A few impressions from a project with pre-stressed carbon laminates in the canton of Schwyz, Switzerland: 126 S&P C-Laminates with a total length of 870 metres had to be prepared, pre-stressed, bonded and secured with end anchors. For pre-stressing and end anchoring, 2520 steel anchors were required.
During pre-stressing, a hydraulic cylinder put the laminates under a tension of 14 tonnes. Special clamps ensured that the tension remained constant, so that the cylinder could be removed, the end anchors installed and the adhesive allowed to cure. Further information on structural reinforcement with fibre composites is available here.