Patent ID: 7056463

Claim:
A post-tension method for manufacturing a pre-stressed concrete member, which comprises the steps of: holding continuous carbon fiber filaments parallel to each other; preparing a carbon fiber cable by bonding said carbon fiber filaments at positions along a longitudinal direction; bonding or forming burial anchors near both ends of said carbon fiber cable; attaching temporary anchors to both ends of said carbon fiber cable outward of said burial anchors; inserting ends of said carbon fiber cable including said burial anchors in a sheath; setting said carbon fiber cable within said sheath in a molding box; pouring green concrete in said molding box; hardening said poured concrete to a concrete member, in which said carbon fiber is molded; pouring grout in said sheath under the condition that said carbon fiber cable is stretched by pulling said temporary anchors in a longitudinal direction; and releasing said carbon fiber cable from tension after said grout is hardened in said sheath.