LCA of alternative granular materials – Assessment of ecotoxicity and toxicty for road case studies

International audienceThis paper assesses alternative granular material use as regards ecotoxicity and toxicity. Stockpiling and use in various roads are considered. Leachates datasets of materials and field tests are collected from literature, the study is focused on MSWI BA, RAP and FS. LCIs due to leaching and percolation are built. Corresponding impacts were determined using a mid-point method: the EP TP results exhibit significant differences between the resources in favour of including such impact to LCA for recycling assessment. A model to allocate all the leaching potential to the alternative resource is proposed and discussed for better assessment within LCA framework

Use of industrial waste as a substitute for conventional aggregates in asphalt pavements: A review

The need to save natural resources has paradigmatic attitude changes, such as the need to value waste materials in order to reduce landfill and minimize the use of raw materials. The objective of this work is to show the contribution of existing literature about the incorporation of industrial wastes in asphalt pavements. Thus, some of the main industrial wastes that can be incorporated in asphalt mixtures as aggregate substitute are steel slag, foundry sand and fly ash. This wastes are produced on a large scale on the planet, and the literature shows that, when treated for use in road pavements, their mechanical properties are similar or superior to conventional aggregates. Thus, according to the studies presented here, the incorporation rates vary from 5 to 15% for foundry sand, 70% for steel slag and 30% for fly ash. When incorporated in asphalt pavements, the dangerous elements may be encapsulated in the mixture, reducing their environmental toxicity.(undefined)info:eu-repo/semantics/publishedVersio