Any type of waterproofing material is designed for use in specific conditions. Waterproofing, intended for coating the foundation, is no exception. This is a special coating waterproofing - a special multi-layer coating. Often, everyone uses the TechnoNicol brand for coating.
Depending on the purpose, it can have a different thickness, the values of which vary from a millimeter to several tens of millimeters.
It depends on the purpose of the material, on the conditions of use in which it will show its waterproofing qualities.
Lubricating insulation can be used for interior and exterior protection of rooms and buildings.
Today, a variety of types of waterproofing for foundations are on sale.
All of them differ in service life, technical characteristics, application methods, composition and features of the device.
Each specific species is used in the appropriate climatic conditions.
However, we can responsibly state that durable and relatively inexpensive waterproofing coatings are always in high demand.
What is this material? These are usually plastic liquid formulations designed to reliably protect brick and concrete surfaces.
The applied agent, after curing, forms a strong, seamless film with good resistance to mechanical stress, protecting it from moisture and ultraviolet radiation.
Lubricating waterproofing must meet the following requirements:
All variety of materials of this type can be conventionally
subdivided into the following groups:
Polymer-cement waterproofing is a mixture of complex polymer compositions that are able not only to bind cement, but to provide the protective layer with the required elasticity. Cement is added to the product to somewhat reduce its cost, as well as to increase its mechanical strength.
Bituminous mastic was originally used as one of the types of rolled roofing material. Its fundamental difference lies in the fact that it does not need to be heated, and therefore it can be used at any time of the year, including cold weather.
Bituminous and polymer mastics cover the previously cleaned surfaces: the plastic agent evenly fills all pores and surface cracks.
Coated waterproofing of the foundation protects it from the harmful effects of groundwater, as well as from waters with a deep bedding horizon. Mastics will work optimally when the burial depth is approximately 2 meters below the base.
The technology of application and manufacturer's recommendations are supposed to cover foundation with 2-4 layers of means, not less.
The exact number of layers depends on how deep the foundation is.
The base depth correlates with the thickness of the waterproofing layer as follows:
The application technology of the material should be carefully followed according to the manufacturer's recommendations.
Waterproofing layers are applied independently of each other, before applying the next, the previous one should be well dry out. If the next layer is applied to a damp surface, then after a while it may peel off, then air and moisture get inside, which destructively act on the foundation.
How to determine that the waterproofing layer is dry enough? It is not difficult to do this, it will be enough to run it over the surface with your palm. If it sticks, sticks to the skin, then it is not dry yet.
The dried mastic is soft and elastic to the touch. The speed of drying of each individual layer depends on the manufacturer of the material, its composition, the humidity of the treated surface and the ambient temperature.
Note an important condition. Before proceeding with the application of waterproofing material, you need to properly prepare the base. Only in this case, the working qualities of the waterproofing layer will work to the full.
Such uneven joints are not uncommon for formwork connection zones.All dangerous edges must be sanded or chipped away.
The quality of adhesion of the surface of the base and the applied mastic depends on such an indicator as the moisture content of the foundation.
Even low humidity values can cause deformation of the surface of the protective layer.
The connection of the base and the mastic is broken, it does not hold well, and can flake off and even fall off over time. What moisture indicators are considered the maximum permissible?
For polymer-bitumen and bitumen insulation, they should not exceed 4 percent, and for water-based insulation they are slightly higher - 8 percent.
It is strictly forbidden to cover a wet surface with a coating paste.
How do I know if the substrate is dry enough and can I start working on it? There is a very simple way: about a square meter of base area, a film of polyethylene.
If condensation does not appear from the inside within 24 hours, you can start working.
Primer is a special type of bituminous primer, which contains various mineral components. They help to improve the adhesion of the mastic to the concrete base, ensuring optimal adhesion to the material.
For each type of foundation, the primaries are selected individually. The highest cost are primer compositions for rubble and brick structures.
For the manufacture of a primer, bitumen of the BNK 90/30 or BN 70/30 brand is used; nefras or gasoline is taken as a solvent. The heat resistance of this mixture does not exceed 80 degrees.
For each type of mastic, the primer is selected individually : it is applied evenly over the entire surface in one layer. In the event that there are joints between horizontal and vertical concrete slabs in the foundation, it is worth applying two layers.
The composition is applied with a brush or roller, then wait for its final drying.
Putty putty is applied as follows:
Each successive layer should be uniform and without breaks. The coating waterproofing is applied in parallel strokes, from bottom to top.
After the final hardening of the previous layer, you can proceed to the next one.
Foundation waterproofing will last a much longer period if you take care of its reinforcement in advance.
Reinforcement is placed at the junctions where the foundation sections are usually subjected to increased pressure.
What can serve as an armature ? In this capacity, fiberglass or fiberglass is usually used, characterized by a small outer diameter and excellent flexibility. It is allowed to use roll materials.
The density of the resulting mesh-reinforcement should have values from 100 to 150 grams per square meter.
How does the reinforcement work? Fiberglass is slightly recessed into the initial layer of mastic, pressed with a roller, then fixed with plastic staples. In this case, the adhesion of the reinforced waterproofing to the foundation will be optimal.
A transverse reinforcement is preferred, which thickens the useful waterproofing layer. If there is not enough space for applying the mastic, the joints should be deepened. The inner surface is treated with a primer.
What are the advantages of the reinforcement of the lining waterproofing ? It ensures uniform distribution of loads over the surface, makes the material much more plastic and reduces its elongation.
This procedure, of course, increases the cost of construction work, but it improves the quality of waterproofing: it provides additional strength to the layers, and durability of the entire structure.
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Posted By: Work Style |09, Nov 2020
Posted By: Work Style |09, Nov 2020
Posted By: Work Style |10, Nov 2020
Posted By: Work Style |03, Nov 2020
Posted By: Work Style |04, Nov 2020