Bright tunnel view
Bright tunnel view
Schemelsberg tunnel refurbished: Good visibility, long maintenance intervals
Bright, glare-free walls ensure safe traffic in the Schemelsberg tunnel near Heilbronn. To achieve this, the 676 metre-long tube was given a highly resistant coating - which is also easy to clean and extends maintenance intervals.
The Schemelsberg Tunnel is part of the Weinsberg bypass near Heilbronn. Around 20,000 vehicles - mainly commuters - use this section of the B39 every day. The 676-metre-long tunnel was modernised in 2025 and equipped with the latest safety technology and rescue tunnels.
Protection for the inner walls
The side walls of the tunnel inner shells - a total area of 4,500 square metres - were given a new protective coating up to a height of four metres: StoConcrete Protect Prime TU 100 is a tested and approved surface protection system OS-C (OS 4), i.e. an epoxy resin coating with increased impermeability for surfaces that are not suitable for vehicle traffic. It equalises the surface and closes pores and cavities. This makes the building fabric easy to clean and maintain and provides lasting protection. This in turn is particularly economical, reduces lockout times and increases safety in the tunnel.
In addition, the new coating protects the tunnel from damage caused by exhaust fumes and water-soluble pollutants. The surface is now also highly mechanically resistant and resistant to strong chemical attack, alkalis, hydrocarbons and petrol. The excellent cleanability and low susceptibility to soiling are also certified with the top grade in accordance with EN 11998.
Only water gets on the wall
The tunnel walls can be cleaned with little water and no chemical cleaning agents. Thanks to the light-coloured, non-reflective surface, visibility in the tunnel is good, which ensures safety. The StoPox TU 100 coating also prevents unwanted "embellishments": It fulfils the requirements for an anti-graffiti system (AGS 1) in accordance with the TL/TP-ING of the Federal Highway Research Institute.
The entrance and exit of the Schemelsberg tunnel were also sealed with StoPur WV 60. The material is highly UV-resistant and thus prevents yellowing caused by sunlight.
Construction panel
Repair of the Schemelsberg tunnel near Weinsberg
Client: Stuttgart Regional Council, Heilbronn
Planning: ZPP Ingenieure, Bochum
Construction company: Leonhard Weiss GmbH & Co. KG, Göppingen
Construction materials:
Repair:
Protection against corrosion: StoCrete TK
Bonding agent: StoCrete TH 200
Repair mortar: StoCrete TG 202
Tunnel coating:
StoConcrete Protect Prime TU 100
Fine levelling: StoCrete TF 204
Coating: StoPox TU 100
Sealing coat: StoPur WV 60
Image material
The StoConcrete Protect Prime TU 100 tunnel coating system reduces cleaning work and costs in the long term. At the same time, it reduces traffic-impacting lockout times because cleaning intervals can be planned longer.
Image: Stuttgart Regional Council
The sun shines directly on the entrance and exit of the tunnel. To prevent yellowing of the coating in this zone, it is additionally protected with the highly UV-resistant StoPur WV 60 sealing coat.
Image: Stuttgart Regional Council
The sun shines directly on the entrance and exit of the tunnel. To prevent yellowing of the coating in this zone, it is additionally protected with the highly UV-resistant sealing coat StoPur WV 60.
Image: Stuttgart Regional Council
StoConcrete Protect Prime TU 100.
(Optionally available in addition: StoPur WV 60 sealing coat).
Picture: StoCretec GmbH
1 - Fine levelling StoCrete TF 204
2 - Coating StoPox TU 100
Press release and images
Please contact
Reprint free of charge, please send a voucher copy and any queries to:
pr neu - gedacht
Jan Birkenfeld
Wendebrück 2d
D-38110 Braunschweig
Phone: 05307 80093 85
E-mail: j.birkenfeld@pr-neu.de