Constructional component of fireproof material

摘要

The component has at least one side exposed to wear, and particularly from friction, and an area within it with deviating colouring and-or wear resistance. The material (5) of deviating colouring and/or deviating wear resistance extends from the side (6) exposed to wear to or near to the rearward side (7). During the wear, the visible material (5) of deviating colouring and/or deviating wear resistance alters in the side exposed to wear in shape, size, colour, number and/or position. The material of deviating colouring and/or deviating wear resistance has the shape of a strand of constant cross-section, extending from the side exposed to wear as far as or near to the rear side and is arranged inclinedly to these sides. It has a triangular and/or trapezoidal cross-section.