Abstract: All elements are designed in a modular manner on the base of a unitary length. They include elements comprising more than one square having side lengths a and a camfered edge b at an angle of 45.degree.. The elements, which can be produced in the form of paving stones, or thin ceramics tiles, or trough stones and can be laid out to create floor or wall coverings, allow to lay out all letters, numbers or common symbols, as well as a great variety of other figures, and to provide them with straight-lined borderings without the need of breaking, grinding or otherwise altering a single element. It is understood that said elements can be differently colored in order to emphasize them.

Abstract: A set of masonry blocks comprises a rectangular basic block having a basic length dimension L, a width B and a height H and including lateral end sides comprising a joining portion including a recess which defines a portion of a first cylinder, and being adapted to contact adjacent masonry blocks at matching joining portions thereof. The set further includes rectangular end blocks one lateral end side of which comprises a joining portion identical to the joining portion of the basic block, and another lateral end side of which comprises a closed masonry-wall termination surface.

Abstract: A concrete paving stone adapted to be disposed in circular and elongate paving configurations. The paving stone includes at least two side walls and a substantially planar upper face, each of the side walls being an arched side wall and including an elevated face at a center region thereof which comprises an abutting surface and two associated wedge surfaces adjoining the abutting surface on both sides thereof. The associated wedge surfaces extend from the abutting surface to an associated arched side wall. The elevated face further extends across a substantial portion of a length of the associated arched side wall and is effective for creating a fixed abutment between adjoining arched side walls of adjoining paving stones in a paving configuration.

Abstract: A paving stone configured to be arranged in a paving stone bond in an area-covering grid-shaped lattice of paving stones comprised of lattice elements. The paving stone has side walls and includes a plurality of spacers disposed on the side walls thereof. Each of the spacers has an abutting surface adapted to be positively joined to a respective abutting surface of a spacer on an adjacent paving stone in the lattice of paving stones. In this manner, a crossing joint is formed between the paving stones. The abutting surface of each of the spacers includes a stepped contour for positively meshing with a corresponding stepped contour on the respective abutting surface of the spacer on the adjacent paving stone, the plurality of spacers being disposed on the side walls of the paving stone such that the stepped contours of their respective abutting surfaces are identically oriented in either of two rotational directions defined around the side walls of the paving stone.

Abstract: The side surfaces of compound stones are provided with relatively flat elements which interlock with little play when said stones are laid out, while adjoining side surfaces of neighboring stones are in contact along two lines only. A compromise between a sufficient mutual securement of the stones and a certain mutual mobility thereof is thus obtained. In particular, a certain tilting of neighboring stones with respect to each other is possible, whereby it is possible to produce pavements in uneven places.