How to apply the current backwater waterproof coating

The effect of waterproof coating on the backwater surface is not good, and it can also be said that there is basically no effect. It is okay to do internal and external waterproofing, but it is better not to do backwater waterproofing alone.

Waterproof construction is also divided into water surface and back water surface? What should I do about waterproofing my backwater? water leakage; The source of the leakage is the source of the water that causes the leakage.

For example, under the premise that the water pipe is intact and undamaged, the water in the shower room flows to the large living room or room according to the mortar layer under the finishing layer, so that the leakage water source is in the shower room. We can do the purpose of moisture-proof and leakage prevention by not using the tap water in the bathroom, and we can also make a sealed ground waterproof for the bathroom, so that the water in the shower room does not flow out and then achieve the purpose of waterproof and leakage-proof.

water leakage routes; The leakage path refers to the movement trajectory and path of water from the root cause to the final leakage point. For example, if the top floor slab leaks water into the room, then the penetrating crack in the concrete floor slab is the leakage route. We can plug the leakage path through grouting, and then exceed the goal of waterproof and leakage prevention according to the disconnection of the leakage path.

Escape some; Escape some are the most visual leaks that people can see. For example, if the top floor leaks into the room, the water that can be seen by the human eye from a certain part of the concrete floor slab will escape. We can achieve the purpose of moisture-proof, waterproof and leakage plugging by plugging and escaping.

No matter what materials you use or what kind of processing technology you use to carry out waterproof leakage plugging, the technical principles can be summarized as: in the permeable building structure, according to the waterproof coating of the waterproof layer (waterproof materials, coatings, other materials with waterproof functions) or other ways to disconnect one or more of the three elements of water leakage, and then produce the building envelope management system of the waterproof layer.

The damp-proof backwater that we often talk about follows the above waterproof and leakage plugging technical principles, and generally we call the side where the building structure is in direct contact with water resources as the frontal surface, and the opposite is the backwater surface. Naturally, the definition of the front water surface and the back water surface is not certain, which is relative to the direction of water resources. For example:

A reservoir excavated in a foundation pit on the land, if we take the surface water around the reservoir as a reference, then the side where the reservoir wall touches the soil is the frontal surface, and the inside of the reservoir is the backwater surface; If we take the water in the cistern as a reference, then the inside of the cistern wall is the facing surface, and the side where the cistern wall touches the soil is the backwater surface.

Hello, of course, when doing waterproofing, it is necessary to divide it, the front surface is the side that can contact the water, and the back surface is not able to contact the water. The waterproofing of the back water surface needs to buy good waterproof materials, and at the same time, the construction should be suitable for the need to brush the waterproof coating twice, and the second brush waterproof paint to see the waterproof dryness of the first brush, if it is too dry, it should be moistened with water, and the front and rear vertical cross brushing.

Waterproof construction is divided into two aspects, one is the water surface, the other is the back water surface, the back water surface can be waterproofed can be added with a layer of plastic protective film.

In the process of waterproofing construction, the waterproofing of the backwater surface is very important, the waterproofing of this position should be reinforced, and the right weather needs to be selected during construction.

In terms of construction work, issues such as waterproofing and fire protection are closely watched. Among the waterproof materials, the backwater waterproof material is deeply loved by people. So what exactly is the backwater material, and can the backwater waterproofing really be prevented? Here's a brief introduction.

It is true that the backwater surface is waterproof, and it is usually made on the inner surface of the structure and has a waterproof barrier effect. The use of backwater waterproofing, that is, the waterproof layer is on the outer surface of the structure. To put it simply, we usually see water leaking out of the water, which is the back of the water.

The coating used for backwater waterproofing should have qualified impermeability and water resistance, and more importantly, the adhesion to the base layer should exceed the water penetration pressure. The water treatment mortar not only has the characteristics of waterproof, dehumidifying, breathable, anti-sulfur and salt crystallization, anti-nitrate pulverization, anti-mildew, etc., but also has the ability to resist water pressure.

The backwater surface waterproofing is true, the backwater surface has the advantage of waterproof and impermeable materials, fine powder, can penetrate into the concrete to close the capillaries, to achieve the waterproof effect.

This can only be done with waterproof paint, nothing else.

From the back of the water, that is, from the bedroom side of the water? I can tell you for sure that it's useless. Must be done from the bathroom. Quite simply, you're not controlling the leak at the source.

If you really can't help it. Then you can only try this, remove the original wallpaper or putty from the bedroom wall, prepare a self-adhesive waterproof membrane, and paint the base coating. In order to improve the adhesion between the waterproofing membrane and the base layer, the base coating can be repeatedly brushed, and the coating is uniform, the coverage is complete, and the concrete base layer is fully penetrated to improve the bond strength and shear strength.

There are the following types of waterproofing materials that can be applied to the back water:

1) Water-based coating materials, cement polymer-based composite coating materials;

2) Mortar and concrete mixed with waterproofing agent;

3) Polymer cement waterproof materials.

In use, attention should be paid to the strengths and weaknesses of various materials, so as to use materials correctly and rationally to achieve the purpose of durable and reliable waterproofing.

The following points should be paid attention to in the selection of materials:

1) When selecting water-based coating materials, the construction environment, humidity and ventilation should be fully considered, because water-based coating materials show waterproof performance after natural volatilization of water into a film, and the degree of water volatilization has a great impact on the waterproof performance of the membrane. In the past, many underground projects have used neoprene asphalt latex paint to do the basement outdoor waterproof layer, although the water resistance of this kind of coating is very good, but often due to the rush period during construction, the water in the coating can not be completely volatilized and covered with the back soil, and the coating layer of the water is not volatilized, when it is soaked in groundwater, it will absorb water and swell, and lose its waterproof performance. Therefore, when using water-based coating materials, it is necessary to ensure the drying time so that the moisture in the film layer can be completely volatilized.

In addition, when using water-based coating materials, it is necessary to consider the waterproof performance of various materials after long-term immersion, there are many materials, the water absorption rate after 168 h immersion is as high as 20 40, and then the waterproof material has lost its waterproof function.

2) When selecting cement polymer-based composite coatings, attention should be paid to the mechanical properties of the materials after 168 h immersion.

3) When selecting waterproofing agent products, the volume shrinkage of the mortar during and after hardening should be fully considered.

4) When selecting polymer cement waterproof mortar and concrete, the volume shrinkage value and bonding strength of different types of polymer cement, as well as the suitability of polymer latex and hydraulic materials in the mixing process should be considered.

When considering backwater surface waterproofing maintenance, in addition to careful selection of materials, it is also necessary to consider the construction process.

1) for the underground engineering of cast-in-place concrete, if water seepage is found, the source of seepage water should be found as soon as possible, if only the local concrete is not dense and honeycomb causes water seepage, local plugging and grouting treatment can be taken, through the solidification of the slurry to make it re-establish the waterproof curtain in the gap where it is not compact, to achieve the purpose of water leakage. If there is a large area of diffuse, the overall waterproofing treatment should be considered.

2) For the underground engineering of frame brick-concrete structure, once leakage, in addition to local plugging and grouting according to the situation, all waterproof treatment must be done to ensure the waterproof effect.

3) For the leakage water of deformation joints and construction joints, a waterproof treatment plan should be formulated according to the specific situation.

Summary. Back water waterproofing, what materials to say are suitable for back water waterproofing materials, mainly cement-based permeation crystallization. As a permeable waterproof material, it performs well in compression resistance; The second is silicone waterproof materials, because this kind of waterproof materials belong to rigid waterproof materials, the pressure bearing capacity after hardening is good, and it is suitable for backwater waterproofing.

Back waterproofing, what to do with the material.

Back water waterproofing, what materials to say are suitable for back water waterproofing materials, mainly cement-based permeation crystallization. As a permeable waterproof material, his anti-pressure performance is very good; The second is the silicone waterproof material, which is a rigid waterproof material in this kind of waterproof material, which has a good pressure-bearing capacity after the hardening of the reed shed, and is suitable for waterproofing on the back water.

Does cement-based penetration work, do it several times.

The proportion of cement-based permeable macrocrack crystalline cement according to the different engineering and construction methods, the general brushing method is painted twice, the amount per square meter, and the construction amount of the dry spreading method is about to be grinded.