Asbestos cement sheet: advantages and disadvantages, scope
The asbestos cement sheet, better known as slate, has not lost its fame for a unique building material for many decades, and has been successfully applied in modern construction.
Slate sheets for today are made in two versions - wave and flat.
But if the profile wavy sheet is used only as a roof covering, then the flat one finds a much wider application.
It is used in the construction of residential buildings, andalso administrative and industrial facilities. The asbestos cement flat sheet in this case is used as a fixed foundation for the foundation, used to construct unloaded partitions in the building, as one of the components of a flat roof pie, dry screed for floors or as a fence for balconies and loggias.
In the production of sandwich panels, slate is a facing component.
In agriculture, it is used to erect fences, pens for livestock, cells at poultry farms.
Types of asbestos cement sheets
Slate is a mixture ofincludes asbestos fiber, Portland cement and water. Distributing evenly in the total mass of the composition, it is asbestos that creates a reinforcing base, imparting impact strength and tensile strength to the sheets.
Depending on the production technologyAsbestos cement sheet is produced unpressed and pressed. The pressing method makes it possible to significantly improve its performance characteristics, thereby increasing the strength and reducing the porosity.
Since unpressed slate has a lower strength and a 2-fold less thawing-freezing cycle than its pressed analogue, it is applied only inside buildings.
Both types of slate are not very expensive, and the unpressed asbestos cement sheet is much cheaper.
Advantages and disadvantages
This building material is not accidentally in high demand. It is distinguished by high technical characteristics, the main of which are:
- frost resistance and ability to tolerate temperature changes well;
- no deformation when heated;
- high strength;
- good sound insulation;
- indifference to ultraviolet;
- high fire safety;
- the ability not to accumulate static electricity and not to shield electromagnetic fields;
- high anticorrosive properties;
- resistance to rot and mold;
- ease of processing and ease of installation;
Such properties have all kinds of slate. Along with this, the flat pressed asbestos cement sheet has even better qualities:
- double the ability to withstand temperature changes;
- higher safety margin;
- very low porosity.
Due to the latter property, its water absorption decreases, and the sheet successfully resists the appearance of moss on its surface.
Durability in 30 years, which is inherent in non-pressed slate, increases to 40-45 years.
One of the main disadvantages is the relative fragility of the sheets, which requires increased attention during transportation and installation.
In addition, they include:
- the severity of the sheets, which makes it impossible to lay them alone;
- the need for cutting tools to cover sections with special compositions;
- tendency (over time) to the appearance of moss.
To extend the life and saveoperational characteristics, all types of slate need additional color. Thanks to this, over time, the sheets practically do not collapse, the emission of asbestos particles into the air decreases, the water absorption decreases, which increases the frost resistance, and also creates a barrier to the growth of lichens and mosses.
Asbestos cement sheet (slate) is processedspecial acrylic paints. They not only create a protective film on its surface, due to which the service life increases by 2 times, but also gives it an aesthetic appearance.
Before starting to lay slate on the roof or to make the walls, it is necessary to purchase a respirator. It will prevent the ingress of dust that forms when cutting the sheets.
Also, you should know that all sections must be immediately treated with acrylic paint.
Before starting the installation, the asbestos cement sheets are scanned, sorting out the broken sheets and those that have chips.
Nails used for fixing sheets mustbe supplied with a galvanized hat and rubber washer. Immediately scoring them is impossible. First, in the slate, you need to drill holes for them, then gently with the hammer begin the process of fastening.
In the process of laying, so as not to damage the sheets, you can not walk on them. For travel, you need to use special ladders or bridges.
If you adhere to the above recommendations, the installation of asbestos cement sheets will be much easier. We hope, our advice will be useful to you.