What is the impermeability of concrete?

The term “impermeability” or “sealing” is used for concrete when, due to long-term exposure of one face of concrete to water and moisture, water does not penetrate into the concrete and does not pass through the other side, or it forms moisture spots (damp). ) should not appear on that side of the concrete. This indicates that on the back side of the concrete, evaporation occurs much faster than absorption, and as a result, moisture does not remain in the concrete. There is a general standard for the impermeability of concrete, and that is that the maximum amount of water that is absorbed inside the concrete in a certain period of time should not be more than 50 millimeters, in this case it can be said that the concrete is impervious and properly sealed. has been

What is the impermeability of concrete?

The term “impermeability” or “sealing” is used for concrete when, due to long-term exposure of one face of concrete to water and moisture, water does not penetrate into the concrete and does not pass through the other side, or it forms moisture spots (damp). ) should not appear on that side of the concrete. This indicates that on the back side of the concrete, evaporation occurs much faster than absorption, and as a result, moisture does not remain in the concrete. There is a general standard for the impermeability of concrete, and that is that the maximum amount of water that is absorbed inside the concrete in a certain period of time should not be more than 50 millimeters, in this case it can be said that the concrete is impervious and properly sealed. has been

Concrete impermeability depends on what factors?

In order to produce impermeable concrete with very low moisture absorption, a series of things need to be followed correctly, among these things, the following can be mentioned.

Attention to the ratio of water to cement

In order to produce impermeable concrete with an acceptable sealing level, it is necessary to consider the ratio of water to cement less than 45%, so that the combination of water and cement is done efficiently, and as a result, the cement paste made has minimal water-permeable holes. to be In the same way, when the ratio of water to cement exceeds 65%, the impermeability of concrete will increase quickly, and in the same way, if the ratio of water to cement increases from 45% to 80%, the impermeability of concrete will increase to 100 times.

Executive seams

Executive seams are the parts where water is likely to penetrate through them, for this reason it is very important to avoid them as much as possible and close their ducts. Since weakly porous layers may adhere to the surface of old concrete and increase water absorption, it is very important that the mixture is produced in the right amount and with minimum water usage in mind.

applications :

Coastal structures
Water retaining structures
Concrete pavements
High strength concrete
Structures exposed to dynamic loads, impact and fatigue
Thin concrete sections
Concrete structures exposed to extreme cycles of melting and freezing
Military and defense concretes
Types of concrete sealing methods (impermeable concrete manufacturing methods)
Concrete sealing by sheet
Concrete sealing through liquid shells
Concrete sealing through concrete additives

Advantages of making impermeable concrete

Creating maximum durability of concrete structures
High execution speed
Prevent water from entering the structure

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