Daily Archives: March 7, 2015

Wood-based materials

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 lacquers saponify and become soluble in …

Aluminium

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 …

Coating in the waste water tank

In the tank of the new sewage treatment plant, the built-in and already primed steel elements were intended for painting. About 10% the surface of steel elements shows corrosion. The coating must be resistant to the effects of wastewater with a pH value of 1. Please list the necessary painting activities …

Painting with a roller 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. Also all ... 13.3k views | under Construction
Buildings of the ZL category Buildings of the ZL category According to the division of buildings according to their purpose and method of use, residential buildings, collective residence and public utility and parts of buildings constituting ... 12.7k views | under Architecture
Cast iron and steel in construction Cast iron and steel What is the difference between steel and cast iron? Steel contains less than 1,7% coal, while in cast iron it is 2-4% coal. Carbon content in ... 8.9k views | under Construction
Calculation of escape routes The width of horizontal escape routes is calculated in proportion to the number of people who can stay on a given floor of the building at the same time, assuming at least 0.6 me and 100 people ... 8.3k views | under Architecture
Installation of corrugated bitumen sheets Installation of corrugated plates - The even surface determines the tightness of the cover on the longitudinal and transverse overlaps of the panels. The top surface of the formwork or lat should form the plane of the roof slope ... 6.8k views | under Construction
Concrete reaction The alkaline reaction of the concrete protects the reinforcing steel against corrosion. Where does this alkaline reaction come from?? During the hydraulic hardening of cement, which is a binder in concrete, a significant amount is produced ... 6.7k views | under Construction
Building fire zones The basic assumption for the division of the building into fire zones and the resulting requirements, is to isolate the part of the building affected by the fire, in order to limit the possibility of fire spreading ... 5.5k views | under Architecture
Color cutoff Color cut-off Painting, is it the ceiling, or walls, we always start with the so-called. color cutoff, that is, painting the extreme places, borderline: corners, around the door trims and door frames ... 5.4k views | under Architecture
Metals in construction Metals in construction: • Aluminum is a silvery white metal, lekki, malleable, fusible, well conductive to heat and electricity, corrosion resistant. Used in construction ... 4.2k views | under Construction
Disadvantages of paint coatings Disadvantages of paint coatings The surface of the coating does not always turn out to be like this, what it should be like. Small lumps may appear on it, lumps, pollen. Usually it is ... 3.9k views | under Construction