Repair of dams and hydroelectric power plant constructions with UHPC concrete

Hydroelectric power plant

UHPC Concrete has been used as a construction or

repair material in offshore, port construction and

coastal protection worldwide for more than 25

years. UHPC concretes are far superior to standard

concretes in their application and service life

expectations.

Typical areas for UHPC concrete repairs

 - Core walls
 - Deflection tunnel
 - Spillways
 - Stilling basins
 - Slope protection

Advantages of UHPC compared to standard concrete

 - Extremely high compressive strength
 - Very good adhesion
 - Waterproof from a layer thickness of 15 mm
 - Very high wear resistance
 - Very high corrosion resistance
 - Very high resistance to frost and ice
 - Very good impact resistance
 - Quick and easy installation, even of large areas
 - Thanks to the extremely fine UHPC binder, even the

   smallest joints and cracks can be closed well and permanently
 - UHPC can be processed as shotcrete, castable or as mortar.
 - UHPC reaches more than 70% of its maximum nominal

   strength after 48 hours.

Dams
Especially the slides of a dam are subjected to high amount

of wear as a very high volume of water is running over

these. UHPC can easily withstand this water. UHPC is the

ideal material for dam reinforcement and repair/maintenance.

UHPC materials can be quickly and extensively processed

as mortar, cast or shotcrete.

The rapid and high strength development favors a quick

restart of the system.
In the lake in front of the dam, the dam will be subjected

to impact by debris, which can deteriorate concrete. Placing

a layer of UHPC will end the deterioration.

UHPC in alternative and regenerative energy production

UHPC materials are used in all processes of alternative and active native energy production used as the material for foundations, as a lining-material for protection against corrosion, wear and as a construction material. Due to the diverse application possibilities and the superior properties compared to standard concrete qualities, UHPC are increasingly used in the mentioned areas. UHPC has the advantage that it can be processed just like standard concretes.

Hydroelectric power plants or storage power plants
Due to the extreme corrosion resistance of UHPC concrete constructions with a much higher reinforcement density per volume can be used. This can significantly increase the strength of the construction or the wall thicknesses or layer thicknesses can be reduced while maintaining strength.
In the right combination UHPC is very resistant to wear and cavitation.
Since UHPC already reaches 70% of its maximum nominal strength in the standard quality after 48 hours and in the special quality after only 12 hours.
UHPC is available as mortar, casting material and shotcrete material.

Tidal power plants
Some tidal power plant systems are already being used in Europe and Asia. There are now a lot of technical variations of tidal power plants for the coasts but also for directly in the sea. One thing all needs a stable seawater resistant and durable foundation.
Based on the experience gained with the foundation systems of the offshore wind power plants, high quality UHPC materials are ideally suited for this purpose. In particular, the enormous adhesive power of UHPC in anchoring and bolt system is required here. What is once shed in a UHPC foundation can no longer be removed from the foundation, even with enormous forces. Not only in this regard, UHPC is many times superior to normal standard concrete.

Biogas power plant

Biogas has been produced in many small plants in the past. There are already very large production facilities in Europe. The plants have corrosion and wear problems due to the production process. Especially wherever standard concrete was used. Here, a UHPC protective layer of a few millimeters can be used to achieve permanent corrosion protection. To achieve a very long service life, UHPC concrete should be used for the new construction.