Cement and what together can do waterproofing

First, polyurethane waterproof coatings. These materials are generally made of polyurethane and coal tar. The tar gas it volatilizes is highly toxic and not easy to remove, so it was banned in China in 2000.

The polyurethane waterproof coating that is still on sale uses asphalt instead of coal tar as a raw material. However, when using this kind of coating, it is generally diluted with organic solvents such as toluene and xylene, so it also contains toxicity;

The other type is polymer cement-based waterproof coatings. It is composed of an emulsion synthesized from a variety of water-based polymers and high-quality cement mixed with various additives, and the flexibility of the polymer (resin) is combined with the rigidity of the cement, which makes it excellent in terms of impermeability and stability. Its advantages are convenient construction, low comprehensive cost, short construction period, and non-toxic and environmentally friendly.

As a result, polymer cementitious bases have become the protagonists of the waterproofing coatings market.

What can be added to cement mortar for waterproofing: pro-cement mortar can be waterproofed and mixed with waterproofing agent. This is a method with cement as the main body, adding waterproofing materials such as waterproofing agent or waterproofing powder to the cement, and then using machinery to evenly stir together to become cement-based permeable crystallization and apply it to the back water.

Advantages: The material is cheap and easy to construct. Cons:

The waterproof effect is average, not very good, if it is used for ground laying. It is far from enough to use cement mortar for waterproofing, it is best to lay a layer of engineering membrane first, so that it is less likely to cause leakage and other problems. Polymer emulsion is added.

Polymer emulsion can be added to the cement, and then fully stirred, becoming a more popular polymer cement waterproof coating on the market.

In the construction of houses and other buildings, cement is the same basic material, it is used in large demand, and its performance also affects the construction quality of the house. When mixing cement, it is necessary to add some waterproofing agent, so that the coagulated cement can have a good waterproof effect, so what can be added to cement to do waterproofing? What should be paid attention to in the construction of polymer cement waterproof coating?

Polyurethane materials can be added, although its waterproof performance is good, it contains certain harmful substances, the smell is more pungent, and a mask needs to be worn when adding to avoid excessive inhalation; You can also add polymer as a waterproof material, which is environmentally friendly and non-toxic, has good stability and convenient construction, and is now used more.

What to pay attention to in the construction of polymer cement waterproof coatings.

1. Stir evenly.

When adding polymer material, it must be evenly and fully mixed with cement, not perfunctory, if the mixing is not uniform, then the cement will be cured after the performance of its coating film will be greatly reduced, and its waterproof effect is difficult to guarantee.

2. Don't add too much water.

In order to improve the permeability of waterproof cement to the base layer, so as to improve the adhesion between the cement and the base layer, generally speaking, an appropriate amount of water can be added to the cement waterproof coating in the first painting process, but the amount of water added is proportional.

3. The key parts should be strengthened carcass.

For the root of the pipe, the yin and yang corners of the wall and other parts, these places are often easy to be overlooked, if the waterproof is not treated in place, it is easy to crack, leakage and other problems. When doing waterproofing, setting up a reinforced carcass in these places can effectively avoid cracking, leakage and other problems, which we need to pay attention to.