Form stones made from colored concrete, used for building walls

摘要

The stone (1) has one end wall (2) which is flat, whilst the roughly rectangular mantle wall (4) has length sides which are not straight due to the presence of numerous depressions. The opposite end wall (3) of the stone has a rough surface and the end wall edges (7, 8) are subjected to mechanical treatment in order to form similar depressions there. The cross-section of the stone at right angles to the stone length axis (11) is also irregular. An Independent claim is also included for a wall built from these stones.