④ The construction environment shall be well ventilated, and fireworks are strictly prohibited on the construction site.
When the light color coating protective layer is adopted, the stone slag shall not be scattered thinly.
After the first coating is cured for 24h, scrape and apply the second waterproof coating on it.
⑨ The coating shall be prepared and used on site, and the mixture must be used up within 4h, otherwise it will solidify and cannot be used.
First pour component a paint into the mixing drum, then pour component B paint into the mixing drum, and mix it with an electric mixer with a rotating speed of 100 ~ 500r / min for about 5min.
⑪ The coating is flammable and toxic.
Preparation of primer: mix component a of polyurethane coating and component B specially used for primer according to the mix ratio of 1: (3 ~ 4) (quality), and then mix evenly with an electric mixer; You can also mix the components a and B of polyurethane coating according to the specified proportion, and then add a certain amount of diluent to stir evenly before use.
The evenly mixed mixture can be scattered and dumped on the brushing surface, and a layer of coating can be evenly scraped with a plastic or rubber scraper.
② Ingredients must be accurately weighed in strict accordance with the mix proportion provided in the product manual, and fully stirred evenly to avoid affecting the curing of the film.
When brushing, it shall be applied fully and thinly.
The construction process flow of polyurethane waterproof coating is shown in Figure 3-22.
It shall be sealed during storage and stored in a cool, dry place without strong direct sunlight.
⑥ Lay matrix reinforcement.
Small areas can be coated with a paint brush.
It should be noted that the selected diluent must be the supporting diluent specified in the product manual of polyurethane coating, and other diluents shall not be used.
④ Apply the first coat of paint.
Construction process flow ① construction process flow.
⑤ Apply the second coat of paint.
After the coating at the local treatment part is dry and solidified, the first coating can be applied and scraped.
The brushing shall be uniform, not too thick or too thin, and not exposed to the bottom.
② Apply primer.
The film shall be free from defects such as bulge, falling off, cracking, edge warping and loose sealing of the end.
The purpose of applying primer (primer) is to isolate the moisture of the base layer, prevent the swelling and falling off of the waterproof film, strengthen the base layer, improve the bonding strength between the waterproof film and the base layer, and prevent the coating from pinholes, pores and other defects.
After the film is cured, the construction of rigid protective layer or other protective layers can be carried out.
| Prepared by: Wang Zhe Yang Baomin | Checked by: Peng Liyun | Editor: Wang Zhe Yang Baomin..
⑦ After the coating construction is completed, it is not allowed to step on it before it is fully cured, so as not to damage the waterproof layer.
⑧ The rigid protective layer and the coating film shall be firmly bonded, and the surface shall be flat without defects such as hollowing, loosening, falling off, edge warping, etc.
During large-area coating, the internal and external corners, pipe roots and other complex parts shall be painted evenly with a paint brush, and then the large-area coating construction shall be carried out with a long handle roller brush.
At the beginning of scraping, the scraping sequence and construction road shall be uniformly considered according to the construction area, shape and environment.
The thickness of the second waterproof coating is 1mm, and the coating dosage is about 1kg / m ²。 The direction of scraping shall be perpendicular to the direction of the first coating.
02 precautions for construction ① when the viscosity of the coating is too high for scraping, a small amount of diluent can be added.
⑩ Clean the used utensils and utensils.
③ Coating configuration.
* Notice: some of the contents of this picture and text come from the Internet and the copyright belongs to the original author.
⑥ If there is still sticking after scraping the first layer of paint for 24 hours, apply some talc powder before the second coating construction, so as to avoid sticking feet.
This practice has no adverse effect on the quality of waterproof layer.
The scraping thickness is generally about 1.5mm, and the amount of coating is 1.5kg/m ² about.
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In order to increase the bonding force between the waterproof layer and the cement mortar layer of cement mortar protective layer or other facing materials, a layer of clean stone slag shall be thinly sprinkled on the surface before the second coating is cured.
The method of coating and scraping is the same as that of the first coat.
When the waterproof layer needs to be paved with matrix reinforcement materials such as glass fiber or chemical fiber non-woven fabric, it shall be pasted before the second coating is applied.
⑤ During scraping, the thickness shall be uniform, not too thick or too thin, and not exposed to the bottom.
The diluent used must be the supporting diluent or formula specified in the product manual, and other diluents shall not be used.
③ The construction temperature should be above 0 ℃, and construction in rainy and foggy days is not allowed.
⑧ Construction of protective layer.
Generally, it can be painted once on the base surface.
Generally, the amount of primer is 0.15 ~ 0.20kg/m ²。 The primer shall be dried for more than 24h after coating, and then the next process can be carried out.
During scraping, uniform force is required to make the coating uniform and uniform, and it shall not be too thick or too thin.
According to the construction dosage, the coating shall be mixed according to the mix proportion provided in the product manual.
The paving method can be wet paving or dry paving.
⑦ Scattered stone dregs.
