The 2025/3 issue of Cement focuses on transformation. It features several reflective articles on the challenges of repurposing existing buildings. In addition, it presents a range of compelling project examples, such as Het Groot Handelshuis in Groningen, Fenix in Rotterdam, and the Meelfabriek in Leiden. Strengthening techniques are also discussed.

Reusing concrete frames: usefulness and necessity
Don’t demolish without asking questions

Author: 
Rob Doomen MSc, Pieters Bouwtechniek

Concrete is a remarkable material with a long lifespan. Many existing concrete structures could last for centuries. Yet many buildings are being demolished. Why is this happening? And why are we missing so many sustainable opportunities? Nine questions on the usefulness and necessity of reusing existing structural frames.

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Appreciating concrete giants
The right approach to reuse gives existing buildings a deserved future

Authors:
Eveline Gootzen MSc and Lars Hogenboom MSc, ABT bv

The Netherlands is home to millions of post-war buildings where concrete plays a major role. Whether or not you find them beautiful, these buildings hold great value – economically, architecturally, functionally, historically, and environmentally. In light of the current climate crisis and associated goals, reusing buildings and/or building components should be a matter of course – or at the very least, always be carefully considered.

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Transforming an icon of post-war reconstruction
Former V&D department store in Groningen redeveloped into Het Groot Handelshuis

Author:
Theo van Wageningen MSc, Dijkhuis ingenieurs

Het Groot Handelshuis is a multifunctional building located at the Grote Markt in Groningen, housed in the former V&D department store. Much of the original structure has been preserved, though various structural interventions were required – including the addition of an atrium and a new rooftop structure.

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From warehouse to Fenix
Fenix warehouse transformed into art museum on migration

Authors:
Paul Korthagen MSc RO and Dirk-Jan Kortman BEng RC, IMd Consulting Engineers

The Fenix warehouse in Rotterdam, a striking industrial monument, is being given a new purpose. Once a hub of commercial activity, it is being transformed into a modern space that honors its history: Fenix, a museum focused on migration. The concrete structure had suffered significant damage over time, partly due to differential settlement. Thanks to clever structural interventions and extensive repairs, it now meets the strict standards of a museum.

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Balancing new construction and reuse
New façade and atrium for the existing Strawinskyhuis

Authors:
Willem Klaverveld BEng RO and Michiel IJskes MSc, ABT bv

In the heart of Amsterdam’s Zuidas district, right next to Amsterdam Zuid train station, stands the distinctive Strawinskyhuis. Originally built in 1972, it had to be transformed into a sustainable office building with a modern appearance, both inside and out. The design sought a balance between new construction and the reuse of the existing load-bearing structure.

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Structural puzzle piece
Meelfabriek (Part 1): Renovating existing monuments as part of the transformation of an industrial complex

Author:
Rob Doomen MSc, Pieters Bouwtechniek Delft

The Meelfabriek in Leiden is undergoing a large-scale transformation in which an industrial complex is being redeveloped into a multifunctional residential area. The historic buildings are being renovated, and new ones are being added. This first article of a three-part series discusses the structural assessment of the existing buildings and their transformation to accommodate new functions.

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From national monument to sustainable office
Existing structure restored, new atrium, lift shaft and cycle stair added

Author:
Koos Tolsma MSc, Haskoning

In May 2025, Haskoning will move into the former Faculty of Mining Engineering in Delft. During renovation, the existing structure was preserved as much as possible, though it required strengthening in several areas due to degradation. New additions include a large atrium. One of the greatest challenges was transforming the building into a Paris Proof office and integrating the necessary technical systems.

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Strengthening rather than demolishing
Overview of methods to reinforce concrete structures

When a structure no longer meets requirements, demolition is often the first thought. However, in many cases, reuse is still possible by applying strengthening techniques. What are the main methods and considerations?

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Articles Outside the Theme

But who turns on the tap?
Column by Rico Zweers

Rico Zweers responds to a column by Maurice Hermens, emphasizing the importance of the entire construction chain in ensuring safety. And the need for dialogue. “If we truly want a cultural shift, we mustn’t scapegoat the structural engineer. The chain must take collective responsibility.”

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3D Concrete Printing: Beyond the Promise
Column by Diederik Veenendaal – Structural Engineer of the Year

Diederik Veenendaal explores the potential of 3D concrete printing. According to him, the value lies not in the technology itself, but in the vision behind it. “If we want to contribute to sustainability, circularity, and material efficiency in a meaningful way, we must deploy this technique where it has the most impact. Starting with a fair and modest view of its strengths and limitations.”

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