Major landscaping projects require vast amounts of mineral materials. Secondary aggregates contribute to a project near Amsterdam, Netherlands

Innovative landscaping for the benefit of residents

Next to the North Sea Channel in Amsterdam, the Netherlands, one of the biggest landscaping projects was built incorporating the use secondary construction materials. It is called “Het Groene Schip” – translated as “The Green Ship”. The project aims to provide a visual barrier between the Amsterdam harbour and surrounding areas.

europe map nl groene schip grau

The location of the Groene Schip

A unique landmark

The firms responsible for the project are “NV Afvalzorg Holding” and “Koninklijke Boskalis Westminster N.V.” The project owner is the Dutch state.

The project is unique. In Haarlemmerliede and Spaarnwoude, this green landscape will represent a new landmark, not only providing visual relief but also an innovative regional recreation area. Current ideas for its use include walking and cycling paths, a sports centre including outside rooftop swimming pool and a restaurant with views over the North Sea Channel.

Engineered for secondary aggregates

The “Green Ship” spans an impressive 1 kilometre in length and around 30 metres in height (the peak point is around 60 metres in height) and resembles a ship anchoring in the channel. For the construction, a total of at least 3 million m³ of mineral material were used.

granova europe NL Damm

The Green Ship provides a barrier between the harbour and the residential areas

The main part of the construction was built using incinerator bottom ash aggregate, the processed remains of energy-from-waste plants. In the Netherlands, IBAA for this kind of construction must be certified according to the Dutch BRL 2307.

As in other European countries, secondary materials in the Netherlands must be securely distanced from groundwater. As the Dutch ground water level is very high, an according layer of primary material was built as a base for the remaining construction in order to ensure the required distance between the foot of the construction and the water level.

HEROS as main supplier of IBAA

Daily, up to 10,000 tonnes were needed for construction purposes. The first part of the project was finished in around 3 years. Among the main IBAA suppliers for “The Green Ship” was  the Dutch HEROS Sluiskil B.V., a 100% subsidiary of REMEX Mineralstoff GmbH. HEROS is also a partner to granova®, as HEROS markets its high end IBAA for use as concrete aggregate under the granova® brand.