Protecting concrete usually means shielding it from the elements of nature or from harsh manmade chemicals. But it’s not just concrete that needs such protection. Corrugated metal pipe, steel surfaces, material hoppers, rail cars and masonry all can come in contact with corrosive or abrasive materials or harsh conditions.
The geotechnical needs of DOTs and other agencies responsible for roads and bridges are vast. Issues include: Culvert repair Soil stabilization Void filling Concrete slab lifting Sinkhole remediation Slope control Slough control in tunneling
Officials with a Georgia county installed new fiberglass liners inside of old and deteriorating manholes throughout the county. The new liners left a 3 to 5” gap between them and the manholes. Precision FillTM was chosen to fill this space due to its high expansion rate. It is also hydro-insensitive and, because of its slower set time, allows for a more consistent pour and prevents void pockets from forming.
The project included several manholes and each one used between 8 and 12 gallons of material. The process of lining and filling the annular space cost roughly 1/3 less than tear-out and replacement.
Recommended uses for Precision Fill include undersealing and stabilizing concrete slabs, compaction grouting of soils, stabilizing soils, and filling voids behind pipes, walls, manholes and other structures.