Searching for creative solutions for the unruly North Sea is part of our DutchDNA. The unique locations of hydraulic engineering structures that are constantly battered by the elements mean that robust solutions are required. And we have them!
We supply all standard types of armour stone with the usual density of 2,650 kg/m3. We also supply quarry stone with a very high density. Eclogite has a density of 3,200 kg/m3 and Rodense even has a density of 3,700 kg/m3.
What are the benefits of high density armour stone? A thinner layer is sufficient which saves on material. In the event of stone penetration with hydraulic engineering asphalt or colloidal concrete, it means you need less asphalt or concrete. A higher density is therefore interesting both from a financial perspective and the perspective of ENVI.( Dutch for Most Economically Advantageously Tender).
The sea defences along the Spui waterway were prone to the fluid subsidence failure mechanism. The water board decided that a large-scale, two layer reinforcement project was needed to guarantee…
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Project
Maintenance of the Amsterdam-Rhine canal
The Prinses Marijkesluizen is a complex of sluices in the Amsterdam-Rhine canal near Rijswijk (Gelderland) and Ravenswaaij. The complex consists of two lock chambers and a sluice to shut off…
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Deleting cookies in Chrome:
Click the 3 dots at the top right. Click History > History > Clear browsing data.
In the 'Clear browsing data' menu you will see at the top the option to clear browsing data from the first moment of usage up until the last hour. Underneath, you can choose the items you want to delete. In any event you should select 'Cookies and other site and plug-in data'.
Click the 'Clear data' button.
Deleting cookies in Safari:
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Click 'Delete all'.
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Select the cookies (preselected) > Click the 'Clear' button.
Deleting cookies in Internet Explorer:
Click the Tools cog at the top right > select Internet options > General tab. Under 'Browsing history', click 'Delete'.
If you do not want to delete everything, you should then select, in any event, 'Cookies and Website Data' and click 'Delete'.
More information about cookies
You can find more information about cookies on the website of the Dutch Consumers' Association: What are cookies? and deleting cookies.
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