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Fracture toughness evaluation of bituminous binders at low temperatures
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsmaterial.
2015 (engelsk)Inngår i: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 48, nr 9, s. 3049-3058Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

When asphalt roads turn brittle at low temperatures, they are no longer able to relax completely from traffic induced stresses and may also suffer damage through crack initiation and propagation. In order to avoid early structural damages, the bituminous binders must be selected very carefully. However, conventional test methods for assessing performance of bituminous binders at low temperatures are often unsatisfactory reliable, in particular in case of polymer modified bituminous binders. In this study, an alternative experimental method based on fracture mechanical principles was performed on pre-notched specimens in the brittle state inside a cooling media. This fracture toughness test was evaluated in terms of its suitability for distinguishing different types of polymer modified and unmodified bituminous binders. In addition, the feasibility to evaluate different ageing states was also analysed by testing samples after artificial short-term and long-term ageing procedures. The repeatability obtained from the experimental results showed that the fracture toughness test is a suitable candidate for being introduced in a standardization framework.

sted, utgiver, år, opplag, sider
2015. Vol. 48, nr 9, s. 3049-3058
Emneord [en]
Fracture toughness test, Low temperature behaviour, Polymer modified bituminous binder, Thermal cracking, Asphalt road, Bitumen
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-172670DOI: 10.1617/s11527-014-0378-4ISI: 000358603100022Scopus ID: 2-s2.0-84938287898OAI: oai:DiVA.org:kth-172670DiVA, id: diva2:850338
Merknad

QC 20150901

Tilgjengelig fra: 2015-09-01 Laget: 2015-08-27 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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