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Steel slags in a landfill top cover: Experiences from a full-scale experiment
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0002-9715-975X
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0001-7158-4662
2014 (Engelska)Ingår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 34, nr 3, s. 692-701Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A full scale field study has been carried out in order to test and evaluate the use of slags from high-alloy steel production as the construction materials for a final cover of an old municipal landfill. Five test areas were built using different slag mixtures within the barrier layer (liner). The cover consisted of a foundation layer, a liner with a thickness of 0.7 m, a drainage layer of 0.3 m, a protection layer of 1.5 m and a vegetation layer of 0.25 m. The infiltration varied depending on the cover design used, mainly the liner recipe but also over time and was related to seasons and precipitation intensity. The test areas with liners composed of 50% electric arc furnace (EAF) slag and 50% cementitious ladle slag (LS) on a weight basis and with a proper consistence of the protection layer were found to meet the Swedish infiltration criteria of ⩽50 l (m2 a)−1 for final covers for landfills for non-hazardous waste: the cumulative infiltration rates to date were 44, 19 and 0.4 l (m2 a)−1 for A1, A4 and A5, respectively. Compared to the precipitation, the portion of leachate was always lower after the summer despite high precipitation from June to August. The main reason for this is evapotranspiration but also the fact that the time delay in the leachate formation following a precipitation event has a stronger effect during the shorter summer sampling periods than the long winter periods. Conventional techniques and equipment can be used but close cooperation between all involved partners is crucial in order to achieve the required performance of the cover. This includes planning, method and equipment testing and quality assurance.

Ort, förlag, år, upplaga, sidor
2014. Vol. 34, nr 3, s. 692-701
Nationell ämneskategori
Annan naturresursteknik
Forskningsämne
Avfallsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-7414DOI: 10.1016/j.wasman.2013.12.003ISI: 000332266100013PubMedID: 24393476Scopus ID: 2-s2.0-84893787800Lokalt ID: 5ca6d855-77a6-4d3d-9680-b579df6996a8OAI: oai:DiVA.org:ltu-7414DiVA, id: diva2:980303
Anmärkning
Validerad; 2014; 20140107 (andbra)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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Andreas, LaleDiener, SilviaLagerkvist, Anders

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