Specifications of thermal blocks
For production of thermal blocks of PSV-S type polystyrol (foaming-self-damping expanded polystyrene foam) of leading world manufacturers from Korea, Germany, and Poland is used. By its physical and mechanical properties this polystyrol outstrips by far domestic equivalents.
PSV-S does not contain chloro-fluocarbons or incompletely halogenated chloro-fluocarbons. It is an environment-friendly material is not harmful for human body used of production of disposable tableware, package for food products and the like.
Expanded polystyrene foam burns under the influence of a quite strong heating source. However, in a house there are always many materials capable of inflame at lower temperatures as compared with expanded polystyrene foam, which is reflected in the table given below.
Besides, to reduce the possibility of accidental inflammation all articles made of polystyrol PSV-S contain flame-proof additives, which are added at production.
Such special additives help to prevent inflammation of the material from small fire sources, such as, for example, matches or lit up cigarettes. It is an important factor of fire safety.
| Name | Row block/edge block ПСВ-С 25 | Row block/edge ПСВ-С 35 | Collapsible block |
| Density of polystyrene foam | 25 kg / m cu. (М25) | 35 kg / m cu. (М35) | 35kg / m cu. (М35) |
| Geometric dimensions | 250х1000х250 mm | 250х1000х250 mm | 250х1000х250 mm |
| Thickness of the polystyrene foam walls | 2шт.х50mm | 2шт.х50mm | 2шт.х50mm |
| Internal distance between the walls of the polystyrene foam | 150 mm | 150 mm | 100 mm -300 mm |
| Thermoblock weight | 0,5 kg | 0,75 kg | 1,4 kg |
| Lintel weight | - | - | 0,09 kg |
| Concrete consumption | 0,13 cubic meter/m2 | 0,13 cubic meter/m2 | 0,15 cubic meter/m2 |
| Weight of the wall | 360 kg / m sq. | 360 kg / m sq. | 415 kg / m sq. |
| Thermal conductivity coefficient | 0,037 W/m∙K | 0,038 W/m∙K | 0,038 W/m∙K |
| Steam permeability | 0,032 mg/(m.h. Pa) | 0,032 mg/(m.h. Pa) | 0,032 mg/(m.h. Pa) |
| Moisture absorption (in 24 hours) | 0,5 % | 0,5 % | 0,5% |
| Self-extinguishing time | 2 sec | 2 sec | 2 sec |
| Combustibility group | Г1 | Г1 | Г1 |
| Acoustic insulation | 46 db | 46 db | 46 db |
TABLE 1. INFLAMMATION TEMPERATURE OF TRADITIONAL HOUSEHOLD MATERIALS.
Description | Temperature of inflammation that occurred as a result of a burst of flame, ˚С * | Auto-ignition temperature, ˚С ** |
Paper | 220 | 230 |
Pine needles | 228-264 | 260 |
Cotton | 230-266 | 254 |
Wool | 200 |
|
PVC | 391 | 454 |
Polystyrol | 345-360 | 488-496 |
Expanded polystyrene foam | 346 | 491 |
* Temperature of inflammation that occurred as a result of a burst of flame is the temperature, at which are formed vapours, which, when mixed with air, may inflame from an external flame source.
** Auto-ignition temperature is the temperature at which material smoldering or inflammation occurs without any external flame source.
All organic chemical materials, including plastic, wood and paper, wool and cotton, release various toxic products, including carbon oxide, when burning. At fire it is the most dangerous gas. Burning of the above-listed organic materials may also result in oxygen deficiency. Knowledge of the chemical composition and structure of organic materials provide grounds for understanding reasons of smoke formation and toxic gases at burning. The majority of materials subject to inflammation contain carbon, therefore at burning they oxidize and release carbon dioxide (СО2). If the oxidizing process is not complete enough carbon oxide (СО) is released. The concentration CO in air equal to 0.3% or 3000 PPM (parts per million) at exposure to it within 30 minutes is dangerous for human beings. Polystyrol heated to 300 ˚С releases 10 РРМ of carbon oxide only ; up to 400 ˚С –50 РРМ only; up to 500 ˚С –500 РРМ only; and when heated up to 600 ˚С it releases 1000 РРМ of carbon oxide.
Taking into account the mentioned above parameters, one can easily testify safety of our products, as well as safety if expanded polystyrene foam as a whole.