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AssigneeDyckerhoff & Widmann Aktiengesellschaft
InventorsOswald Nutzel, Egbert Zimmermann, Dieter Jungwirth
Estimating the term…
A corrosion-protected tension member, such as a tendon for prestressed concrete with post-tensioning, is made up of a bundle of individual tension elements, such as strands, arranged within a tubular envelope. The tension member extends between anchoring devices, each forming an anchor region for the tension member with a free region located between the anchor regions. In the free region, the tubular envelope is formed of a sheathing tube. Each individual element is located within a separate sheathing duct, and a corrosion-protection mass fills the space within the ducts about the elements. The open volume within the sheathing tube around the sheathed elements is filled with cement mortar. In the anchor regions, the tubular envelope includes an anchor tube enclosing an anchor pot. The anchor pot has a base with openings through which the individual elements pass in a sealed manner. The anchor pot is filled with a corrosion-protection mass. Accordingly, the individual elements are axially movable and retensionable along their entire lengths. The sheathing ducts and the anchor pot separate the cement mortar from the individual tension elements in the free region extending between the anchor pots.
Corrosion-protected tension member, such as a tendon for prestressed concrete with post-tensioning, comprising at least one axially extending steel tension element located within a tubular envelope, and with an anchoring device having an abutment member at each end thereof, said tension element has an anchor region where it is connected to said anchoring device and a free region extending between the anchor regions, said tubular envelope comprises a sheathing tube in the free region of said tension member connected in the anchor region to said anchoring device, said tubular envelope enclosing an open space around said tension element and said open space filled with a plastically deformable corrosion protection mass in the region directly adjacent to said anchoring device, wherein the improvement comprises that said tension member comprises a plurality of axially extending tension elements and each said tension element is located within a separate sheathing duct formed of a plastics material located within said sheathing tube and with a space located within said sheathing duct around said tension element and with said space within said sheathing duct filled with a plastically deformable corrosion-protection mass, said open space within said sheathing tube exteriorally of said sheathing ducts and extending between the anchor regions being filled with a hardenable material, said tubular envelope in the anchor regions comprises an anchoring tube located within an opening in the abutment member and extending from said abutment member toward the free region of the tension member and being filled with hardenable material, an anchoring pot located within said anchoring tube, said anchoring pot comprises annular side walls spaced inwardly from the anchoring tube wherein the hardenable material extends into the space therebetween and a base at its end more remote from said abutment member having a plurality of openings corresponding to the member of tension elements, and said anchoring pot being filled with a plastically deformable corrosion-resistant mass wherein the tension elements extend between and through the anchoring pots.
Dependencies are inferred from the claim text.