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Construction polystyrene foam PSB-S
What it is?
Expanded polystyrene PSB-S 25 in original packaging.
Before us is PSB-S, which means “suspension pressless self-extinguishing polystyrene foam.” Foamed plastics are used very widely in various fields of human activity. In construction, polystyrene foam or simply polystyrene foam is most often used , since this material most fully corresponds to the tasks assigned to it.
Expanded polystyrene is most often used in construction.
Due to the foamed cellular structure, polystyrene foam has very low thermal conductivity, so its main function is thermal insulation of various structures . Depending on the brand and qualities of a particular material, the scope of its application also changes.
Insulation of walls and other parts of buildings is the main function of PSB-S.
Expanded polystyrene was invented a long time ago, and during this time a lot of methods for its production and, accordingly, varieties were invented.
The most famous are:
- Pressless suspension . This is PSB, EPS. Known for the brands “MOSSTROY 31”, “NovoPlast”, “ET-Plast”.
- Extrusion . This is EPS, XPS. Known for the brands Penoplex, TechnoNIKOL, URSA, Knauf.
- Press . This is PS1 – PS4. Known for a variety of imported brands. Used extremely rarely.
- Autoclaved . This is Styrofoam. Known as a product of the Dow Chemical Company.
- Autoclave extrusion . There are no examples of this material on the domestic market.
Why do buyers choose this brand of foam?
Packaging of self-extinguishing polystyrene foam PSB-35.
I will not list the advantages of polystyrene foam as insulation. Those interested can familiarize themselves with them in my other articles on the site. I would like to highlight the differences specifically in the 35th PSB-S.
Another example of PSB-S products.
In short, we can say that this is in a sense a universal material that will suit:
- for wall insulation;
- will not be “afraid” of the foundation or septic tank;
- and can also be used to insulate floors inside an apartment or house.
This is a kind of substitute for an extrusion machine, but cheaper.
Do-it-yourself thermal insulation of the base.
The strength of these sheets is sufficient for use in the construction of heated roads and parking lots, runways, protection of soils from swelling, strengthening of slopes, etc. The instructions allow you to use PSB-S of the thirty-fifth series for these purposes, although personally I would play it safe and buy a PSB-S-50.
In regions with harsh climates, the material can be used on walls.
POLYSTYRENE FOAM PROPERTIES
Polystyrene foam (expanded polystyrene, styrofoam) was invented in 1951 by BASF, and for many years foam insulation has been widely used due to its remarkable properties.
Polystyrene foam is economical. For example, mineral wool boards with similar compressive strength are much more expensive.
Polystyrene foam is an affordable, effective insulation material. In Moscow you can buy polystyrene foam from several manufacturers. Buying polystyrene foam in other regions is also not a problem.
Polystyrene foam has excellent thermal insulation and sound insulation properties.
Sheet foam can be used in any type of construction. Insulation with foam plastic can be carried out on almost any building structure: walls, roofs, floors, ceilings, foundations. Polystyrene foam is used in the construction of interior partitions.
Polystyrene foam is durable.
Polystyrene foam is frost-resistant.
Polystyrene foam does not absorb moisture.
Polystyrene foam is an absolutely environmentally friendly insulation material.
Polystyrene foam is easy to use. When working with foam plastic, there is no need to use skin and respiratory protection. For short-term storage at a construction site, foam plastic can be stored in stacks of any height in the open air at any time of the year.
How to determine density yourself
It is important to be able to protect yourself from unscrupulous manufacturers.
As we can see from the list of physical characteristics, such an important indicator as density varies in a fairly large range, from 25 to 35 kg/m³.
If 25-gauge foam is perfect for insulating walls, then for floor insulation you need at least 35-gauge. In this regard, as well as the dishonesty of many manufacturers, it is advisable to be able to find out the real density of the foam.
Visual inspection before purchase is required.
This is not difficult to do. It is necessary to weigh a sheet of polystyrene foam, preferably on an electronic scale, since it is light and large errors will negate all our efforts. Let us denote the weight of the sheet with the letter “m”. Let's say our sheet weighs 1200 grams, convert it to kilograms and get m = 1.2 kg.
We don't need pharmacy precision, so we can use a kitchen scale with an accuracy of up to a gram.
Next we need to determine the volume of the sheet. To do this, multiply its length (for example, 1 m) by its width (for example, 0.5 m) and by its thickness (for example, 0.1 m). We get the volume V = 1 x 0.5 x 0.1 = 0.05 m³.
Now we determine the density using the formula:
Formula for calculating the density of a substance.
Density is 1.2/0.05 = 24 kg/m³.
If you bought material with grade 35, look at GOST 15588-86 and make sure that you were deceived, since PSB-25-S has this density characteristic.
Characteristic values according to GOST.
PPS PSB-25-S is most often used for wall insulation.
You can be sure that you are using material with the density that corresponds to the calculations. After all, if you are insulating a critical facility, and the specific gravity of the insulation, according to the documentation, must be at least 32 kg/m³, then the PSB-35-S foam plastic you purchased can have a specific gravity of one cubic meter equal to, say, 28 kg on completely legal grounds.
