(05) Системы преднапряжения / (3) Freyssinet - Домкраты и элементы (eng)
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Prestressing and Concrete
The Plougastelarch bridge stands (1933) besidesthe
new Elorn staycabled builtin 1994
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Types of Prestressing
Internal Prestressing
Incorporation of ducts into the reinforcement
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Types of Prestressing
Internal Prestressing
After removing the formwork prestressing anchorages are available in reservation for tensioning of tendons
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Types of Prestressing
External Prestressing
Roquemaure,emaure, 20002000
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System
•A prestressing system include
•Material
–Anchorage (trumplate, block, wedges,cap)
–Prestressing steel
–Duct
–Bursting reinforcement
–Injection material premix
•Equipment
–Threading, Stressing and grouting equipment
• Certified worker and site management |
1 bis, rue du Petit-Clamart – BP 135 |
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Freyssinet International & Cie |
– Training and certification process |
78 148 VELIZY – VILLACOUBLAYFRANCE |
APTITUDE CERTIFICAT Nb FI |
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Tel : 00 33 1 46 01 84 84 – www.freyssinet.com |
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Speciality (if any) : |
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Name : |
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Surname : |
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Birth date : |
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Issued on the : Validity : 3 years |
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ByFreyssinet: International & Cie testifies that the owner of this card is qualified |
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for the function of Post-Tensioning Specialist in accordance with AC CWA |
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14646. |
Multi strand system (civil works)
/Strand /Duct
/Trumplate
/Anchorage block
/Jaw
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Multi strands Prestressing 3 to 55 strands
Range of anchorages
The Widest world range
•3C15, 4C15, 7C15, 9C15, 12C15, 13C15, 19C15, 22C15, 25C15, 27C15, 31C15, 37C15, 55C15.
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The Compact block and trumplate
The distance between holes provide the most compact anchorage
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C range system= > 5 solutions
Field of implementation
Internal |
Grouted |
Bonded |
Internal |
Pre-grouted |
Un bonded |
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with greased |
replaceable |
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mono strand © |
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External |
Grouted |
Semi bonded |
External |
Pre-grouted |
Un bonded |
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with greased |
replaceable |
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mono strand © |
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External |
Waxed |
Un bonded |
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Ducts for the prestressing tendons
Plastic corrugated PLYDUCT ©®™
Steel corrugated duct (galvanised or not)
Steel LFC (Low friction Coef duct) ©
Liaseal for Precast construction™®
Steel Tube for Offshore PT or high curve Freyssinet connexion device
HDPE specific tube for ext PT
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