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PVC floor construction technology(1)

Views:116 Author:Site Editor Publish Time: 2020-09-27 Origin:Site

1. Floor testing Use a temperature and humidity meter to test the temperature and humidity. The indoor temperature and the surface temperature should be 15℃, and the construction should not be below 5℃ and above 30℃. Suitable for construction, the relative humidity should be between 20%-75%. Use the moisture content tester to detect the moisture content of the base layer, the moisture content of the base layer should be less than 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. The result of testing with a hardness tester should be that the surface hardness of the base layer is not less than 1.2 MPa. For the construction of PVC floor materials, the unevenness of the base layer should be less than 2mm within the range of a 2-meter ruler, otherwise, suitable self-leveling should be used for leveling.

2. Floor pretreatment: Use a floor grinder of more than 1,000 watts with appropriate grinding pads to polish the floor as a whole, remove paint, glue and other residues, raised and loose plots, and plots with hollows. Remove. Use an industrial vacuum cleaner of less than 2000 watts to vacuum and clean the floor. For cracks on the floor, stainless steel reinforcing ribs and polyurethane waterproof adhesive surface can be covered with quartz sand for repair.

3. Self-leveling construction-base layer with absorbent base such as concrete and cement mortar leveling layer should first use multi-purpose interface treatment agent to dilute with water at a ratio of 1:1, and then seal base. For non-absorbent substrates such as tiles, terrazzo, marble, etc., it is recommended to use a dense interface treatment agent for primer. If the moisture content of the base layer is too high (>3%) and construction is required immediately, epoxy interface treatment can be used, but the premise is that the moisture content of the base layer should not exceed 8%. The interface treatment agent should be applied uniformly without obvious effusion. After the surface of the interface treatment agent is air-dried, the next step of self-leveling construction can be carried out.

Fourth, self-leveling construction-mixing

Put one pack of self-leveling into a mixing bucket filled with clean water according to the specified water-cement ratio, and mix while pouring. In order to ensure uniform self-leveling and mixing, a high-power, low-speed electric drill with a special mixer must be used for mixing. Stir to a uniform slurry without lumps, let it stand and mature for about 3 minutes, then stir briefly again. The amount of water added should be strictly in accordance with the water-cement ratio (please refer to the corresponding self-leveling manual). Too little water will affect fluidity, and too much water will reduce the strength after curing.   

         Self-leveling construction-laying 

Pour the mixed self-leveling slurry on the construction floor, it will flow by itself and level the ground. If the thickness is ≤ mm, it needs to be scraped with a special tooth scraper. Afterwards, the construction personnel should put on special spikes, enter the construction ground, and gently roll on the self-leveling surface with a special self-leveling flat air cylinder to release the air mixed in the mixing to avoid bubble pockmarked surface and interface height difference. Please close the site immediately after the completion of the construction. It is forbidden to walk within 5 hours, and avoid heavy objects within 10 hours. The PVC floor can be laid after 24 hours.  For winter construction, the floor should be laid 48 hours after self-leveling construction. If fine grinding and polishing of self-leveling is required, it should be carried out 12 hours after self-leveling construction.