Accelerated carbonation of steel slags in a landfill cover construction
- Division of Waste Science and Technology, Lulea University of Technology, 971 87 Lulea (Sweden)
- Civil and Materials Engineering, Vattenfall Research and Development AB, SE-814 26 Alvkarleby (Sweden)
Steel slags from high-alloyed tool steel production were used in a full scale cover construction of a municipal solid waste (MSW) landfill. In order to study the long-term stability of the steel slags within the final cover, a laboratory experiment was performed. The effect on the ageing process, due to i.e. carbonation, exerted by five different factors resembling both the material characteristics and the environmental conditions is investigated. Leaching behaviour, acid neutralization capacity and mineralogy (evaluated by means of X-ray diffraction, XRD, and thermogravimetry/differential thermal analysis, TG/DTA) are tested after different periods of ageing under different conditions. Samples aged for 3 and 10 months were evaluated in this paper. Multivariate data analysis was used for data evaluation. The results indicate that among the investigated factors, ageing time and carbon dioxide content of the atmosphere were able to exert the most relevant effect. However, further investigations are required in order to clarify the role of the temperature.
- OSTI ID:
- 21357634
- Journal Information:
- Waste Management, Vol. 30, Issue 1; Other Information: DOI: 10.1016/j.wasman.2009.08.007; PII: S0956-053X(09)00349-3; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AGING
AIR POLLUTION
CARBON DIOXIDE
COVERINGS
DIFFERENTIAL THERMAL ANALYSIS
ENVIRONMENTAL QUALITY
LEACHING
MULTIVARIATE ANALYSIS
MUNICIPAL WASTES
SANITARY LANDFILLS
SOLID WASTES
STEELS
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION
ALLOYS
CARBON ADDITIONS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COHERENT SCATTERING
DIFFRACTION
DISSOLUTION
GRAVIMETRIC ANALYSIS
IRON ALLOYS
IRON BASE ALLOYS
MANAGEMENT
MATHEMATICS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SEPARATION PROCESSES
STATISTICS
THERMAL ANALYSIS
TRANSITION ELEMENT ALLOYS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES