Warm airtight walls are the first link in the technological chain, the basis of the Passive House concept is the saving of thermal energy, which is easiest to implement thanks to well-chosen construction material and well-insulated external walls of the building. Współczynnik przenikania ciepła U dla …
Author Archives: lore
Plastic substrates
Within plastics, a distinction is made:
1) plastomers – termoplasty i duroplasty (thermosetting and chemically setting);
2) elastomery.
The production of plastics is based on two types of chemical reactions. As a result of them, macromolecules are formed from small monomer molecules. What are these …
Wood for windows and pests
Wooden window profiles should be made in a way that ensures water drainage. What minimum angle of inclination is required here?
The minimum angle of inclination of the window profiles is 15 °, an angle of 30 ° is preferred.
To ensure a sufficiently thick layer of coating on the edges of window profiles, all …
Sand-lime brick
Sand-lime brick
What properties should a lime brick wall have–sand, if it is intended to be covered with a permanent coating?
The substrate should be firm, clear, with no scratches, seek, free of efflorescence and foreign bodies.
What are the disadvantages of a sand-lime brick facade? …
Brick and clinker
Brick and clinker
What is the difference between clinker and ordinary brick?
Bricks are made of clay and loam, with or without slimming admixtures, and then burns out. A distinction is made between the facing brick and the brick used on the inside. Only facing brick …
Door painting
Previously painted steel doors in stock are to be repainted. The old coating is made of lacquer on alkyd resins. The study showed, that approx. 65% the coating comes off. Please list and justify the necessary painting activities.The steps are as follows:…
Boiler room renovation
The fuel oil tank in the boiler room is to be painted with an oil-resistant coating on the inside. Plaster, made of mortar from the PIH group, is new. A concrete floor was made on the floor, which has no signs of damage.
a) How high must the plinth be painted?
b) …
Scale on plaster
In the new building, the ceilings and walls are to be painted with washable dispersion paints. Scale was found on the plaster on wetting and scraping off the coating. Please list the steps performed while applying the coating and justify the technology of implementation
The steps for painting walls and ceilings are …
Injection concreting
Injection concrete is known in the country under the names: "colcret", "Polcret" or "prepact - concret". The method of its execution consists in filling the mold with a thick aggregate constituting the concrete skeleton, that is, about the diameters 40 do 80 mm, and then injecting voids in this …
Concreting using a floating form
Concreting using a floating form – It is a technique similar to the slide concreting method, invented by the Swedish company Ab. Hydro Concrete. The concrete mix is poured continuously in a floating manner, a sealed form with a prefabricated bottom. The concrete level rises and …