Tensioning and bonding pre-grouting prestressed tendon: Fid-Bau Portal

Tensioning and bonding pre-grouting prestressed tendon

The invention provides a tensioning and bonding pre-grouting prestressed tendon, and relates to the technical field of post-tensioned prestressed concrete structures. The tensioning and bonding pre-grouting prestressed tendon comprises a steel strand and a sheath, and the outer side of the steel strand is coated with a retarding adhesive; and the sheath sleeves the outer side of the steel strand coated with the retarding adhesive, and a plurality of curing agent capsules are arranged between the sheath and the steel strand. The curing agent capsules are arranged in the sheath, when the prestressed steel strand is tensioned, the curing agent capsules and the sheath can displace, the curing agent capsules can be extruded and broken by the sheath, curing agents in the curing agent capsules flow out to promote curing of a delayed coagulation adhesive, so that the prestressed steel strand and concrete work together, and a bonded prestressed structure is formed.

本发明提供了一种张拉粘结预灌浆预应力筋，涉及后张预应力混凝土结构技术领域，包括：钢绞线，所述钢绞线的外侧涂覆有缓凝粘合剂；护套，所述护套套装于涂覆有所述缓凝粘合剂的所述钢绞线的外侧，所述护套与所述钢绞线之间设置有若干固化剂胶囊。本发明在护套内部设置有固化剂胶囊，在预应力钢绞线张拉时，固化剂胶囊与护套会出现位移，固化剂胶囊能够被护套挤压破裂，固化剂胶囊中的固化剂流出，促进缓凝粘合剂固化，使得预应力钢绞线与混凝土共同工作，成为有粘结预应力结构。

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