Long-term behaviour, environmental load and financial consequences of stabilised hazardous wastes used as sub-base material

In some cases there is no agreement about the financial and environmental 'costs' and 'benefits' in the replacement of 'traditional' sub-base materials by stabilized wastes. A Decision Support System might help choosing between the use of a traditional building material or a stabilized hazardous waste as sub-base material. Research at Delft University of Technology resulted in the Decision Support System 'MAATSTAF' (=STANDARD) for stabilized/solidified hazardous wastes. This DSS selects effective alternatives for hazardous wastes, like useful application as a sub-base material. Most important part of the DSS is the criterion 'long term behaviour', which calculates the release of hazardous components due to degradation factors at the building site. Therefore, leaching and durability tests are carried out on stabilized and non-stabilized industrial purification sludge and traditional sub-base material. Besides that, the DSS contains the criteria 'environmental load and 'financial consequences' with means respectively a Life Cycle Assessment and a Life Cycle Costing. The assessment STANDARD is carried out on: the useful application of Stabilized/Solidified industrial purification sludge (alternative 1), dump of industrial purification sludge (alternative 2) and dump of Stabilized/Solidified-industrial purification sludge (alternative 3). The results show that for each set of priorities, alternative 2 is more preferable than alternative 3. If 'financial consequences' are thought to be of great importance, alternative 1 is preferable above alternative 2. In other cases alternative 2 is the most desirable according to the output data of this assessment. A sensitivity analysis does not change these conclusions.

Language

  • English

Media Info

  • Pagination: 13p
  • Monograph Title: First International Symposium on Subgrade Stabilisation and In Situ Pavement Recycling Using Cement, Salamanca, Spain, 1-4 October 2001

Subject/Index Terms

Filing Info

  • Accession Number: 01392464
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 8489875278
  • Files: ATRI
  • Created Date: Aug 23 2012 7:09AM