House and renovation
Glue and casein
In what proportions is cellulose glue mixed with water? The mixing ratio of cellulose glue with water depends on the purpose of its use: for priming, the ratio of adhesive to water should be 1:80; for sticking light wallpapers 1:70; for normal wallpapers …
The use of corrugated bitumen sheets – Corrugated sheets are used as a roof covering for single-family houses, holiday homes, in agricultural construction, horticultural and industrial. They are especially useful in places, where there is a high concentration of acids and high humidity, e.g. in industrial buildings …
How pigments differ from dyes?
Pigments, unlike dyes, do not dissolve in binders and solvents. Thus, only pigments are suitable for use in painting materials. However, pigments can be produced from dyes.
What are the relationships between the terms: …
Types of plasterboards:
• Normal construction plasterboards (GKB) – General purpose boards for interiors with a relative air humidity not exceeding 70%, with thicknesses 9,5 or 12,5 mm. You can make tukas from them, whose radius is not less than 60 …
Expanded polystyrene is made of polystyrene, whose granules are expanded (swollen) pentane (pure hydrocarbon) as a foaming agent and heated by steam, what causes, that the pentane volatilizes and expands. A large amount of air is trapped in the pores of the polystyrene, thanks to …
Bucket membranes – High-density polyethylene pressed films are widely used in the installation of heavy insulation (the so-called. bucket ones), which, thanks to the embossing, do not fully adhere to the substrate. So free space created – air ventilation gap - allows moisture to escape …
Adhesives are used to permanently connect the surfaces of elements made of the same or different materials. The durability of the bonded joint is influenced by the forces of adhesion and cohesion. Adhesion is the interaction of the adhesive molecules and the glued element, ensuring adequate adhesion of the adhesive to …
The most commonly used modern wooden and wood-based products:
• Drewno klejone warstwowo – It is obtained by gluing a number of layers with parallel fibers arranged in this way, that the manufactured elements have a solid rectangular cross-section. We distinguish horizontally glued laminated timber (weld planes …
Natural building stone is obtained from rocks: igneous, sedimentary and metamorphic.
Igneous rocks
• Deep sea rocks – They were created from magma cooling down at great depth. The individual components are in the form of crystals visible to the naked eye (granular-crystalline structure).
They belong to igneous rocks: granite, …
Lime is an air binder, obtained by burning limestone or dolomite limestones at a temperature of 950 do 1300°C. It is quicklime. After grinding, it is used in the production of cellular concrete and silicate bricks. Extinguishing (lasing) quicklime is manual …