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Moisture susceptibility of warm mix asphalt
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
2014 (English)In: Indian journal of engineering & materials sciences, ISSN 0971-4588, E-ISSN 0975-1017, Vol. 21, no 6, 683-691 p.Article in journal (Refereed) Published
Abstract [en]

In this study, moisture susceptibility characteristics of wax modified bitumens and warm mix asphalt (WMA) mixtures are determined. The asphalt mixtures are prepared with 50170 penetration grade unmodified bitumen and modified bitumens with three different types of additives (Fischer Tropsch wax, montan wax and polyethylene wax) by weight of 6%. The moisture susceptibility characteristic of the four bitumens is determined with Sessile drop method and that for asphalt mixtures is determined with Nicholson stripping test on loose asphalt mixtures and Modified Lottman test on compacted asphalt mixtures. Furthermore, Marshall stability with different blow numbers of WMA mixtures are determined. The findings from all of these tests suggest that due to the Fischer Tropsch wax and montan wax modification the asphalt mixture become more moisture susceptible which correlates with the surface energy characterization. Interestingly, polyethylene wax modification shows positive moisture performance.

Place, publisher, year, edition, pages
2014. Vol. 21, no 6, 683-691 p.
Keyword [en]
Warm mix asphalt, Moisture susceptibility, Modified Lottman test, Sessile drop method
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-161563ISI: 000349730100011ScopusID: 2-s2.0-84922503611OAI: diva2:798376

QC 20150326

Available from: 2015-03-26 Created: 2015-03-13 Last updated: 2015-03-26Bibliographically approved

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Das, Prabir Kumar
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