End-of-Waste Criteria for Construction & Demolition Waste

image of End-of-Waste Criteria for Construction & Demolition Waste

This report presents the situation within the Nordic countries with respect to production and recycling of construction and demolition waste, in particular crushed concrete, in the form of aggregates, and discusses the conditions and requirements relating to environmental impacts for a possible application of the End-of-Waste option in the Waste Framework Directive. If this option is applied, the material may become a product and it will no longer be regulated by waste legislation. Regulation of crushed concrete under product legislation presents a number of challenges, particularly with respect to environmental protection. The report presents and proposes a methodology for the setting of leaching and risk-based criteria to be fulfilled by crushed concrete (and other waste aggregates) in order to obtain End-of-Waste status. It is further recommended to set impact-reducing conditions on the use of materials obtaining End-of-Waste criteria, and not to allow free use. It should be noted that the work described in this report was carried out during the period from 2010 to 2012.



Description of leaching tests

Leaching tests are basically carried out for the purpose of providing answers to questions, such as “What is the initial concentration of the eluate/ leachate from an aggregate being percolated by infiltrating rainwater?” or “What is the total leachable amount of various substances from an aggregate?” or “How does the leachability of various substances vary with pH?” or “Does this aggregate comply with the regulatory limit values for this or that purpose?”– and many others. Several questions are relevant for an assessment of the compliance of an aggregate with possible leaching requirements for the achievement of EoW status. Clearly, one single test cannot provide all the necessary answers, but a few, carefully selected leaching tests will be sufficient. The tests should be selected on the basis of the nature of the questions to be answered and the leaching mechanisms involved.


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