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Utvärdering av gummiasfalt: provväg E22 Mönsterås : etapp 1
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-6327-4709
Swedish National Road and Transport Research Institute, Infrastructure, Measurement technology and engineering workshop.
Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.ORCID iD: 0000-0002-9893-0067
2019 (Swedish)Report (Other academic)Alternative title
Evaluation rubber modified asphalt pavement section : test road E22 Mönsterås : phase 1 (English)
Abstract [sv]

Laboratorieundersökningar och vägytemätningar utfördes på referens- och gummimodifierade asfaltbeläggningar på E22 Mönsterås.

Laboratorieundersökningarna visar inte några tydliga skillnader i styvhet och skjuvmodul mellan massorna. Gummiasfalt har dock lägre fasvinkel jämfört med referens vilket betyder att gummiasfalten är mer elastisk. Gummiasfalten visar också lite lägre modul i låga temperaturer och lite högre modul i höga temperaturer vilket är bra för sprickbildning vid låga temperaturer respektive deformationsstabilitet. Utmattningsprovningen visar att gummiasfalt har något bättre utmattningsegenskaper men skillnaderna är inte signifikanta.

De initiala fältmätningarna visar inte på några framträdande skillnader mellan sträckorna utan mätresultaten är väldigt likvärdiga. Det är dock för tidigt att dra slutsatser efter mindre än ett års trafik och fortsatta tillståndutvecklingen bör följas ytterligare innan slutsatser kan dras. Någon skillnad i spårbildning mellan sträckorna kan inte fastställas p.g.a. systematiska variationer inom provsträckan.

Abstract [en]

Laboratory and filed investigations have been carried out to evaluate the performance of rubber modified asphalt test road on E22 Mönsterås.

The laboratory investigations indicated that there are no significant differences in stiffness and shear modulus between the reference and rubber modified mixtures. The rubber modified mixture however showed slightly lower phase angle compared to the reference mixture which indicate that the rubber modified mixture is more elastic. The rubber modified mixtures also showed lower modulus at lower temperatures and slightly higher modulus at higher temperature which are desired properties for resistance against low temperature cracking and permanent deformation respectively. The fatigue tests indicated that the rubber modified asphalt mixture has slightly better fatigue cracking performance. But the difference is not significant.

The road surface profile measurements indicated no significant differences between the reference and asphalt rubber sections. It is however early to draw conclusions after one year of traffic therefore additional follow-up of the test sections is needed to draw a conclusion.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2019. , p. 25
Series
VTI notat ; 6-2019
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:vti:diva-13749OAI: oai:DiVA.org:vti-13749DiVA, id: diva2:1314006
Available from: 2019-05-07 Created: 2019-05-07 Last updated: 2019-05-07Bibliographically approved

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