Abstract: A block suitable for use in an arrangement of blocks that are interlocked. The block may comprise: a first side surface extending between a first edge and a second edge, the first side surface being irregular and having a first half and a second half that are congruent; a second side surface extending between the second edge and a third edge, the second side surface having a first half and a second half that are congruent; a third side surface extending between the first edge and a fourth edge, the third side surface being congruent with a first portion of the first side surface; a fourth side surface extending between the third edge and a fifth edge, the fourth side surface being congruent with a second portion of the first side surface such that the first portion and the second portion of the first side surface constitute the first side surface; and a fifth side surface extending between the fourth edge and the fifth edge, the fifth side surface having a first half and a second half that are congruent.

Abstract: A dry-cast concrete block for use in a structure comprising a plurality of concrete blocks. The dry-cast concrete block comprises three convex sides and three concave sides alternating with the three convex sides. The dry-cast concrete block also comprises a surface located between the three convex sides and the three concave sides and comprising at least one portion having a cast texture with a natural stone appearance. Each of the three convex sides is adapted to register with either one of three concave sides of an adjacent one of the concrete blocks to enable positioning of the dry-cast concrete block in different positions relative to the adjacent one of the concrete blocks.

Abstract: A dry-cast concrete block system for use in a structure. The dry-cast concrete block system comprises a support block comprising a first coupling part and a face block comprising a second coupling part. The first coupling part and the second coupling part enable the face block to be coupled to the support block. The face block comprises a surface adapted to be exposed when the face block is coupled to the support block and the dry-cast concrete block system is positioned in the structure. In one embodiment, at least a portion of the surface has a cast texture with a natural stone appearance. In one embodiment, the structure is a wall and the concrete block system is a wall block system. For example, the wall may be a retaining wall and the wall block system may be a retaining wall block system. In another embodiment, the structure is a column and the concrete block system is a column block system. In yet another embodiment, the structure is steps and the concrete block system is a steps block system.

Abstract: An interlocking block for use in the construction of a mortarless retaining wall wherein a plurality of interlocking blocks are stacked in a number of successive offset courses of blocks, a block in an upper row being in overlapping relation with respect to the joint between blocks in an immediately underlying row. The interlocking block comprises an interlocking member and a block body having top and bottom support surfaces and rear, front and side surfaces.

Abstract: The present invention relates to a block interlock offsetting key for use in the construction of a mortarless retaining wall wherein a plurality of blocks are stacked in offset rows or courses, the blocks of the wall being provided with top and bottom grooves. The block interlock offsetting key is able to interlockingly engage the bottom groove of a block and the top groove of an underlying block so as to offset the blocks a predetermined distance with respect to each other.