Polymer cement-based waterproof coating (referred to as JS waterproof coating) is a liquid material and matching product optimized from synthetic polymer emulsion (such as polyacrylate, polyvinyl acetate, styrene-butadiene rubber emulsion) and various additives. The two-component waterproof coating compounded by powder (composed of special cement and graded sand) is a waterproof material which has high elasticity of synthetic polymer material and durability of inorganic materials.
Polymer cement based coatings contain both organic polymer emulsions and inorganic cements. The organic polymer coating film has good flexibility, low critical surface tension, good decorative effect, but insufficient aging resistance, and cement is a hydraulic cementing material, which has strong adhesion to the wet base surface and good moisture resistance. High compressive strength, but poor flexibility, the combination of the two, can combine organic and inorganic, complementary advantages, rigid and soft, improved impermeability, improved compression ratio, superior overall performance, and achieved better waterproofing.
main feature
1. The active component in the slurry can penetrate into the capillary pores in the cement base surface, microcracks and chemical reaction, and penetrate into the inner crystal of the substrate to form a dense waterproof layer;
2, can cover hairline-like cracks (less than 0.4 mm), resist and slight shock;
3, can be applied on the wet base surface, without the need for a mortar protective layer, you can directly paste the ceramic tile and other subsequent processes;
4. The crystal body penetrates into the pores of the bottom material, and has high anti-seepage and compressive strength, and has a waterproof function of negative water surface;
5, non-toxic, harmless, can be directly used in drinking water tanks and fish ponds; coating has the function of the growth of depression mold, can prevent the contamination of the veneer salt on the veneer.
Scope of application
1. Concrete structure indoors and outdoors, precast concrete structure, cement screed, brick wall, lightweight brick wall structure;
2, floor wall floor, bathroom, kitchen, flower trough; food pool, fish pond, sewage treatment tank;
3. Basement, subway station, tunnel, civil air defense project, mine, building foundation;
4, applied to the pre-layer treatment on the substrate before the paving stone, tile, wood floor, wallpaper, gypsum board, can achieve the effect of preventing moisture and salt pollution.
Construction process
Base layer cleaning→reinforced layer construction→contact sealing→wet base surface→painting first time→conservation→painting second time→conservation→protective layer construction (do or not according to specific conditions)
Construction preparation
1. Carefully inspect the base layer of the waterproof layer, carefully handle the defects, and clean them up.
(1) The base layer should be smooth, smooth, sand-free, non-skinned, and have a certain strength. The drainage slope should meet the design requirements. The yin and yang angle should be rounded or chamfered with a diameter of not less than 30mm.
(2) If the base surface is dry, the base surface must be pre-wetted in advance to keep the base surface moist, but there is no clear water.
(3) Defects in the base layer should be treated before continuing construction.
1 When uneven, pitted, and stagnant water, the high-grade synthetic latex mortar can be used to fill the slope.
2 Surface peeling should be removed.
2. For the repair of the old waterproof layer, the adherend on the base layer should be cleaned and leveled. The surface of the old waterproofing layer is flat, the material is not invalid, and it is compatible with the K11 waterproofing slurry and can be directly constructed on it.
Waterproof slurry construction
K11 waterproof slurry construction (Dr. Waterproof's products have been configured according to comparative examples, can be directly mixed)
1, paint preparation
1 The weighing of ingredients must be accurate, and the weighing error should not exceed ± 5%.
Matching ratio:
General purpose K11 waterproof slurry ratio: additive: powder = 0.36:1;
Flexibility K11 (I) waterproof slurry ratio: additive: powder = 0.80:1;
Flexibility K11 (II) waterproof slurry ratio: additive: powder = 0.68: 1;
2 Pour the additive into the container in proportion and in order, then pour the powder, and stir with an electric stirring drill, and stir well to a paste without precipitation.
Judging whether the standard is uniform: the slurry has no powder group to reach uniformity.
3 After mixing well, it should be placed for 5-10 minutes, then stir it to use;
4 Intermittent agitation should be maintained during operation to prevent precipitation.
2, the preparation of the grassroots
After the base inspection is passed, the surface ash, sand and gravel shall be cleaned, then wetted and then subjected to the next process.
3, enhancement layer and node processing
The reinforcement layer is mainly for the weak part of the construction site, that is, the part that is easy to cause leakage. Adopt enhanced treatment to improve waterproof and safety performance and ensure waterproof effect.
1 In areas that need to be strengthened, such as the corner of the nose and the mouth of the nozzle, the flexible K11 waterproof slurry should be applied 1 to 2 times, and the width should be as specified in the design or specification.
2 The carcass reinforcement material should be laid. After the reinforced coating is dried, the cut carcass material is tiled and then pasted with K11 waterproof paste.
4, paint coating construction
1 When the thickness of the coating layer is within 1.5mmm, it should be divided into two times; in 1.5~2.0mm, it should be divided into three times. After the first pass, apply the second time after the initial drying (interval 2 ~ 4 hours).
Judging the initial dry solid standard: the wall feel is dry, and the touch does not fall off. The floor takes a little longer and depends on people walking.
Will damage the waterproof layer.
2 The brushing should start from the lowest point of the plane from the farthest point of the upper feeding port. When the façade and the plane are required to be constructed, the front plane should be first.
3 According to the quantity of one stirring and the thickness requirement of one painting, the construction surface is divided to control the material of each stirring to be used up in the area to ensure the accuracy of the coating thickness.
4 When the plane is applied, apply the evenly spread paint on the base surface and scrape it evenly with a brush. The two sides of the plane should be perpendicular to each other. When the façade is painted, the brushing direction of the brush should be from bottom to top. Note that the slurry flowing to the corner of the corner should be scraped off in time to avoid cracking caused by excessive accumulation.
5. When the first coating dry solid energy is applied to the second construction, the quality of the coating should be carefully examined, and the leaking and blisters should be checked and added in time.
6. After initial drying, spray water should be used to maintain the best results.
7. Rain, snow and windy days shall not be constructed. The foggy days shall be constructed after the dew is collected and dried. The construction shall not rain for two hours. If rain occurs during construction, rain-proof measures shall be taken.
8. When making a protective layer on the K11 waterproof layer, it should be firmly bonded. When the polyethylene foam board is used as the protective layer, it should be firmly adhered. When using a rigid protective layer such as cement mortar, fine stone slab, block, etc., the transport vehicle should not walk directly on the waterproof layer or directly hit with a sharp object such as a shovel. Waterproof layer.
Construction dosage
The waterproof layer is painted twice, the thickness is about 1mm, and the slurry dosage is:
1. Universal K11 waterproof paste: 2.0kg/m2.
2. Flexible K11 (I) waterproof paste 1.8kg/m2.
Engineering quality requirements and acceptance
1. After the coating is completed, the rigid protective layer is applied before construction. The film waterproof layer should be thoroughly and thoroughly inspected. The pores, scratches, punctures and damages found in the inspection should be repaired immediately. The waterproof layer after completion should not leak.
2. Check that there are no blisters between the coatings.
3. The completed waterproof layer, after 7 days of curing, should be subjected to a 24-hour water-tight test when conditions are met, or it may be checked for leakage after rain or 24 hours.
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