PVC floor construction process and technical requirements
First, the floor test
1. Use temperature hygrometer to detect temperature and humidity. Indoor temperature and surface temperature should be 15 °C, and should not be applied below 5 °C and above 30 °C. The relative air humidity suitable for construction should be between 20% and 75%.
2. The moisture content of the base layer is measured using a moisture content tester, and the moisture content of the base layer should be less than 3%.
3. The strength of the base layer should not be lower than the requirement of concrete strength C-20, otherwise suitable self-leveling should be used to strengthen the strength.
4. The test result with the hardness tester should be that the surface hardness of the base layer is not less than 1.2 MPa.
5. For the construction of PVC floor materials, the unevenness of the base layer should be less than 2 mm in the range of 2 m ruler. Otherwise, the self-leveling should be used for leveling.
Second, the floor pretreatment
1. Use a floor grinding machine of more than 1000 watts with appropriate grinding discs to polish the floor as a whole, remove paint, glue and other residues, raised and loose plots, and empty plots must also be removed.
2. Vacuum the floor with an industrial vacuum cleaner of not less than 2000 watts.
3. For cracks on the floor, stainless steel ribs and polyurethane waterproof adhesive surface can be used to repair quartz sand.
Third, self-leveling construction - base
1. The absorbent base layer, such as concrete and cement mortar screed layer, should be diluted with water in a 1:1 ratio using a multi-purpose interface treatment agent.
2, non-absorbent base layer such as ceramic tile, terrazzo, marble, etc., it is recommended to use a dense interface treatment agent for the base.
3. If the moisture content of the base layer is too high (>3%) and construction is required immediately, the epoxy interface treatment agent may be used for the bottoming treatment, provided that the moisture content of the base layer should not exceed 8%.
4. The interface treatment agent should be evenly applied without obvious effusion. After the surface of the interface treatment agent is air-dried, the next self-leveling construction can be carried out.
Fourth, self-leveling construction - mixing
1. Pour a pack of self-leveling into a mixing tank filled with clean water according to the specified water-cement ratio, and stir while pouring.
2. In order to ensure self-leveling and even mixing, high-power, low-speed electric drills must be used with special mixers for mixing.
3. Stir to a uniform slurry without agglomeration, let it stand for about 3 minutes, and then stir briefly.
4, the amount of water should be strictly in accordance with the water-cement ratio (please refer to the corresponding self-leveling instructions). Too little water will affect mobility. Too much will reduce the strength after curing.
Five, self-leveling construction - laying
1. Pour the self-leveling slurry that has been stirred onto the floor of the construction. It will flow and level the ground. If the design thickness is ≤ mm, it needs to be scraped with a special tooth scraper.
2. The construction personnel should then put on special nail shoes and enter the construction ground. Use a special self-leveling deflation roller to gently roll on the self-leveling surface to release the air mixed in the mixing to avoid the bubble surface and the interface height difference.
3. Please close the site immediately after the completion of the construction. It is forbidden to walk within 5 hours, avoid heavy objects from hitting within 10 hours, and pave the PVC floor after 24 hours.
4. In winter construction, the laying of the floor should be carried out 48-72 hours after self-leveling construction.
5. If the self-leveling is to be finely ground and polished, it should be carried out after the self-leveling cement is completely dried.
Sixth, the paving of the floor - pre-laying and cutting
1. Both the coil and the block should be placed on site for more than 24 hours to restore the material memory and the temperature is consistent with the construction site.
2. Use a special trimmer to cut and clean the burrs of the coil.
3. When the block is laid, the two materials should be tightly attached and there is no seam.
4. When the coil is laid, the overlap of the two materials should be overlapped and cut, generally requiring an overlap of 3 cm. Be careful to keep cutting.
Seven, the pavement of the floor - paste
1. Select the appropriate glue and scraper for PVC flooring.
2. When the coil is laid, fold one end of the coil. First clean the floor and the back of the coil, then scrape the glue on the floor.
3. When the block is laid, please turn the block from the middle to the sides. Also, clean the floor and the back of the floor and glue it.
4. Different adhesives will have different requirements during construction. For details, please refer to the corresponding product manual for construction.
Eight, the pavement of the floor - exhaust, rolling
1. After the floor is pasted, first press the surface of the floor with a cork block to level and squeeze out the air.
2. Then use 50 or 75 kg of steel pressure roller to evenly roll the floor and timely trim the hem at the splicing.
3. The excess glue on the floor surface should be wiped off in time.
4. After 24 hours, perform slotting and welding.
Nine, the paving of the floor - slitting
1. Slotting must be carried out after the glue has completely cured. Use a special slotting device to groove along the seam. For the welding to be firm, the slit should not penetrate the bottom. It is recommended that the groove depth be 2/3 of the thickness of the floor.
2. At the end where the slitter cannot be opened, use a manual slitter to slit at the same depth and width.
3. Before the weld is welded, the dust and debris remaining in the tank must be removed.
Ten, the pavement of the floor - weld
1. Weld seams can be selected by hand welding torch or automatic welding equipment.
2. The temperature of the welding torch should be set at about 350 degrees.
3. Squeeze the electrode into the opened tank at a uniform speed with a proper welding speed (to ensure the melting of the electrode).
4. When the electrode is semi-cooled, use a welding strip flattener or a monthly cutter to cut the part of the electrode above the plane of the floor.
5. After the electrode is completely cooled, divide the remaining protrusion of the electrode by using a welding strip screed or a monthly cutter.
11. Cleaning and maintenance of the floor
1. PVC series flooring is designed for indoor venue development and should not be used in outdoor venues.
2. Please use the appropriate cleaning agent for regular cleaning and maintenance according to the method recommended by the manufacturer.
3, should avoid toluene, banana water and other high-concentration solvents and strong acid, strong alkali solution dumped on the floor surface, should avoid the use of inappropriate tools and sharp scraper or damage the floor surface.
Twelve, related tools
1, floor treatment: surface humidity tester, surface hardness tester, floor grinding machine, high-power industrial vacuum cleaner, wool roller, self-leveling mixer, 30 liter self-leveling mixing drum, self-leveling tooth scraper, spike shoes, gravity Flat deflate.
2, floor laying: floor trimmer, cutting knife, two-meter steel ruler, glue scraper, steel press roll, slot machine, welding torch, monthly cutter, electrode stripper, combined scriber.
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