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Återvinning av MJOG/MJAG i varmblandad asfalt (halvvarmt i varmt): Malmtransportväg Kaunisvaara – Svappavaara (MaKS)
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-3648-3759
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
Swedish National Road and Transport Research Institute, Infrastructure.
2015 (Swedish)Report (Other academic)Alternative title
Recycling of soft asphalt (MJOG/MJAG) in hot mix asphalt (English)
Abstract [sv]

Syftet med denna undersökning var att se i vilken grad man kan blanda in gamla asfaltbeläggningar som granulat i nytillverkad varmasfalt utan att försämra egenskaperna hos den nya beläggningen. Vägen mellan Kaunisvaara och Svappavaara behövde rustas upp på grund av kraftigt ökande malmtransporter med mycket tunga fordon (90 ton) framöver. För att se om den gamla beläggningen kunde användas som granulat i nytillverkad varmasfalt planerades fyra provsträckor med olika halter av gamla asfaltbeläggningar. De alternativ som testats är 0 procent inblandning (referensmassa) samt 10, 20 och 30 procent granulatinblandning. Asfaltmassa från dessa fyra provsträckor har skickats till VTI för analys. Förutom grundläggande data av bindemedelshalt och kornkurva har bindemedelsegenskaper på återvunnet bitumen utförts (penetration och mjukpunkt) samt bestämning av hålrumshalt och styvhetsmodul vid +10 °C på borrkärnor från laboratorietillverkade plattor. Resultaten visar att materialet från provsträckorna med granulat är likvärdiga med referensmassan avseende styvhetmodul vid +10 °C. Undersökningen indikerar därmed att tekniken med att blanda återvunnen mjukasfalt i varmasfalt fungerat väl i halter upp till 30 procent. Vägen bör följas upp framöver för att studera eventuella skillnader mellan de olika provsträckorna över tiden med beaktande av hur omfattande den tunga trafiken kommer att vara längs denna vägsträcka.

Abstract [en]

The road between Kaunisvaara and Svappavaara in the north of Sweden needs to be upgraded, as an increase of very heavy mining vehicles (90 tonnes) is expected in the future. The route consists mainly of old soft asphalt pavement. The purpose of this study is to evaluate to what extent one can mix these old asphalt pavements as granules in the newly made hot asphalt without impairing the properties of the new pavement. Mixes with 0 per cent (reference), 10 per cent, 20 per cent and 30 per cent granules were selected for evaluation. Asphalt from these four sections have been sent to VTI for analysis. In addition to basic data, such as sieve analyses and binder content, analyses of binder properties of recycled bitumen have been carried out (penetration and softening point). Determination of void content and stiffness modules at +10 °C performed on cores from laboratory compacted slabs. The results show that the material from the different mix with granules is equivalent to the reference mix with respect to stiffness modulus at +10 °C. The study indicates that the technique of mixing the recycled soft asphalt in hot asphalt worked well in amounts up to 30 per cent. The road should be monitored in the future in order to study if differences between test sections will appear over time, with regard to the high volume of the heavy vehicles along this road.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2015. , 34 p.
Series
VTI notat, 18-2015
Keyword [en]
Bituminous mixture, Recycling (mater), Remixing, Granular, Hot coated material, Experimental road, Repaving, Test, Laboratory (not an organization), Particle size distribution, Voids ratio, Binder content, Stiffness
National Category
Other Materials Engineering
Research subject
50 Road: Materials, 51 Road: Bituminous materials and binders
Identifiers
URN: urn:nbn:se:vti:diva-7944OAI: oai:DiVA.org:vti-7944DiVA: diva2:840736
Available from: 2015-07-09 Created: 2015-07-09 Last updated: 2016-04-12Bibliographically approved

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