Filling cavities to restore structural continuity.
URETEK CAVITY FILLING®
URETEK is recognised worldwide as a specialist in high-quality technical solutions for the repair of subsided concrete floors and foundations.
The URETEK Cavity Filling® method is a high-quality filling solution. It is reliable, durable, technically quick and easy to use, and enables cavities to be filled and their structural continuity to be restored. It has a long service life.
How it works
The URETEK Cavity Filling® method aims to fill cavities and restore their structural continuity, providing a long-term, sustainable solution. The method comprises the following sequential steps:
Filling (backfilling) by introducing, blowing in or allowing to settle by gravity an inert filling material in the form of expanded clay pellets (*).
A filling process involving the introduction of an expanding polyurethane resin. The URETEK resin has been specially developed to completely fill the upper part of the void through expansion, by placing the filling material under tension and compressing the whole, thereby creating a permanent state of tension on the walls bounding the void.
Technical data:
- Cavity Filling® is a lightweight filling;
- The filling is stable and durable;
- The clay pellets and polyurethane resin comply with current environmental standards;
- Thermal conductivity λ in the order of 0.07 W/mK;
- Most of the cavity is filled with clay granules.
Filling
A filling process (backfilling) involving the introduction, injection or gravity-fed placement of an inert filling material such as expanded clay pellets. If the cavity is inaccessible, filling is carried out by gravity via boreholes drilled from the surface. If the cavity is accessible, filling is carried out by targeted injection from inside the cavity. The voids are filled to their maximum volume, typically 95 to 98 per cent of their volume.
Filling
Filling of the void by applying the expanding polyurethane resin URETEK Resin. The resin is injected in liquid form through injection pipes. If the void is inaccessible, the pipes are laid in boreholes between the surface and the void. If the void is accessible, the pipes are pre-positioned before filling work begins. The resin expands and cures through a chemical polymerisation reaction; as a result of its expansion, the void is filled and the previously inserted material is compacted.
Injection
Complete injection of the volume. If necessary or expressly requested, the expanding resin is injected evenly into the entire cavity within the ‘spherical masses’. The filling completely fills the volume. This ensures the cohesion of the ‘spheres/resin’ mass and facilitates further work in the subsoil. As before, the expanding resin ensures a perfect seal of the cavity’s ceiling and optimal saturation of its walls, thereby eliminating the risk of subsidence and facilitating further work in the subsoil.
Benefits of URETEK CAVITY FILLING®
- Suitable for hard-to-reach areas
- Efficient and permanent filling
- Minimal impact on the ground
- Minimal environmental impact
- Suitable for use as a terrace