Post-tensioning anchorages for aggressive environments

An anchorage mount for mounting an anchor plate having a wedge-gripper cavity and a front connection means to a form, comprising:

• (a) a spindle, comprising:
• (i) a threaded shank;
• (ii) a flange connected coaxially to the shank, which flange cooperates with the anchor plate front connection means to grip the anchor plate to form a seal to prevent cement from entering the wedge-gripper cavity of the anchor plate;
• and
• (iii) a nose formed coaxially on the shank which forms a surface for cooperating with the anchor plate wedge-gripper cavity to prevent that passage from becoming occluded;
• (b) a pocket form removably mounted on the shank for forming a pocket in the structure to be post-tensioned so that the anchor plate and the tendon strand may be accessed after the structure is in place;
• and
• (c) a follower for receiving the threaded portion of the spindle shank and securing the shank, pocket form and anchor plate to the form.

An intermediate anchorage for a sheathed tendon, comprising:

• (a) an anchor plate through which a tendon strand may pass, comprising:
• (i) a generally cylindrically shaped body with a front end and rear end which body forms a wedge-gripper cavity that opens in the front end and a strand passage that opens in the rear end and communicates with the wedge-gripper cavity;
• (ii) a bearing plate which extends radially from the body adjacent to the front end;
• (iii) a front annular connection lip which extends from the front end of the body, which is oriented coaxially with the wedge-gripper cavity and the strand passage, and which contains a thread on its inner annular surface to receive another threaded member in a sealing relationship;
• and
• (iv) a rear cylindrically shaped connection lip which extends from the rear end of the body and which forms an interior and an exterior cylindrically shaped surface, the interior surface forming part of the strand passage and the exterior surface for receiving in a sealing relationship a connector which surrounds the tendon strand and protects it from moisture;
• (b) a tubular shaped first connector having a flared front end connected to the rear connection lip of the anchor plate in a sealing relationship and a rear end connected to the tendon sheathing in a sealing relationship;
• (c) an adaptor, comprising:
• (i) a generally cylindrically shaped body with a front end and a rear end which body forms a strand passage between the front and rear ends;
• (ii) a connector flange which extends radially form the rear end and which includes a threaded portion connected to the front connection lip of the anchor plate in a sealing relationship;
• (iii) a front genernally cylindrically shaped connector lip formed by the body having an interior surface which forms part of the strand passage and an exterior surface for receiving in a sealing relationship a connector which surrounds the tendon strand and protects it from moisture;
• and
• (d) a tubular shaped second connector having a flared rear end connected to the front connector lip of the adaptor in a sealing relationship and a front end connected to the tendon sheathing in a sealing relationship.