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Ballastberoende slitage på asfalt och betong: provning enligt Prall
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-5665-8288
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology. VTI.ORCID iD: 0000-0001-7440-3572
2020 (Swedish)Report (Other academic)Alternative title
Aggregate depending wear on asphalt concrete and cement concrete : testing according to Prall (English)
Abstract [sv]

Betongvägsträckan på E4 utanför Uppsala har ett antal år efter konstruktion uppvisat en accelererande spårtillväxt som inte kunnat förklaras av ökad trafik. Entreprenörens egenkontroll visar att ballast från två olika täkter med olika stenkvalitet sammanblandats för att klara kravet på kulkvarnsvärde. I denna rapport undersöks på vilket sätt slitaget påverkas då olika proportioner av en sekundär ballast blandas in i beläggningsmaterialet. Sju serier provkroppar, tillverkade av asfalt respektive betong, med olika andelar primär och sekundär ballast blandas och testas enligt Prall för att studera nötningsmotståndet från dubbdäckstrafik. Resultaten visar en närmast linjär förändring av slitage då andelen sekundär ballast i fraktionen 8–16 mm ändras. Det står också klart att ballasten i fraktionen 4–8 mm inte påverkar nötningsmotståndet.

Abstract [en]

The concrete pavement section on E4 outside Uppsala has a few years after construction shown an accelerating rut depth increase which can not be explained by an increased traffic volume. The contactor’s self inspection protocol shows that aggregates from two different quarries with different rock qualities have been mixed in order to fulfill the ball mill value requirement. The way that the abrasive wear is affected when different proportions of a secondary aggregate quality is mixed into the pavement material is studied in this report. Seven series of laboratory specimens, consisting of asphalt concrete and cement concrete, respectively, with different parts of primary and secondary aggregates are mixed and tested according to Prall to study the resistance to wear due to studded tires. The results show an almost linear change of the abrasive wear when the proportion of the secondary aggregate is changed in the 8–16 mm fraction. It also becomes clear that the aggregates in the 4–8 mm fraction do not affect the resistance to wear.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2020. , p. 23
Series
VTI rapport, ISSN 0347-6030 ; 1044
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:vti:diva-15242OAI: oai:DiVA.org:vti-15242DiVA, id: diva2:1430389
Available from: 2020-05-14 Created: 2020-05-14 Last updated: 2020-05-14Bibliographically approved

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Bjurström, HenrikDolk, Ellen

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34567896 of 14
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