Daily Archives: February 7, 2015

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, from small molecules of monomers are formed …

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:…