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Corrosion Protection Classification
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In the Recommendations for Prestressed Rock and Soil Anchors (Third Edition, 1996 endorsed by ADSC), the Post-Tensioning Institute, Phoenix, defines two classes of Corrosion Protection: |
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Class I, Encapsulated Tendons (often referred to as double corrosion protection, DCP)
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Class II, Grout Protected Tendons (often referred to as single Corrosion protection, SCP)
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These classes are further are further outlined:
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| Class |
Protection Requirements |
| Anchorage |
Unbonded
Length |
Tendon Bond
Length |
I
Encapsulated
Tendon |
- Trumpet
- Cover if Exposed
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- Grease-filled
Sheath , or
- Grout filled Sheath, or
- Epoxy for fully bonded Anchors
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- Grout filled Encapsulation, or
- Epoxy
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II
Grout Protected
Tendon |
- Trumpet
- Cover if Exposed
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- Grease-filled
Sheath, or
- Heat Shrink Sleeve
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Grout |
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Deciding on Corrosion Protection Class |
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| The class of corrosion protection system for a project can be selected using the principles outlined in the Figure: |
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