Article: the historic concrete of Fortress Naarden

Read about the use of concrete in the Naarden Fortifications! This article is part of the publication 'Construction Matters' of 8ICCH, an international conference on historical material use.

In 2022, Jeroen van der Werf and Federica Marulo, our former trainee, started a study on the building material of 12 concrete shelters in the fortress. A striking result is that each shelter had a different concrete recipe. They share their results in this article and presented the findings during the conference in Zurich early 2024.