Abstract: A post-tensioning anchor is configured for use in a structural element formed by surrounding the post-tensioning anchor with concrete, wherein a portion of the structural element surrounding the post-tensioning anchor comprises a concrete block. A post-tensioning anchorage zone, defined by the concrete block and the post-tensioning anchor, is configured to withstand an applied compression and an applied tension from a predetermined post-tensioning force without regard to reinforcement in the concrete block at the anchorage zone, such that the anchorage zone is configured to transfer the predetermined post-tensioning force to a remainder of the structural element without regard to reinforcement in the concrete block at the anchorage zone.

Abstract: The present invention concerns a concrete strip, the strip comprising conventional concrete and a combined reinforcement of both post-tension steel strands and fibers, said post-tension steel strands—having a diameter ranging from 5 mm to 20 mm, —having a tensile strength higher than 1700 MPa, said fibers being either steel fibers and being present in a dosage ranging from 5 kg/m3 to 90 kg/m3 or being non-steel fibers and being present in a dosage ranging from 0.6 kg/m3 to 25 kg/m3, whereby the strip has a thickness, whereby further the length of the strip is according to the formula:length of the strip>30×strip thickness.

Abstract: The present invention concerns a concrete slab resting on at least two supports, the slab comprising conventional concrete and a combined reinforcement of both draped post-tension steel strands and fibers, said post-tension steel strands—having a diameter ranging from 5 mm to 20 mm, —having a tensile strength higher than 1700 MPa, said fibers being either steel fibers and being present in a dosage ranging from 10 kg/m3 to 75 kg/m3 or being macro-synthetic fibers and being present in a dosage ranging from 1.5 kg/m3 to 9.0 kg/m3, whereby the slab and the supports are fully connected, partially connected or fully disconnected.

Abstract: A post-tensioning anchor is configured to post-tension at least one tension steel element. The post-tensioning anchor includes a force transfer unit configured to transmit prestressing force into a surrounding concrete substrate and at least one steel member configured to resist an anchoring force by the at least one tension steel element on the force transfer unit. The force transfer unit is made of concrete.

Abstract: A concrete slab (20) comprises conventional concrete and a combined reinforcement of both post-tension steel strands (22, 26) and fibres (29). The post-tension steel strands (22, 26): —have a diameter ranging from 5 mm to 20 mm, —have a tensile strength higher than 1700 MPa. The fibres (29) are present in a dosage ranging from 10 kg/m3 to 40 kg/m3 in case of steel fibres are in a dosage ranging from 1.5 kg/m3 to 9 kg/m3 in case of macro-synthetic fibres.

Abstract: Systems and methods are provided for securing ends of tendons in an anchor housing. Tendons having open or expanded sections are inserted through a cylindrical surface of the anchor housing. The tendons are secured in the anchor housing by grout which cooperates with the open or expanded sections and irregularities formed on the interior surface of the anchor housing.

Abstract: Systems and methods are provided for securing ends of tendons in an anchor housing. Tendons having open or expanded sections are inserted through a cylindrical surface of the anchor housing. The tendons are secured in the anchor housing by grout which cooperates with the open or expanded sections and irregularities formed on the interior surface of the anchor housing.