Extrusion anchorage
The extrusion anchorage consists of an anchor ring and anchor spring, designed for situations where large stress members or limited space constraints are present. It is created by extruding a casing under pressure, securing it to the strand bond anchorage. Once embedded in concrete and arranged as required, it is tensioned after the concrete reaches the designated strength.
| Extrusion anchorage | |
| Hardness | 60-108HRB(5-25HRC) |
| Material of extrusion sleeve | 40Cr GB/T3077-1999 or 45#GB/T699-1999 |
| Material of extrusion spring | 65MN |
| Static load test | Anchorage efficiency coefficient ηa and ultimate total strain ε,Conform to the GB/T14370-2007 standard article 5.5.1. |
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