Abstract: An insert with a hole running through its center for a fastening connector to pass through. The self-centering sealing insert in FIG. 1a, has a central hole (pos. 1.1) running through its inner part for the passage of a fastener. Its body is made in the form of two identical truncated cones (pos.1.2 and pos.1.3) combined with their large bases in the center of the body, which tapers to the edges where a central hole is formed; and the truncated cone is part of a right circular cone formed by rotating a rectangular trapezoid around its side with a height of H (FIG. 1c) perpendicular to the bases of the trapezoid; while the radius of the larger base R1.2 is greater than the radius of the smaller base R1.1 so that the value of the angle ?, which is formed by the plane between the two bases of the truncated cones and their tapering sides, is in the range from 1 to 89.

Abstract: This invention relates to the building art, and more particularly to blocks for the construction of buildings, structures, and hardscaping items, and to a method for assembling building blocks without using mortar. A building block, configured as a parallelepiped, comprises three pairs of opposing faces, including four lateral faces and two faces constituting an upper and a lower bases, each of the faces including a plurality of elements constituting projections and recesses, wherein each of the elements is shaped as a regular pyramid with rounded edges, and the pyramid vertex angle between two opposing faces is within the range from 90 to 179.9 degrees.

Abstract: Building blocks for mortarless brickwork and construction of houses, buildings, structures and hardscaping items are disclosed herein. According to the first variant the building block made in a form of polygon on each vertical and each horizontal face of which the response projections and recesses are made, coming into engagement with the projections and recesses of adjacent blocks. The projections and recesses are made in truncated cone form, along the axis of which in this block intercommunicating channels are made. According to the second variant on the faces of the building block only recesses are made in it in a form of cylinders and/or truncated cones, along the axis of which in the block the channels are made. At least, in some of the indicated recesses the fastening elements in a form of discs are installed, at both sides of which along the axe the bars, fixed in the indicated channels of the adjacent blocks are fastened.

Abstract: This invention relates to the building art, and more particularly to blocks for the construction of buildings, structures, and hardscaping items, and to a method for assembling building blocks without using mortar. A building block, configured as a parallelepiped, comprises three pairs of opposing faces, including four lateral faces and two faces constituting an upper and a lower bases, each of the faces including a plurality of elements constituting projections and recesses, wherein each of the elements is shaped as a regular pyramid with rounded edges, and the pyramid vertex angle between two opposing faces is within the range from 90 to 179.9 degrees.