Polished concrete is concrete that has been processed through a series of mechanically ground "polishing/grinding" steps similar to the production of terrazzo. This process also includes the use of a penetrant chemical known as a hardener. The concrete densifier/hardener penetrates into the concrete and creates a chemical reaction to help harden and dust proof the surface.
The treated surface has small craters 1-3 mm in depth and width uniformly distributed, which add to the overall tone of the rock. It should be noted that these “bumps” on the size and density of the pointer are a factor of implementation, as is the force used and the number of impacts. In the case of very large bujardas the finish is quite rough, but usually these points are used to shape a surface.
In Several types of bujardas, depending on the number and size of the tip, produce a fine or coarsely granulated surface. Another factor that determines the surface roughness is the strength and repetitions. Bushhammering is a more traditional finish because knocking is applied repeatedly with a tapping bujarda going to leave the surface with the desired texture.