Clinker and bricks - where is the difference?

Some even call simple bricks "clinker", conversely many real clinker bricks simply call "bricks". What exactly are bricks, and what is really real clinker, and in what characteristics are different both, read in this post.

Production method of clinker

Clinkers are fired at particularly high temperatures and usually much longer than bricks. The effect of the high firing temperatures over a long period of time causes the surface of the stone to "sinter" during the firing process:

This means that the surface of the stone begins to change under the effect of high heat. The pores close as the particles expand within the surface. The result is a "densely sintered" very hard surface. Sintering could also be explained as "caking".

In this sintering of the surface during production lies the most important difference between bricks and real clinker. The densely sintered surface makes the clinker impermeable from the outside - which is not the case with bricks. On the contrary, its surface is relatively sensitive to moisture and can crumble and crumble on prolonged exposure to high humidity.

Starting materials

The starting materials for bricks are usually only clay minerals and (clay) loam. For clinker, on the other hand, feldspars or chamotte are used as starting materials. If clay is used, then usually only so-called "blue clay" with a significantly higher amount of aluminosilicates than conventional bricks.

This also results in the higher firing temperature (in practice around 1,200 ° C), which is necessary anyway because of the high silicon content for firing. However, the firing temperature is always adjusted exactly to the composition of the starting material, since the surface, while sintering, but the Matter not too strong soften dar.f.

Different standards

Clinkers are subject to different standards than bricks. For clinker in Germany, the DIN 105-Part 4, the solid clinker and ceramic Hochlochklinker describes. For bricks, which are to be counted to the bricks, however, the remaining parts of the DIN 105 and / or the DIN EN 771 apply as a successor document.

Even with the clinker there are - as with bricks - standard sizes, and the joint width when bricking clinker is firmly prescribed. The sizes, however, are different

Tips & Tricks Never change real clinker with straps made of sand-lime brick (KS facing bricks, mostly white and used on facades). Sand-lime bricks are not water-impermeable, but highly absorbent and must be protected accordingly (impregnation).
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