PU Injection Resins
WEBAC® 1403
- Classic Line
Joint renovation, pumped fed power station Hohenwarte II
The Hohenwarte II pump-fed power sation is picturesquely located south of the Saale Valley in the Thuringian countryside, surrounded by Amalienhöhe, Frankenhügel, and Lerchenhügel. Built between 1956 and 1963, this energy-efficient hydroelectric power sation uses low-cost electricity available at night to pump water into a high-altitude reservoir. During daily peak loads, the stored water is diverted through turbines, generating additional electrical energy.
Over time, significant water ingress occurred at the Hohenwarte II pump-fed power sation. In several areas of the structure, both the horizontal construction joints and the vertical block joints—the latter running continuously from the foundation base to the top of the wall—were completely saturated. Increasing amounts of seepage water entered the control, level, and drainage shafts, which severely impaired operational safety and made comprehensive renovation unavoidable.
WEBAC 240 polyacrylate gel was used to permanently seal the joints. Thanks to its very low viscosity and high resilience to dynamic movements, this gel is particularly suitable for adapting to the structural movements of the intake structure, which are mainly caused by pump and turbine operation. Its high elasticity and reliable adhesion contribute significantly to the long-term stability of the structure.
PU injection resin WEBAC 1403 was used for the horizontal construction joints, which had smaller joint opening widths. This resin forms a closed, watertight pore structure on contact with water and offers an effective and permanent sealing solution thanks to its increased elasticity.
The measures taken will ensure that the Hohenwarte II pump-fed power sation remains functional and structurally sound for many decades to come.
Products Used
- View details
WEBAC 1403 is a long-track-record proven PU injection resin, particularly valued for its safe and controlled application. Upon contact with water, it cures into a closed, waterproof, and dimensionally stable resin with a fine pore structure. It is suitable for sealing, crack injection, and stabilizing masonry and concrete, and is used for post-construction damp proof courses (dpc) against capillary rising damp.
Acrylat Gels
WEBAC® 240
- Classic Line
- Consolidation Line
View detailsWEBAC 240 is a low-viscosity, fast-setting polyacrylate injection gel with National Technical Approval from DIBt (B-concentration 2%). After curing, it forms a waterproof, firm-elastic gel that reliably absorbs dynamic and mechanical stresses. It is particularly suitable for curtain injection—either in the subsoil immediately adjacent to the structural element or within the existing building structure—as well as for subsoil stabilization and waterproofing or damp proof courses (dpc).
