What are the precautions for the construction method of cement based waterproof coating?

Coating construction plan: base surface (substrate) treatment: the substrate must be firm, smooth, clean, free of dust, greasy, wax, release agent, etc. and other debris substances; If there are pores, cracks and inequality defects on the base surface, it must be repaired and smoothed with cement mortar in advance, plastic strips are recommended to be pasted on the expansion joints, a layer of non-woven fabric must be added to the nodes, and nozzle grouting is recommended to be used for nozzle filling; The yin and yang corners should be wiped into an arc shape (or V-shaped); Make sure the base surface is sufficiently wet, but there is no open water; Freshly poured concrete surfaces (including plastered surfaces) should be allowed to dry and set completely before construction.

How to use: Stir: Pour the liquid into the container first, then slowly add the powder, and stir fully for 3-5 minutes until a uniform slurry without raw flour and particles is formed. (preferably with a blender) brush:

Use a brush or roller brush to apply directly to the base surface, and the strength is used evenly, and the brush should not be missed; Generally, it needs to be brushed twice (according to the requirements of use), and the thickness of each brush should not exceed 1mm; After the previous one is slightly dry, the next brush is carried out (just non-sticky, generally 1-2 hours apart), and the front and back two vertical cross brushes, the total thickness of the brush is generally 1-2mm; If the coating has already cured, moisten it with water first when applying another layer. Curing: After 24 hours of construction, it is recommended to cover the coating with a damp cloth or spray water to cure.

Protection: Before it is completely dry after construction, please take protection against trampling, rain, exposure to the sun, sharp damage, etc. Examination (closed water test):

Toilets, pools, etc., should be filled with water for 48 hours after the waterproof layer is dried (at least 24 hours in summer, at least 48 hours in winter) to check whether the waterproof construction is qualified. Lightweight walls must be tested for watering.

Pay attention to the waterproofing to be in place. Use a brush or roller brush to apply directly to the base surface, and the strength is used evenly, and the brush should not be missed; Generally, it needs to be brushed twice (according to the requirements of use), and the thickness of each brush should not exceed 1mm; After the previous one is slightly dry, the next brush is carried out (just non-sticky, generally at an interval of 1 2h), and the front and rear vertical cross brushing, the total thickness of the brush is generally 1 2mm; If the coating has already cured, moisten it with water first when applying another layer. Special attention should be paid to the corner part of the wall to be treated into an arc type and then painted, and the painting can not be too thick (the total thickness does not exceed 2); The pipe through the wall should be covered with a casing, and the holes of the casing and the wall should be filled with a plugging king, and the waterproof material should be brushed to the height of the casing 10 and not too thick.

Brushing: The base layer should be fully moistened but not open water, and the floating ash should be minimized. Good base can be wetted, such as aerated bricks, light walls, inferior mortar base layers, etc., need to be treated with wall Beili interface agent mixed with water and glue.

Remember to control the thickness of the yin corner, and do not pile up the material. The first pass is applied as thinly as possible, and the second and third passes are applied normally; Be sure to dry it completely before applying the next coat; Because the JSA waterproof coating contains more emulsion, and less active material, this makes the shrinkage and cracking of the emulsion film forming process easier, which makes it more difficult to apply the negative angle with JS waterproof coating to reduce the risk of cracking. Pay attention to the position and height of the waterproof applied.

Ground; Generally, the wall is repainted and brushed 30 high; Paint the wall around the shower area 180 high or to the top of the wall; There is a bathtub where the upper brush is 30 higher than the bathtub.

Cement-based waterproofing material is a waterproofing material formed after mixing cement with polymer emulsion.

Cement-based "waterproof coating" means that the main material of this kind of waterproof coating is a powdered waterproof coating made of cement as the base material, mixed with a variety of active chemicals and auxiliary materials, or a waterproof coating made of various modified additives with polymer emulsion (acrylic high-elasticity waterproof emulsion), and then used with cement in a certain ratio.

1. Base surface treatment.

The bottom layer must be fully cured, intact and free of dust, removing slurry, oil, grease, release agent and other impurities that can affect the waterproofing effect. Before construction, the concrete base surface is fully moistened with clean water (there can be no open water during the construction of the base surface), which can accelerate the chemical reaction between the special active chemicals in the product and the substances in the concrete, and improve the adhesion between the waterproof material and the base surface.

2. Stir. According to the specific construction method, the powder is mixed with clean water in strict accordance with the water-cement ratio. After the mixed slurry stands for 5 minutes, it can be used after a little mixing. The mixing material should be mixed thoroughly and mixed well, which is the guarantee of construction quality.

3. Brushing. During construction, it is necessary to paint carefully on the cracks, chips, rough surfaces and other detailed structures. Use a hard bristle brush or other painting tools to evenly coat the mixed penetrating crystalline waterproof coating on the base surface, and the painting direction should be consistent and uniform without depression, and the coating amount should be square meters. After the first layer is dry, the second layer should be painted, and the previous coating should be moistened with water before brushing the second layer, and the coating direction of the second layer should be perpendicular to the direction of the first layer.

4. Smearing. Use a batch knife to wipe the slurry on the base surface, and carry out the construction according to the amount of square meters, and do not miss the coating.

5. Dry sprinkling. Dry sprinkling construction is mainly used for construction before concrete pouring or after concrete pouring is compacted and rolled and leveled, and there is no hardening, which has certain limitations. During the dry sprinkling construction, the concrete must be constructed before the initial setting, and the powder must be evenly sprinkled on the wet concrete surface according to the amount of square meters, and compacted and wiped in time. After the final setting, check whether there is a defective construction site and repair it in time; If it is exposed to the sun, it should be sprinkled with water for maintenance.

Be careful to spray evenly.

6. Maintenance. Proper curing is very important to ensure the durability and quality of the mortar layer. In order to prevent cracks and chalking on the surface of the coating, the waterproof coating should be kept wet, once the waterproof material coating begins to solidify after construction, it is necessary to start curing, spray the waterproof material coating with spray water, spray 3 4 times a day, if the weather is hot, the number of sprays must be increased.

It must be protected from rain, sand, sewage and frost within two days after construction. For concrete elements that need to be filled with liquid, they can be used only after three days of curing and then left for another two weeks.

Base surface leveling, cleaning the base surface, wetting the base surface, painting the first waterproof coating, painting the second waterproof coating, quality acceptance, covering construction.

Construction operations. 1. Before the construction of waterproof coating on the dry base surface, the base surface should be moistened to the absence of clear water, if the base surface is wet but there is no clear water, it can be directly constructed.

2. Pour the waterproof slurry emulsion into the mixing bucket according to the ratio, then pour the powder (cement) in, stir fully until it is uniform and paste-free, and then stir it after standing for ten minutes, the effect is better.

3. Use a brush or roller brush to directly apply the glue to the base surface, and after the first layer is completely dry (about 2 hours or hand wipe is not sticky), then brush the second time, and the direction of the two brushes should be staggered.

4. Intermittent stirring should be maintained during the operation process to prevent the glue from settling.

5. After the waterproof layer is completely dry, the mortar protective layer or other covering layer can be made on it.

Construction precautions.

1 It is forbidden to work under 5 years old or in the case of rain.

2. If the construction is in a particularly humid and ventilated environment, ventilation equipment should be used to speed up the film formation of the waterproof coating, so as not to affect the quality of the waterproof layer;

3. Do not mix the dried mortar with water before use;

4. Node processing shall be carried out according to the requirements of relevant specifications, and it is recommended to add a layer of glass fiber mesh;

5. Within 24 hours after the slurry is applied, it is necessary to prevent people from walking and not wearing high heels or spikes into the waterproof area.

6. Before the completed waterproof layer is not a protective layer, there shall be no iron, steel nails, steel bars, scaffolding and other angular heavy objects to be constructed or stacked on the waterproof layer, so as not to damage the waterproof layer;

7. After the waterproof layer is completely dry, other covering layers can be made;

8. Take protective measures, such as wearing gloves.

All kinds of high-rise buildings can be seen everywhere on the street, and it can be seen that the construction industry has been greatly developed, and there are many waterproof coatings on the market. Among them, the more famous is the cement-based waterproof coating, which is now widely used in various buildings, I believe that many people do not know much about the correct construction method of cement-based waterproof coating. Therefore, in order to make people better understand the cement-based waterproof coating, next, what are the problems that should be paid attention to in the construction process of cement-based waterproof coating?

How much is cement-based waterproofing paint?

1. Deal with the base surface (substrate) of the waterproof position. The base surface is treated into a firm, flat and clean surface, free of dust, greasy, wax and other debris substances; If there are pores, cracks and unequal defects on the base surface, it must be repaired and smoothed with cement mortar in advance, plastic strips are recommended to be pasted on the expansion joints, a layer of non-woven fabric must be added to the node, and the nozzle is recommended to use plugging king or nozzle grout; The corners of the wall should be plastered into an arc shape (or V-shaped); Make sure the base surface is well wet, but none;

2. Naina should pay attention to the waterproofing and construction in place. Use a brush or roller brush to apply directly to the base surface, and the strength is used evenly, and the brush should not be missed; Generally, it needs to be brushed twice (according to the requirements of use), and the thickness of each brush should not exceed 1mm; After the previous one is slightly dry, the next brush is carried out (just non-sticky, generally at an interval of 1 2h), and the front and rear vertical cross brushing, the total thickness of the brush is generally 1 2mm; If the coating has already cured, moisten it with water first when applying another layer. In particular, the corner part of the wall should be treated into an arc type and then painted, and the painting should not be too thick (the total thickness should not exceed 2); The pipe through the wall should be sleeved with a casing, and the holes of the casing and the wall should be filled with a plugging king, and the waterproof material should be brushed to accompany the casing to 10 high and not too thick;

3. Pay attention to the position and height of waterproof painting. Ground; Generally, the wall is repainted and brushed 30 high; Paint the wall around the shower area 180 high or to the top of the wall; There is a bathtub where the upper brush is 30 higher than the bathtub.

4. Do a good water test. After the waterproof coating is painted to form a waterproof layer (about 24 hours later), the water storage is 20 high, and after 24 to 48 hours, see if the water is significantly reduced or go downstairs to see if there are wet water spots on the roof, and if not, it means that the waterproof construction is successful.

5. Do a good job of protecting the waterproof layer in the later decoration to avoid damaging the waterproof layer.

How much is cement-based waterproofing paint?

1. Beijing Rainbow Ten Year Brand Jialigu: 100

2. Good Naidpro W 20 waterproof coating: 400

3. Lauders JS 991 polymer cement-based defense: 168

What are the problems to be paid attention to in the construction process of cement-based waterproof coatings? How much is cement-based waterproofing paint? That's it for you.

I believe that after reading so many introductions, you have a deeper understanding of cement-based waterproof coatings. It can be used better on a daily basis. Most cement-based waterproofing coatings are used for waterproofing exterior walls.

I hope the introduction can help everyone.

Cement-based waterproof coating, he means that the main material of this kind of waterproof coating is a powdered waterproof coating made of cement as the base material, mixed with a variety of active chemicals and auxiliary materials, or a waterproof coating made of polymer emulsion (acrylic high-elasticity waterproof emulsion) with various modification additives, and then applied with cement according to a certain ratio. So what are the types of cement-based waterproof coatings, and how to use cement-based waterproof coatings? If we don't know, let's learn about it.

What are the types of cement-based waterproof coatings?

1.cementitious waterproof coating impregnated with cement; polymer cement waterproofing coatings; polymer cement waterproofing mortar; Polymer cement waterproofing slurry and several other models.

2.The commonly used raw materials for cement-based heatstroke coatings are: cement; quartz sand; quartz powder; heavy calcium carbonate; Talcum powder; hydroxypropyl methylcellulose; Re-loose latex powder; polymer emulsions; superplasticizers; cement-based impregnated crystalline active masterbatch; Double fast cement, etc.

How to use cementitious waterproofing coatings:

1.Deal with the base surface (substrate) of the waterproof orientation. The base surface is treated into a solid, smooth, clean, dusty, greasy, wax and other detritum substances; If there are pores, cracks, and inequalities on the base surface, it must be repaired and smoothed with cement mortar in advance, plastic strips are proposed to be posted on the expansion joints, a layer of non-woven fabric must be added to the nodes, and the nozzle filling is advocated to use plugging king or nozzle grout; The corners of the wall should be plastered into an arc shape (or V-shaped); Ensure that the base surface is abundant and moist, but there is no obvious water;

2.Pay attention to the waterproofing to be in place. Use a brush or roller brush to apply directly on the base surface, and the strength is applied evenly, and the brush should not be missed; Generally, it needs to be painted twice (according to the application requirements), and the thickness of each painting does not exceed 1mm; After the previous one is slightly dried, the next brush is carried out (just not sticky, generally 1-2h), and the front and back are straight cross through the Hui Bei insertion brush, and the total thickness of the brush is generally 1-2mm; If the coating has now cured, moisten it with water first when applying another layer.

In particular, it is necessary to pay attention to the corner part of the wall to be treated into an arc type and then painted, and the painting should not be too thick (the total thickness does not exceed 2); The pipe through the wall should be covered with a casing, and the holes of the casing and the wall should be filled with a plugging king, and the waterproof materials should be brushed to the height of the casing 10 and not too thick;

3.Pay attention to the orientation and height of the waterproof painting. Ground; Generally, the wall is repainted and brushed 30 high; Paint the wall around the shower area 180 times high or to the top of the wall; There is a bathtub on the direction of the flip brush 30 higher than the bathtub.

4.Do a good water test. After the waterproof coating is completed to form a waterproof layer (about 24 hours later), the water storage is 20 high, and after 24 to 48 hours, see if the water is significantly reduced or go downstairs to see if there are wet water spots on the roof, and if not, it means that the waterproof construction is successful.

What are the types of cement-based waterproof coatings and how to use the comprehensive content of cement-based waterproof coatings, so much for us today. In this regard, it is still necessary to remind us to do a good job in the maintenance of the waterproof layer in the later decoration to prevent damage to the waterproof layer.