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Automated Non-contact Resonance Excitation Method to Assess Low Temperature Dynamic Modulus of Asphalt Concrete
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
Peab Asfalt AB, Drivhjulsvagen 11, S-12630 Hagersten, Sweden..
Texas A&M Univ, Dept Civil Engn, College Stn, TX 77843 USA..
2019 (English)In: Journal of nondestructive evaluation, ISSN 0195-9298, E-ISSN 1573-4862, Vol. 38, no 2, article id 43Article in journal (Refereed) Published
Abstract [en]

This paper studies the applicability of an automated non-destructive testing method to monitor the stiffness of asphalt concrete at low temperatures. A loudspeaker is used as a source of non-contact excitation of the axially symmetric fundamental resonant frequencies of a disc-shaped asphalt concrete specimen positioned inside an environmental chamber. Measured resonant frequencies are used to calculate the dynamic moduli of the specimen at different temperatures. The repeatability of the method as well as the effect of loudspeaker height above the sample are studied. Results show that the main advantage of the non-contact excitation method, compared to manually applied impact hammer excitation, is that repeatable automated measurements can be performed while the specimen is placed inside an environmental temperature chamber. This methodology enables to study the effect of only low temperature conditioning on the dynamic modulus of asphalt concrete without interference from mechanical loading.

Place, publisher, year, edition, pages
SPRINGER/PLENUM PUBLISHERS , 2019. Vol. 38, no 2, article id 43
Keywords [en]
Resonant frequency, Non-contact resonance, Dynamic modulus, Asphalt concrete
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-249763DOI: 10.1007/s10921-019-0584-7ISI: 000463664300001Scopus ID: 2-s2.0-85063615325OAI: oai:DiVA.org:kth-249763DiVA, id: diva2:1307663
Note

QC 20190429

Available from: 2019-04-29 Created: 2019-04-29 Last updated: 2019-04-29Bibliographically approved

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Rydén, Nils

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