TY - GEN

T1 - Characterisation of MSWI bottom ash for potential use as subbase in Greenlandic road construction

A1 - Kirkelund,Gunvor Marie

A1 - Jørgensen,Anders Stuhr

A1 - Ingeman-Nielsen,Thomas

A1 - Villumsen,Arne

AU - Kirkelund,Gunvor Marie

AU - Jørgensen,Anders Stuhr

AU - Ingeman-Nielsen,Thomas

AU - Villumsen,Arne

PY - 2012

Y1 - 2012

N2 - 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<br/>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.

AB - 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<br/>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.

KW - MSWI bottom ash

KW - Road construction

KW - Mechanical properties

KW - Heavy metals

KW - Leaching

BT - The 4th International Conference on Engineering for Waste and Biomass Valorisation (WasteEng12)

T2 - The 4th International Conference on Engineering for Waste and Biomass Valorisation (WasteEng12)

SP - 835

EP - 840

ER -