Abstract: A prefabricated building structure, comprising: —a first and a second pillar (21, 22) reciprocally stacked and having a preponderant longitudinal extension direction (20); an upper end (211) of the first pillar (21) being located at a lower end (221) of the second pillar (22); —a beam (3) extending substantially horizontally and having a first end (31) located at said upper end (211) and said lower end (221); —reciprocal fixing means (9) for reciprocally fixing the first pillar (21), the second pillar (22) and the beam (3); said reciprocal fixing means (9) being able to be at least partly incorporated in the first pillar (21), in the second pillar (22), in the beam (3). The reciprocal fixing means (9) comprises projecting means (91) and corresponding housing means (92) in which the projecting means (91) fits defining a joint.

Abstract: A pre-compression system for pre-compressing a concrete structure, the system comprising a first tubular element (31) that is expandable in a longitudinal direction and interposed between the first and the second head (21, 22). The first tubular element (31) is movable between a longitudinally elongated configuration, in which a pressurized fluid is placed inside the first tubular element (31), and a contracted configuration, in which said fluid is at least partly removed, the passage from the elongated configuration to the contracted configuration bringing about a compression on the concrete which at least partly envelops the first tubular element (31).

Abstract: A pre-compression system for pre-compressing a concrete structure, the system comprising a first tubular element (31) that is expandable in a longitudinal direction and interposed between the first and the second head (21, 22). The first tubular element (31) is movable between a longitudinally elongated configuration, in which a pressurized fluid is placed inside the first tubular element (31), and a contracted configuration, in which said fluid is at least partly removed, the passage from the elongated configuration to the contracted configuration bringing about a compression on the concrete which at least partly envelops the first tubular element (31).

Abstract: A structural element for constructions comprising a structure (2) made of concrete and/or geopolymer and/or alkali activated material and at least one strip (3) made of a fibre-resin composite. Such strip surrounds at least part of said structure (2), compressing it. The strip also at least partly surmounts an external surface (20) of said structure (2).

Abstract: Structural body comprises a concrete core and a cap around the opening. A first wrap is wrapped under tension around the concrete core and a portion of the cap to form a continuous water resistant barrier around the outer surface of the concrete core. A second wrap can be wrapped under tension around the inner surface of concrete core to form a continuous water resistant barrier around the inner surface of the concrete core. Structural body can be formed as a pipe with a male and female ends to interconnect multiple pipes. The joint formed between two structural bodies has a continuous water resistant barrier that prevents the environment from contacting the concrete core.

Abstract: Structural body comprises a concrete core and a cap around the opening. A first wrap is wrapped under tension around the concrete core and a portion of the cap to form a continuous water resistant barrier around the outer surface of the concrete core. A second wrap can be wrapped under tension around the inner surface of concrete core to form a continuous water resistant barrier around the inner surface of the concrete core. Structural body can be formed as a pipe with a male and female ends to interconnect multiple pipes. The joint formed between two structural bodies has a continuous water resistant barrier that prevents the environment from contacting the concrete core.

Abstract: A structural element for constructions comprising a structure (2) made of concrete and/or geopolymer and/or alkali activated material and at least one strip (3) made of a fibre-resin composite. Such strip surrounds at least part of said structure (2), compressing it. The strip also at least partly surmounts an external surface (20) of said structure (2).

Abstract: A concrete layer having an upper surface and a lower surface, a first fiber layer having longitudinally oriented and radially oriented fiber embedded in the upper surface of the concrete layer, and a second fiber layering having longitudinally oriented and radially oriented fiber embedded in the lower surface of the concrete layer.

Abstract: Post-tensioning wrap with pre-packed fiber tapes in resin is wrapped under tension around a concrete article. Post-tensioning wrap comprising a plurality of fiber tapes each comprising a plurality of tendons separated by a resin. The post-tensioning wrap is then cured or partially cured so that the post-tensioning wrap forms a single, unitary material around the cylinder that is substantially impermeable.

Abstract: The liner includes a rib formation with a transverse section configured to mechanically lock the liner to a concrete shell and a joint to allow the rib formation to flex. The joint for the rib formation can comprise a first side spaced apart from a second side with each joined to the transverse section to allow each side to flex with respect to each other. The space between the first side and the second side can be filled with a weld material to add rigidity to the rib formation while allowing it to flex. Each of the first side and the second side can be combined at the other end to a shell. The combined rib formation and shell are spirally wound to create the liner.

Abstract: A post-tensioning wrap includes a housing having at least one cavity and at least one tendon bonded to the housing. The wrap can be wrapped around the concrete article to equalize compression. Thereafter, a medium is injected into the cavity causing the housing to swell and compression of the concrete article by the tendon.

Abstract: A pallet includes a rigid body that supports a concrete product and a polymer layer that corresponds to a geometry of the concrete product within a predetermined tolerance. One or more flanges with apertures are provided with the rigid body for the polymer layer to attach thereto. The polymer lay can extend outward from the rigid body to form a portion of the dimensions for the concrete product within predefined tolerances.

Abstract: A pallet includes a rigid body that supports a concrete product and a polymer layer that corresponds to a geometry of the concrete product within a predetermined tolerance. One or more flanges with apertures are provided with the rigid body for the polymer layer to attach thereto. The polymer layer can extend outward from the rigid body to form a portion of the dimensions for the concrete product within predefined tolerances.

Abstract: A bell packer comprises of a rotating member combinable to a pallet for rotating the pallet, a vibrator for providing oscillatory motion, and a vibrating member engaged with the vibrator positioned apart from the rotating member for vibrating the pallet. A hopper for storing concrete slurry has an opening to a first auger and a second auger that convey the concrete slurry toward the shaft so that the concrete slurry falls to the center of a mold. A drive assembly comprises of a pair of motors configured for counter-rotation of a pair of concentric shafts with each having a gear and pulley linked by a belt wherein the pulleys are concentric with each other and the counter-rotating shafts.

Abstract: The liner includes a rib formation with a transverse section configured to mechanically lock the liner to a concrete shell and a joint to allow the rib formation to flex. The joint for the rib formation can comprise a first side spaced apart from a second side with each joined to the transverse section to allow each side to flex with respect to each other. The space between the first side and the second side can be filled with a weld material to add rigidity to the rib formation while allowing it to flex. Each of the first side and the second side can be combined at the other end to a shell. The combined rib formation and shell are spirally wound to create the liner.

Abstract: Structural body comprises a concrete core and a cap around the opening. A first wrap is wrapped under tension around the concrete core and a portion of the cap to form a continuous water resistant barrier around the outer surface of the concrete core. A second wrap can be wrapped under tension around the inner surface of concrete core to form a continuous water resistant barrier around the inner surface of the concrete core. Structural body can be formed as a pipe with a male and female ends to interconnect multiple pipes. The joint formed between two structural bodies has a continuous water resistant barrier that prevents the environment from contacting the concrete core.

Abstract: Pallet includes an inner structural support with a bottom section and a top section. The top section has an upward facing, load bearing surface that is bonded with a substantially smooth polymer layer. More specifically, the bottom section includes an annular ring that supports a top section comprising an annular ring and a flange that supports the load. The top section is bonded with a polymer to form a smooth surface suitable for curing concrete.

Abstract: A pallet includes a rigid body that supports a concrete product and a polymer layer that corresponds to a geometry of the concrete product within a predetermined tolerance. One or more flanges with apertures are provided with the rigid body for the polymer layer to attach thereto. The polymer lay can extend outward from the rigid body to form a portion of the dimensions for the concrete product within predefined tolerances.

Abstract: The extruder head assembly comprises of a drive shaft connected to a troweling cylinder. A plurality of rollers are spaced around the drive shaft and above the troweling cylinder and intermittently contact an inside surface as the troweling cylinder is rotated and pulled upward. The rollers are either elliptically shaped or round positioned on an eccentric axis for intermittent contact against an inside surface of the concrete pipe. The rollers compact the concrete mixture to form the outer surface and the troweling cylinder follows the compaction by smoothing the surface. The troweling cylinder comprises a plurality of removable sections. Each section is composed of a plurality of removable and replaceable tile segments. When a tile segment breaks, the section containing the broken tile segment can be removed so that the broken tile segment can be replaced.

Abstract: A post-tensioning wrap includes a housing having at least one cavity and at least one tendon bonded to the housing. The wrap can be wrapped around the concrete article to equalize compression. Thereafter, a medium is injected into the cavity causing the housing to swell and compression of the concrete article by the tendon.