Case Studies: Department Of Transportation Concrete Repair
On public roads, there are solid approach slabs that are normally twenty feet long and serve as the connecting piece between the road on land and the bridge itself. In the case of Constitution Boulevard, as is often the case, the soil began to sink near the edge of the level ground where the bridge begins, causing the approach slab to lose its contour with the bridge. In fact, the east side northbound road had dropped 3 inches when AquaGuard came to inspect the problem, and the south lane had dropped 5 inches. Such a differential in road height between the approach slab and bridge created a dangerous driving environment and had the potential to cause damage to vehicles quickly approaching the bridge.
Using AquaGuard’s patented PolyLevel technology, one of our Commercial teams came out to inject the expansive foam-like PolyLevel substance below the approach slab. PolyLevel consists of an expanding two-part polymer foam that is injected at high pressure in liquid form, filling any gaps or voids underneath the concrete and then engaging with itself and expanding within approximately seven seconds. The difference with PolyLevel is that the foam is flexible during installation and thus can fold back over itself for a gentle, accurate lift. PolyLEVEL is completely inert and waterproof, so there is no chance it will wash out over time, and it weighs an astonishing 4 lbs per cubic foot, so it does not add discernible weight to the underlying soil below, like additional concrete or concrete slurry would.
AquaGuard’s PolyLevel system raised both the approach slabs and their adjacent sidewalks back into contour with the bridge. Best of all, we were able to complete the entire project in only two days while coordinating our own traffic control, and Constitution Boulevard now has a long-term solution to the common problem of soil settlement.
PolyLEVEL – https://www.aquaguard.net/concrete-leveling/
by aquaguard | Nov 27, 2017 |