Characterisation of MSWI bottom ash for potential use as subbase in Greenlandic road construction

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

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The waste management situation in Greenland needs to be improved. Most waste in towns is incinerated with only limited separation prior to incineration and the bottom ash residue is disposed of at uncontrolled disposal sites. The bottom ash could be a valuable resource within the expansion of infrastructure due to increased oil and mineral exploitation. Thus, in this study MSWI bottom ash from a Greenlandic incinerator was tested for possible reuse as subbase in road construction. The mechanical properties (grain size distribution, wear resistance and bearing capacity) showed that the bottom ash was acceptable for reuse after some small adjustments in the grain size distribution to prevent frost sensitivity. Results obtained from heavy metal content and heavy metal leaching complied with the Danish guideline values for reuse of waste materials in construction. Leaching of Cu and Cr was high from small grain sizes and could be reduced by removing some of these smaller grain sizes to
obtain the stability requirement of the bottom ash. All in all, this study showed that the Greenlandic bottom ash has potential for being reused in road construction.
Original languageEnglish
TitleThe 4th International Conference on Engineering for Waste and Biomass Valorisation (WasteEng12) : Proceedings
Publication date2012
Pages835-840
StatePublished

Conference

Conference4th International Conference on Engineering for Waste and Biomass Valorisation
Number4
CountryPortugal
CityPorto
Period10/09/1213/09/12
Internet addresshttp://www.wasteeng2012.org/

Keywords

  • MSWI bottom ash, Road construction, Mechanical properties, Heavy metals, Leaching
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