LCA was used to assess the environmental impacts from recycling of C&DW in road construction. The scenario comprised all stages in the end of life of C&D concrete, including recovery of materials, as well as avoided production of the substituted goods. Results show the importance of transportation of the material, especially when considering global warming, acidification and human toxicity categories. Ecotoxicity is dominated by leaching of pollutants from the concrete material, where Cr and Sb play a major role. Compared to landfilling of the same waste stream, reuse in road construction provides lower burdens for global warming, acidification and human toxicity categories, while ecotoxicity impacts are much larger, due to the larger leached amounts and the absence of any collection and treatment system.
Sardinia 2013, Fourteenth International Waste Management and Landfill Symposium, 2013
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Sardinia 2013 - 14th International Waste Management and Landfill Symposium