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    PRESTRESSING SYSTEMS AND ANCHORAGES. In concrete structures, prestress is introduced by stretching steel wire and anchoring them against concrete. ... An inner piston in the jack then pushes the plug into the cylinder to grip the wires. 2. Magnel Blaton system: ... After the concrete is set, electric current of low voltage but high amperage is ...

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    This is that set which was assumed to occur in the design calculation of post-tensioning forces immediately after load transfer • AUTS – Actual Ultimate Tensile Strength: The actual breaking strength obtained in tests on a single representative strand or bar. ... A hydraulic pump used to provide hydraulic pressure to the stressing jack ...

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    Post Tensioning Review Session for Installers ... Stressing• Wedge orientation• Gage pressure – What does it mean?• Position of stressing jack• Location and positioning of pump• Eye contact by pump operator• One-way stressing• Two-way stressing• Multiple pulls (stressing) on the same tendon ...

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    System Description - DSI USA

    Such pre-stressing level was ... were less than the ones assumed for design (35%). The steel wedge anchorage system used to anchor the CFRP bar and to react against the hydraulic jack was a resin-free three part system developed at the University of Waterloo, Canada. ... Four-piece Wedge Inner sleeve CFRP Bar. 5 central support. In addition, at ...

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    So to overcome the limitations of old jack, the new jack has to be design in such a way that single ram with hollow ... gripping device is used to fit the strand into the wedge and hence in jack during stressing operation. A releasing ... And inner diameter of cylinder is given by, A=

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    The anchorage, consisting of a set of wedges, a wedge plate (or anchor head), and a bearing plate, is ... it bonds to the tensioned strands and to the inner wall of tendon duct, and thereby allows force ... stressing fixture, the experiments were conducted with a fully-populated but partially-stressed wedge …

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Founded in 2012, Gaode Equipment Co., Ltd. (short:“Gaodetec”) owns the most advanced imported production equipment and complete production technology...

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