Title: Reactive Powder Concrete Anchorage, for Post-Tensioning with CFRP Tendons
Author(s): Ehab Shaheen and Nigel Shrive
Publication: Materials Journal
Appears on pages(s): 436-443
Keywords: compressive strength; curing; fiber-reinforced concrete; polymer; prestressed concrete; silica fume; tendon; wrapping
A nonmetallic anchorage for carbon fiber-reinforced polymer (CFRP) tendons, made from a specially developed ultra high-performance concrete (UHPC), was described. The UHPC anchorage system, however, was too large for use on site (120 mm [7.9 in.] diameter x 180 mm [7.1 in.] long). A smaller anchor of tougher material, requiring less wrapping of the barrel, was needed for use on site. A new reactive powder concrete (RPC) anchorage consisting of a CFRP-wrapped barrel and four wedges has therefore been developed. The system is similar in size to standard steel anchorage. Specimens were cast and tested with CFRP tendons to determine if the new system could meet the Post Tensioning Institute (PTI) test requirements.