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    Products and Services for Prestressed Concrete, Cable Stay, Mining, Geotechnical, Barrier Cable and Encapsulated Systems ... – Pulling wedges ... Shown left to right: F5PF, F5CA, F5CHR, F500SL2 and F5TCAF5PF, F5CA, F5CHR, F500SL2 and F5TCA Tensioning Jacks proven hydraulic tensioning jacks for both mono-strand and multi-strand applications ...

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    Hydraulic Jacks; Hydraulic Pumps; Rolling Machine ... Tianjin Sunwin Prestressed Technique Co.,Ltd is located in Xiqing Economic and Technological Development Area of Tianjin city,China mainland .We are a professional manufacturer specialized in Kinds of post tension systems,prestressed concrete Anchor,PC Strand,PC Wire,Post tension equipment ...

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    Small Presentation on "Prestressed Concrete". ... Post-tensioning cable ends extending from freshly poured concrete 5. Hydraulic Jack are used to pull the Cables ... Concrete • The major problem with prestressed concrete is that it needs specialised construction machineries like jacks anchorage etc. • Advanced technical knowledge and strict ...

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    China Concrete Hydraulic Jack for Single Hole Post Tension Wedge Anchorage, Find details about China Mono Strand Jack, Stressing Jack from Concrete Hydraulic Jack for Single Hole Post Tension Wedge Anchorage - Henan Prestressing Equipment Co., Limited

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    Stressing of prestressed concrete is acknowledged to be a potentially high-risk activity, as it involves the use of industrial prestressing equipment that uses hydraulic rams to stretch high- ... The safe stressing of prestressed concrete products .

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    Prestressed Concrete Products. ... Anchorage and Barrier Products • SURE-LOCK® One-Time Use Products • SURE-LOCK® Multi-Use Products • GRABB-IT® Cable Barrier Products • GRABB-IT® Rail Products ... Hydraulic Tensioning Jacks • Mono-Strand Post Tensioning Jacks.

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    Appendix A Prestressing Systems and Anchorage Design General Introduction Prestressed concrete has attained worldwide recognition in the development of industrialised construction and design. Prestressing consists of introducing ... (56,000 lb), guaranteed ultimate tensile strength which is the limit of jack capacity. For higher strength ...

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    This page is a glossary of Prestressed concrete terms. A actual extension See measured extension. anchor anchorage A rigid component, commonly constructed of cast iron, located at the end of a tendon and that directly transfers a tendon's force to the surrounding concrete. ... The active hydraulic cylinder of a stressing jack, being the ...

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    Pre-Stressing and Post stressing of Concrete Products. Equipment: Single Pull Systems. Wire Type – Hydraulic Jack; ... A complete range of pre-stressing equipments comprising hydraulic pre-stressing jacks, anchorage assemblies, wedges, barrels, grout pumps, HDPE and metal sheathing, and all other accessories are made in India and supplied by ...

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    Post Tensioning Product. Prestressing System is based on Gifford Udall System and is used extensively by all major construction companies in India. The post-tensioning products, such as anchorage, sheathing, multipull & single pull hydraulic jacks & pumps; grout pumps & agitators are manufactured at the factory of Usha Martin at Ranchi.

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    Strengthening system using post-tension tendon with an internal anchorage of concrete members ... (pull the prestressing tendon with a hydraulic jack). Step 4: Grout mortar into the hole. Mimoto et al. [17] conducted a fundamental test for the internal

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    Practice Prestressed Concrete Structures questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams. ... The method of tensioning Manel-Balton system involves hydraulic jack tensioning two wires at a time, the arrangement of Magnel-Balton system constitutes of a rectangular cable section ...

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    Prestressed concrete 1. METHODS OF PRESTRESSING IN CONCRETE PRESTENSIONING & POST- TENSIONING ... Once the concrete has hardened, the tendons are tensioned by hydraulic jacks. When the tendons have stretched sufficiently, according to the design specifications they are wedged in position and maintain tension after the jacks are removed ...

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    What is prestressed concrete? How is it used? Before getting into prestressed concrete, let us go back to the basics first. ... Once the concrete is set then the steel wires are inserted through the tubes and then with help of hydraulic jack the steel wires are stretched and held in place with the help of special male female insert at the ends ...

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    is permanently free to move relatively to the concrete. The prestressing force is ... the prestressing steel during transfer of prestressing force. Some anchorage systems ... consisting of a hydraulic jack and gauge(s) calibrated as a unit, and a hydraulic pump.

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    Prestressed concrete: safety precautions in post-tensioning. 5. Tensioning ... Slip of a tendon element or local failure of one of the components in the pump—jack—anchorage-tendon system can cause a sudden release of this energy. ... note that safety glasses and working gloves should be used when working with hydraulic equipment (courtesy ...

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    SECTION 4 LOSS OF PRESTRESS EMPHASIS ON ITEMS SPECIFIC TO ... The stressing jack bears against the concrete Concrete is compressed gradually as the strand ... FRICTION AND ANCHORAGE ...

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    After tests indicate that concrete has reached sufficient strength, stress tendons by means of hydraulic jacks equipped with calibrated pressure gauges with an accuracy of 1 percent of scale range to permit the stress in tendons to be computed at any time.

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    Slip distribution model along the anchorage length of prestressing strands. ... The strand prestress transfer is produced at a controlled speed through the unloading of the hydraulic jack. (c.4) The concrete specimen is supported at the stressed end of the pretensioning frame while the prestressing force is transferred to the concrete ...

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    Multistrand Post-Tensioning System Available Anchorage Types Anchorage Type Tendon Type 59... (0.5" system) 59 ... 01 02 03 04 05 06 07 08 09 12 ...

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    PRESTRESSED CONCRETE TECHNOLOGY Stressing equipment - with the greatest precision and the simplest operation ... with large multi-strand stressing jacks or are individually tensioned with single-strand stressing jacks immedi- ... Hydraulic pulling/pushing machine for inserting the cut to length strands - using the drawing ...

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    GLOSSARY OF POST-TENSIONING TERMS By Larry B. Krauser April 6, 2007 ... and permanently transmit the prestressing force to the concrete. Anchorage Cover: ... for Uncoated High-Strength Steel Bar for Prestressing Concrete . Bars have a minimum …

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    Unidentified prestressing steel, anchorage assemblies, or couplers received at the site will be rejected. ... must not have an adverse chemical reaction with concrete, prestressing steel, or grout. Use seamless fabrication methods to produce plastic ducts. Provide a manufacturer’s certification ... Furnish hydraulic jacks with sufficient ...

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    Concrete Construction: Resources for contractors and specifiers including construction methods, materials and practices ... New German Prestressing System. ... During tensioning the tendon passes between a twin cylinder, hydraulic jack. The font of this jack surrounds the anchorage sandwich of wires and bears against an end abutment plate.

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