Glass – direct radiation
A house using direct radiation should act as a sun catcher. The sun's rays should penetrate to its interior as much as possible and be absorbed there …
Author: Strand
Renovation of a concrete sewage settling tank
The concrete sewage settling tank is to be renovated. A poorly adhering cement grout was found on its inner surface. Expected loads: sewage temperature in summer approx. 313 K …
Pigment properties
What pigments are not suitable for silicate paints and why?
The following pigments are not suitable for silicate paints: chrome yellow, chrome green, zinc yellow, green …
Renovation of the staircase
On the ceiling of the staircase, various layers of paint that were difficult to dissolve in water were found. A new painting of the ceiling with a washable dispersion paint is planned. Please list the necessary steps and justify the proposed solutions…
Development of "solar" architecture
The development of "solar" architecture until the period of the oil crisis in the years 1973 —1974 was slow going. Experimental houses were built, mostly in the USA, as well as in France and England. The first "solar houses" …
Wallpaper properties
What is the standardized light fastness of wallpapers:
a) with sufficient light fastness?
b) with good lightfastness?
Wallpapers with sufficient light fastness must have an 8-degree rating …
Paint additives – siccatives
What are siccatives?
Siccatives are substances that accelerate drying. They are added during production to oil paints, varnishes and paints based on alkyd resins to accelerate curing by …
Concrete floor repair
What basic problems should be considered before starting works related to the repair and strengthening of the concrete base.
When planning the repair and reinforcement of concrete elements, must be established first:
1. What defects …
What topics are discussed in the course for electrical qualifications?
What topics are discussed in the course for electrical qualifications?
In a month or two, she plans to go to an electrical license course, the so-called SEP entitlements. I want to go without it …
Windows – thermal insulation
The conviction has become established, windows are the weakest point in the housing in terms of thermal insulation. The heat transfer coefficient k for windows is much higher than for solid walls.
co-factor …