Bonded Post Tensioning

Bonded post tensioning systems are comprised of tendons from one(mono) to multiple strands. For bonded systems the prestressing steel (STRANDS) is encased in a smooth galvanised iron (GI)flat tubes (DUCTS). Concreting is carried out, and once sufficient strength is achieved by the concrete the compressive stresses are introduced to the concrete by applying force (STRESSING) to the strands. Cementitious grout is then injected into the GI ducts to form a bond, (GROUTING).