Acceptance limits for the content of pollutants in recycled materials in road construction

The paper presents the acceptance limits for content of pollutants in recycling materials newly formulated by the Norwegian Roads Recycling R and D program, a 4-year research program of the Norwegian Public Roads Administration (NPRA). The paper explains how the limits have been calculated and how they are to be implemented as a quality requirement in the NPRA's design codes. The method used was a coupling of the European standard for characterization of waste, ENV 12920 (published as EN 12920 in April 2006), and the Norwegian national guidelines for risk assessment of contaminated soils, SFT 99:01. The coupled method was applied on a standard road scenario using recycled materials in their most usual fields of application, in an environment surrounded by sensitive recipients. Based on the acceptance criteria concerning drinking water, surface water and toxicity to humans, the limiting values of the content of pollutants were calculated and evaluated (A). For the covering abstract of the conference see ITRD E212343.