Civil and hydraulic engineering
Civil and hydraulic engineering (GWW in Dutch) is one of the major consumers of materials in the Netherlands. Every year, more than 20 million tonnes of material is used to extend and improve our roads, canals, engineering structures (bridges, locks, etc.) and subsurface infrastructure (source: SKAO, Roadmap for a climate-neutral infrastructure sector, see background information). In many cases these objects are technically not very complex and designed for long term usage.
- Choose circular design principles that fit with your project. Explain your choices to the market players in advance, thus enabling them to come up with the right solutions. Not all design principles can be applied to every type of project.
- Determine in advance whether or not you want to have an adjustable Work, or one that can be disassembled. This is desirable for some projects, but not for others, depending on your needs.
- Manage on lowering the environmental cost of the applied materials. Asking for an environmental cost indicator (MKI) could be helpful in this respect.
- Find ways to procure management and maintenance together with the realisation of the project, especially for smaller projects: this gives market players an incentive to increase quality.
In 2019, the first circular viaduct ever built was presented. Regular viaducts usually have to be demolished after 30 to 50 years, but this viaduct may well last 200 years. Every construction component that was used can be reused without loss of value. Interesting detail: this project was not initiated by the contracting party, but by the contractor instead.
When a large amount of construction and demolition waste became available, the municipality of Apeldoorn saw an opportunity to use this material to improve the cycling infrastructure. Local partners were found in road building company Schagen Infra and concrete manufacturer Bruil, together they designed a sustainable and circular cycle path that uses 75% recycled concrete granules.
In the action plan for Sustainable Procurement the municipality of Utrecht names the public space as a promising product group that warrants extra focus on the procurement objectives. For the Dichterswijk Bus Lane project this is reflected in a DuboCalc calculation and the award criterion ‘circular opportunities’.
This guide describes how life cycle costs can be used as an award criterion.
This publication describes the circular design principles applied by Rijkswaterstaat. These principles have been developed for the MIRT process but can also be applied to other processes.
The CB’23 platform is working on widely supported market agreements regarding the standardisation of circular construction principles. The results have been summarised in three sets of guidelines that can be downloaded from platformcb23.nl (Dutch).
DuboCalc enables you to make transparent the environmental impact of a project, based on data in the National Environment Database.
This report shows the impact of civil and hydraulic engineering, in terms of both energy and material usage, and describes for specific materials (concrete, asphalt, steel) what it takes to become a climate-neutral sector.
Publication - Leverage guidelines for circular procurement for construction and civil and hydraulic engineering projects (Dutch)
These guidelines cover various possible solutions for the transition towards circular construction and civil and hydraulic engineering.