Comparative Environmental Analysis of Embankments Constructed from Conventional Materials and Industrial By-products

摘要: Industrial byproducts such as coal fly ash, bottom and steel slags are being used in considerable amounts a full or partial replacement of the natural aggregate. However, higher concentrations heavy metals other toxic organic pollutants these raise concern among policy makers stakeholders. The goal this study was to develop decision making tool for comparison industrial conventional materials embankment construction road. A with carried out respect cost, environmental generated, energy consumption. For purpose, an Excel - based model developed analysis. cradle-to-grave approach taken data collection. Loading different subdivided into impact categories, consumption, global warming potential, acidification potential various toxicity potentials. assessment potentials, all toxicities were represented 1, 4 dicholorobenzene using characterization factors by Huijbregts. An uncertainty analysis also undertaken due variability leaching from metals. It found that use byproducts, especially ash reduced green house gas emission 20 year, 100 500 year time periods. increased some fresh aquatic ecotoxicity sediment ecotoxicity, because concentration leachate generated their animals. periods, had lower human terrestrial compared aggregates. sensitivity revealed cadmium, cobalt, copper most sensitive parameters byproducts.