During construction, the support columns in this clear-well were all placed incorrectly, as much as 25’ for one line. The top slab began to flex and the problem was further compounded with as much as 9" of standing water after a rainfall. Edge Structural Composite’s VelaCarb was selected as an alternative to replacing the top slab. The repair was carried out in less than a week and avoided any shut-down or disruption of service.
After a light sand-sweep & injection of cracks, the surface is carefully marked for FRP placement.
The pre-cut strips are saturated with epoxy in a clean dry area.
The pre-wetted Carbon sheets are carefully laid on the surface. A total of two layers, 24" wide are laid in a grid pattern around the top of the columns.
The sheets are smoothed out by hand to remove air bubbles and ensure full contact with the surface.
After inspection and successful adhesion tests, the finished repair was covered with a topping slab to prevent further loading by standing water.
