hollow-core slabs - Recreate

February 17, 2025
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The Refurbishing Plan developed by Lagemaat outlines a comprehensive renovation strategy for the Prinsenhof A-building that is being used as a donor building to transform it into the Circular Centre Netherlands (CCN) as the Dutch pilot project.

The plan addresses spatial integration, new site layout, and construction processes in Heerde. Temporary facilities, such as a mock-up and the Inspiration Pavilion, will be built to provide a realistic representation of the final design, to test the construction process and design details, and to allow visitors and stakeholders to explore the site. Additionally, a processing and sawing shed will be established to optimise space and facilitate refurbishment operations. The CCN design incorporates hollow-core slabs and façade elements. The façade elements are categorised into corner and middle elements based on structural application. The refurbishment involves uncovering external finishes and insulation to maintain structural integrity. A repurposed in-site tool will facilitate the processing and sawing of elements. Façade elements were cut, and the front parapets were removed from the structural elements with the saw wire. The parapets are then stored separately and stacked for clear and efficient organisation. Hollow-core slabs will be shortened using specialised equipment. This includes, among other things, cutting the elements using a specially designed setup tailored for shortening the slabs simultaneously.  This phase ensures the elements are prepared for reuse without damage and in the same place where the CCN will be assembled.

Materials are managed with appropriate storage space to ensure easy identification and accessibility. This arrangement allows efficient use of logistics and space at the main site. The strategic approach aims to reduce risks, minimise costs, and enhance the overall quality of the project. This plan aims to ensure good practices for sustainable construction and future projects, aligning with the objectives of the ReCreate project.


June 28, 2024
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Marcel Vullings – TNO

CROW is a Dutch organisation that gather and uncloses knowledge which is relevant for civil works and buildings. CROW officially launched the CROW-CUR Guideline 4:2023 “Reuse of structural precast concrete elements” on Tuesday (11-06-2024). This guideline provides a practical description of a working method that can be used in projects involving the reuse of structural precast concrete elements. It covers various aspects, such as preparations for deconstruction, the disconnection of elements, the temporary storage of elements, the assessment of rewon elements and the reuse of these elements in new structures. The guideline has a general section that covers topics that apply to reuse of all types of precast concrete elements. In addition, it has annexes in which specific products are highlighted . Currently, there are two annexes: annex A deals with reuse of hollow-core slabs and annex B covers precast prestressed bridge girders. More types of elements are going to be added to the guideline in the near future. The guideline is for both infrastructure and buildings, in the broadest sense of the word. Many aspects are the same for both, and the non-standard aspects are dealt with in the separate annexes.

TU/e, TNO and other experts, including contractors, engineering firms, clients and testing companies, contributed their knowledge, experiences and insights to shape the guideline. In this respect, the knowledge and experiences from the pilot projects of the Horizon 2020 project ReCreate were very valuable. The wide-ranging scope of ReCreate has helped shape all the guideline’s sub-sections.

CROW launched the Guideline on site at IJmuiden. Heidelberg Materials hosted the event and after presenting a quick overview of the guideline for a mixed audience, we all got a chance to check out the temporary storage (near Heidelberg Materials) for the harvested precast concrete bridge girders. Here, the girders are waiting to be used in new bridges at various locations in the Netherlands.

Hergebruik constructieve prefab betonelementen – CROW





EU FUNDING

“This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 958200”.

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