Helping the Milan subway system stay dry

Milan, Italy, has dealt with a rising water table for decades. That made it difficult to build a new 1 kilometer tunnel for Milan's Metropolitan subway line. Waterproofing was essential, as the site runs closely to a canal. 

The contractors chose our Preprufe® waterproofing solution. Waterproofing was used on the horizontal foundation slab, vertical diaphragms and the roof.

Preprufe® ensures perfect impermeability. Even in the case of accidental damage, it prevents lateral migration of water between the membrane and the structure itself. That means the tunnel stays dry, and the trains can stay running.

Civil tunneling projects achieve greater efficiency and productivity 

Contractors have relied on our TYTRO® products in huge tunnel projects across Australia, North America, Western Europe and Latin America. 

For instance, TYTRO® has been part of many of Brazil's most recent drill and blast highway and subway tunnel projects. Largely due its significant productivity and cost advantages, TYTRO® has quickly become the top solution in civil tunneling projects in Latin America.

We have extensive experience in underground construction, including soft ground tunnel projects such as Crossrail (London) and the WestMetro (Helsinki). Wherever projects take you, our world-class field technical specialists are available to work with your team on site. Count on us to ensure you get an efficient mix that suits your project needs.

Helping make Crossrail real

Crossrail is one of the largest underground projects in Europe. It has 42 kilometers of new tunnels up to 30 meters under the streets of London.

The contractors liked our experience in underground construction. That's one reason why they tapped us to help with waterproofing and other solutions at several of the new stations, including:

  • Canary Wharf: To hold back up to 10m of surrounding Thames dock water, builders used our Preprufe®, Adcor® and Bituthene® waterproofing solutions.

  • Liverpool Street: About 4,000 m² of Preprufe® waterproofing provides superb protection to an underground area almost a quarter mile long.

  • Tottenham Court Road: At a cost of £1 billion, it's the length of four football pitches and three stories underground. Builders relied on Preprufe® and Bituthene® waterproofing solutions as well as Adcor® hydro-expansive and injectable waterstops.

Digging deep in Seattle

The Beacon Hill tunnel is a twin tunnel located east of I-5 in Seattle.

One tunnel carries northbound trains. The other carries southbound trains. Overall, the tunnel is approximately one mile long and includes a 165-foot deep station accessed by an elevator at street level.

The ADVA® Cast precast segments were cast in eight sets of highly accurate, machined steel molds. Each set forms the shapes for the seven segments that make up one ring. The molds were cycled once per day and cured in enclosed tents overnight with steam heat. 

More Profiles


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De Neef® injection materials provide leak sealing and water control in underground construction and soil stabilization. We can stop any type of leak in any type of structure with our concrete injection solutions.

Our innovative masonry admixtures prevent moisture penetration to help producers of architectural masonry and hardscape mix strong, durable, aesthetic concrete.

Ready mix concrete suppliers rely on our admixtures and fibers, cement additives, technologies and field services to ensure they produce strong, durable and workable concrete.

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