Artificial aggregates are obtained from heat-treated rocks and industrial waste. The use of a specific type of artificial aggregate depends to a large extent on their production in a given region of the country.
Criteria for the division of artificial aggregates:
1. They …
As standard, SILKA E blocks are manufactured in very high strength classes -15 i 20 MPa. Such a high compressive strength causes, that when bricking the structural walls of a building with a thickness of SILKI E 24 cm, we can erect even 12-story buildings without additional …
Plasterboard
As can be said, whether the plasterboards can be used in rooms with high air humidity, no risk of damage?
Building plasterboards are suitable for rooms with high air humidity, type B, impregnated (abbreviation GKBI). These boards are intended for …
Open fireplace – A fire is kindled on a non-flammable surface. The exhaust gases are rising, they accumulate in the collective collector and are discharged to the chimney, which in turn must pull them out. An open fireplace places particularly high demands on the chimney. They condition …
On fire protection of buildings, other buildings and areas in high and high-rise public utility buildings and collective residence, it is required to use a fire alarm system and sound warning system. A fire alarm system is understood as an installation, covering devices …
Building, in which the loss of voltage in the electric supply network may pose a threat to human life or health, it should be powered from at least two independent ones, self-switching on sources of electricity and equipped with self-switching emergency lighting (security and …
Painting with a roller.
Wide paint rollers are used to paint walls and ceilings 18-25 cm, covered with natural fur, often screwed onto extensions of various types. All corners can also be painted with a suitable roller: with a special fur coat, with fur shaped according to the shape of the corner, be …
The materials of the light wood wool boards contain cement as a binder. In combination with water contained in humid air, cement gives a strongly alkaline reaction. It makes it, that alkyd varnishes are saponified and become water-soluble.
Veneered interior doors have …
Aluminium
Why aluminum can be anodized and what is it about? Anodized aluminum is an electrically oxidized aluminum. An oxide layer is electrochemically deposited on the aluminum surface, increasing the resistance of this surface. At the same time, different colors can be obtained by anodizing.
Large aluminum windows …
A different solution from the one discussed above are the multi-plane dampers. They allow the use of knees, arches and offsets right behind the hatch. However, pay attention, that the multi-blade fire dampers currently available on the Polish market are made of steel sheet. In relation with …