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Rehabilitation of wastewater pipe interior - Wartstrasse - Winterthur, Switzerland

Static retrofitting (wet-spray method) for structural enhancement

Rehabilitation of wastewater pipe interior - Wartstrasse - Winterthur, Switzerland

Topic 
Rehabilitation of wastewater pipe interior
Object 
Wartstrasse
City 
Winterthur
State 
Zürich
Country 
Switzerland
Date 
2013
Duration 
6 months

Situation

The city of Wintherthur has an extensive walkable wastewater pipe system, which is to be rehabilitated step-by-step over the coming years. The approx. 100-year-old pipe on Wart Street is egg-profiled (1000/1500 mm), made of in-situ concrete, and about 700 m long.

Solution

In stages, about 3 cm is grinded off the concrete pipe interior walls using high-pressure water jets. Next, the channel bottom is refurbished with a Kera-Line ceramic plate while the remaining surfaces are reprofiled by wet-spraying abrasion-resistant mortar S&P ARMO-crete w RQ onto the old concrete profile. Positioning the S&P ARMO Power Pump directly at the S&P silo prevents dust-related nuisances in the urban environment.

Material

600 tons of S&P ARMO-crete w RQ

Materials and methods were inspected closely through various tests on the structure and in the laboratory. All tests, such as for adhesive tensile strength, abrasion resistance, compressive strength, and water ingress depth yielded very good results, to the client’s high satisfaction. The quality specifications were far exceeded.

Image Gallery

  • Installation at the control unit incl. S&P Silo and S&P ARMO Power Pump

  • Pipe interior (concrete substrate) after a layer of concrete has been ground off

  • Completed reprofiling with S&P ARMO-crete w RQ

Service

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Related Products

S&P ARMO-System

Sprayable reinforcement mortars incorporating carbon and glass fibre meshes

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