Advantages and disadvantages of
asbestos cement sheet Slate is popular with other roofing materials due to its qualities:
- Hardness - withstands human weight;
- Virtually does not heat up in the sun;
- Durability, proven by time;
- Non-flammable, fireproof and fireproof;
- Easily machine-toolable;
- Does not corrode, like a metal roof;
- Has good electrical insulation properties;
- Does not make noise during hail and rain;
- Low cost relative to other materials;
- High resistance to alkaline agents;
- It is easy to repair, you can replace individual sheets.
But unfortunately, like all other materials, it has its drawbacks, although they are insignificant:
- Over time, it can become covered with moss, but to date it can be prevented using special priming agents that enhance water resistance.
- Large weight of asbestos-cement sheets: they are heavier than other materials, so lifting to the roof requires effort.
- Relative fragility, need to be carefully transported and installed.
Technical data for asbestos-cement sheets
This material is divided into two types: flat and wavy sheets. And the sheets are flat, in turn, can be pressed and not pressed. A corrugated sheet is used to construct roofs of public and residential buildings, outbuildings and wall fences of structures and buildings.
Asbestos-cement flat sheet is used as wall panels, partitions, slabs and other structures, as well as for finishing buildings from the inside and outside.
The unpressed and extruded sheets do not look the same. Their difference is that they have different mechanical characteristics - strength and density. Pressed are subjected to additional compaction, and this increases their density, as well as strength characteristics.
The size of the asbestos cement wavy sheet can be 8-wave - 1750x1130 mm, 7-wave - 1750x980 mm. A flat can have the following dimensions: 3000х1500 mm, 2000х1500 mm, 1000х1500 mm, 1750х1200 mm, 1750х970 mm.
Asbestos-cement sheets, the technical characteristics of which will be given below, usually have a gray color, but there are also colored ones. For this, color pigments are added to the initial mass.
| Indices | Pressed flat sheets | Unpressed flat sheets | 7-wave sheets | 8-wave sheets |
| Bending strength, the limit is not less than specified, MPa( kgf / cm²) | 23-( 230) | 18-( 180) | 16(160) | 16-( 160) |
| Density not lower than specified, g / cm³ | 1.80 | 1.60 | 1.60 | 1.60 |
| Impact viscosity not less than specified, kJ / m² | 2,5 | 2,0 | 1,5 | 1,5 |
| Residual strength, not less than specified,% | 90 | 90 | 90 | 90 |
| Frost resistance, no less than specified cycles | 50 | 25 | 25 | 25 |
Application of asbestos-cement sheet
Asbestos-cement sheets wavy, GOST 30340-95, and flat, GOST 18124-95, can be easily processed by tools, so they are considered an excellent option for roofing.
Flat is best used for small buildings, and for complex roofs, a wavy one is more suitable. Both of these materials have almost identical properties, the main of which are refractoriness and increased resistance to the effects of nature.
As for the aesthetic side, the wave sheet looks more attractive and can decorate any construction, from apartment houses to public buildings. Those wishing to receive a reliable and durable coating at an affordable price should pay attention to asbestos-cement products. They will reliably and permanently protect your home from bad weather and maintain a comfortable atmosphere in the house.