Iconic waterproofing

The innovative Dutch company Bitufa Waterproofing's product Flexobit contains only SBS and bitumen and has been sold to customers in over 20 countries. For example, it was used to waterproof the iconic Hotel Atlantis project in Dubai.

Near the economic hotspot of Zwolle in the east of the Netherlands, the innovative company Bitufa Waterproofing BV has its production facility in Wapenveld, with an associated laboratory and research department. Production focuses on bitumen membranes used for waterproofing of buildings, cellars and roofs, for example. Bitufa's most well-known product, Flexobit, contains only SBS and bitumen and has been sold to companies in the construction industry in over 20 countries. For example, Flexobit was used to waterproof the iconic Hotel Atlantis project in Dubai.

SBS, i.e., styrene-butadiene-styrene, is a thermoplastic elastomer that has excellent durability and ageing stability when mixed with bitumen. Because Flexobit is a bituminous membrane with no filler or carrier — which most other manufacturers mix in — the detail work around corners and pile heads, for example, is safe and easy, with durable adhesion even on rough surfaces.

In order for the specialized waterproof membrane to function optimally, and withstand a lifespan of up to 20 years, it is essential that the bitumen maintain a consistently high quality. Nynas has been delivering bitumen to Bitufa for over 40 years — currently Nytop 210. Combined with polymers, it ensures good elasticity at both low and high temperatures, increased joint strength and improved cooling properties.

Bitufa recently started a new production line of roofing materials using waste as raw material: a major, sustainable leap into the circular economy.

Projects

Gothenburg, Sweden

The Älvsborg Bridge spans the estuary of the Göta Älv river at the entrance to Gothenburg and the biggest port in Scandinavia. The bridge, officially opened in 1966, has a total length of 930 m and a suspended span of 418 m. To guarantee the bridge's functionality and extend its useful life, extensive maintenance work has been under way since 2019, the third and final stage being completed this summer.

Talking point

Road infrastructure in North-Western Europe

Even though many successful road projects have been completed in Western Europe in recent years, the durability and availability of the road infrastructure needs to be improved.

Interview

Paving the way for asphalt 4.0

Digitalisation is making inroads in the asphalt industry. The latest Eurasphalt & Eurobitume (E&E) Congress was held virtually in June. It was a success, but the next E&E event will allow industry stakeholders to meet face-to-face.

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Sustainable Development

The way forward for Wales

Over ten years in the making, the Welsh Government’s new surface course specification centres around stone mastic asphalt (SMA) and hopes to significantly increase the service life of the road surface materials.

Noted

All the key players are working together to achieve the best possible result.

Katri Eskola, Specialist Road Maintenance Finnish Transport Infrastructure Agency

Talking point: The COVID-19 pandemic


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