wall to avoid water accumulation.
4. Brush the surface of the base layer of the waterproof layer, clean the dust and debris, and leave the surface of the mortar lumps and the high part should be smoothed and swept. For the parts that are difficult to clean around the tube root, use a brush to remove dust, etc. If there is a pit or unevenness or the yin and yang angles are not smeared into a circular arc, you can use the cement: cement: sand = 1:1.5:2.5 mortar to repair.
5. Before the base layer is made of waterproof coating, it is to highlight the root and floor drain of the ground and wall. Ports that are prone to leakage, such as drains, yin and yang, should be added as additional layers.
6. The wall of the kitchen and toilet room shall be waterproof according to the design requirements and construction regulations (at least 300mm around). The plaster on the base of the wall shall be calendered, requiring smoothness, no defects such as hollow drums, cracks and sanding. The pipe and fixing fixture passing through the waterproof layer shall be installed in advance, and the surface layer shall be recessed by 5 mm within 50 mm from the pipe, and the pipe root shall be formed into a circular arc with a radius of 10 mm.
7. According to the 50cm elevation line on the wall, the wall waterproof height line will be ejected, and the boundary line between the riser and the standard ground will be marked. The paint should be level with this line when painting.
8. Before lighting the kitchen and toilet room, sufficient lighting equipment (safety low-voltage lamps, etc.) and ventilation equipment must be installed.
9. Waterproof materials are generally flammable and toxic materials. Keep them away from fire. Storage, storage and use should be provided with adequate fire-fighting equipment. Construction workers should wear overalls, soft-soled shoes and professional supervision.
10. The ambient temperature is maintained above +5 °C.
11. The operator should be professionally trained, certified to work, first to do the model room, after passing the inspection and acceptance, before full construction.
(2) Material requirements
HB kitchen and bathroom special waterproof coating is a leap in the waterproof coating market. It has the advantages of good weather resistance, water resistance and stability of SBS modified asphalt coil, and it is easy to form into a waterproof membrane. It is ideal. waterproof material. The product is based on petroleum asphalt, modified by high molecular polymer, and high performance, low price thick coating made of plasticizer and filler.
Its performance indicators are as follows:
HB kitchen and toilet special waterproof coating performance technical indicators
Performance
Solid content: % ≥ 43
Low temperature flexibility: °C -10 -15
Heat resistance: °C 80
Impervious: MPa 0.1, 30min impervious
Bond strength: ≥ 0.2
Extensibility: mm No treatment ≥ 5 Heat, violet, alkali ≥ 3.5
Alkali resistance: soaked in Ca(OH)2 saturated solution for 7d at 23±2°C
Acid resistance: soaked in 2% H2SO4 solution for 7d at 23±2°C
Drying time: h ≤ dry 2 dry 10
(3) Tools
Main equipment: electric mixer, mixing crucible, small paint bucket, plastic scraper, small iron scraper, rubber scraper, spring scale, brush, roller brush, small trowel, oil shovel, shovel, etc.
Second, the quality requirements
(1) Main control project
1. Waterproof materials meet the design requirements and current relevant standards.
2. The sealing of the drainage slope, pre-buried pipelines, equipment and fixing bolts meets the design requirements.
3. The floor drain should be the lowest point on the ground, easy to drain, and the system is unblocked.
(2) General items
1. The surrounding nodes of the drainage slope and the floor drain drainage equipment should be tightly sealed without leakage.
2. The sealing material should be made of flexible material, densely packed and firmly bonded.
3. Waterproof coating is even, no cracking, no bubbling.
4. The thickness of the waterproof layer meets the design requirements.
Third, the process
HB kitchen and toilet special waterproof coating construction process:
Base cleaning → detail additional layer construction → first layer coating film → second layer coating film → third layer coating film → first test water → protective layer construction → second test water → engineering quality acceptance
Fourth, the operation process
(1) Grassroots cleaning
Before applying the waterproof layer of the coating film, remove the gray skin on the surface of the base layer with a blade, and clean the dust, sand and other debris with enamel, especially the pipe root, floor drain and drain port should be carefully cleaned. If there is oil, brush it with a wire brush and sandpaper. The surface of the base layer must be flat, and the depression should be filled with cement putty.
(2) Detailing additional layer construction
1. Stir well after opening the drum. Do not dilute the product with water or other materials.
2. Detail additional layer construction: paint with a paint brush and stir evenly on the weak parts of the tube root, floor drain, yin and yang angle, etc., which are easy to leak, and must not be leaked (the ground and the corner intersection, the film is waterproof and rolled up) 250mm high). After the surface temperature is 4h, the second coating film waterproof coating is applied, and after 24 hours of drying, the large-area coating film waterproof layer can be applied. The thickness of each layer should be 0.6mm.
(3) Coating film waterproof layer construction
The general thickness of HB kitchen and bathroom waterproof coating is 1.1mm, 1.5mm, 2.0mm. According to the design thickness, it can be divided into two or three times for coating film construction.
1. Open the packaging bucket and mix well.
2. The first layer of coating film: evenly spread the blended HB kitchen and bathroom special waterproof coating with plastic or rubber scraper on the surface of the base layer which has been coated with the primer. The thickness is 0.6mm, uniform and smooth. The amount is preferably 0.6-0.8kg/m2. When operating, the wall is first behind the ground and the operation is reversed from the inside to the outside.
3. The second coating film: When the first coating film is cured to a non-sticky hand, the second coating film is waterproofed according to the first material construction method. In order to make the thickness of the coating film uniform, the direction of the coating must be perpendicular to the direction of the first coating, and the amount of coating is slightly less than the first pass, and the thickness is preferably 0.5 mm.
4. The third layer coating film: after the second layer coating film is solidified, the third time is applied according to the above two-time construction method, and the amount of the coating is preferably 0.4 to 0.5 k/m 2 (for example, the design thickness is 1.5 mm). When the above is above, the fourth painting can be performed).
5. Unloading coarse sand bonding layer: In order to protect the waterproof layer, the waterproof layer of the ground can not remove the gravel bonding layer, and the bonding layer can be scoured with 1:1 108 glue or Zhongba cement slurry. After the ground waterproof protective layer is applied Roll the waterproof coating on the waterproof layer of the wall. When it is not cured, remove the 2~3mm sand on the surface to increase its adhesion to the surface layer.
6. Protective layer or finish layer construction
(4) Construction of waterproof layer
The details of the waterproof layer are as follows:
1. Tube root and corner
1—Floor, 2—Leveling layer (the radius of the tube root and the corner is R=10mm, and the root of the wall is 5% slope).
3—Waterproof additional layer (150mm wide, 100mm high wall angle, flat at the root of the pipe) 4—Waterproof layer 5—waterproof protective layer 6—ground surface layer
2, the floor drain details
1—Template 2—Leveling layer (radius with wall radius and root radius R=10mm) 3—Waterproof additional layer (150mm wide, flat at the root of the pipe) 4—Waterproof layer 5—waterproof protective layer 6—ground surface Floor
3, the door details
1—Floor 2—leveling layer (radius at the corner is R=10mm arc) 3—waterproof additional layer (150mm wide, high and ground) 4—waterproof layer (outside wall 250mm) 5—waterproof protective layer 6—ground Surface layer
(5) Acceptance of coating film waterproof layer
According to the construction process of the waterproof coating film, each process is carefully inspected and accepted, and records are made. Only after passing the test can the next process be completed. After the waterproof layer is completed and dried, the quality of the coating film is fully accepted, and the coating is required to be fully coated, the thickness is uniform, the sealing is tight, and the thickness meets the design requirements (slicing inspection). The waterproof layer has no defects such as drumming, cracking, and curling. After the inspection and acceptance, the water storage test can be carried out. (The water surface is 20mm higher than the standard ground). There is no leakage in 24h. Recording can be carried out and the protective layer can be constructed.
(6) Finished product protection
1. During the operation of the waterproof layer of the coating film, the operator should wear flat shoes, wear the pipe fittings and casings on the muscle surface and the wall surface, floor drains, fixed clips, etc., and must not be damaged or displaced. When applying waterproof coating film, do not contaminate wall floors, doors and windows, electrical wire boxes in other parts. Heating pipes, sanitary appliances, etc.
2. After the construction of the waterproof layer of the coating film, it should be strictly protected. There should be a prohibitive sign on the door of the kitchen and toilet. Before the construction of the protective layer, no one should enter or stack debris on it to avoid damage. Waterproof layer.
3. Before the waterproofing construction of the floor drain or drain outlet, protective measures should be taken to prevent the inclusion of debris, ensure that the drainage is smooth, the water storage is qualified, and the floor drain is cleaned.
4. During the construction of the waterproof protective layer, the mortar should not be mixed on the waterproof layer. When the mortar is laid, the shovel should not touch the waterproof layer. It should be finely finished and the waterproof layer should not be damaged.
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