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ISSN 2029-7092 online
ISBN 978-609-457-690-4 CD
ISBN 978-609-457-640-9
 Roads and Railways

Adam Zofka , Maciej Maliszewski , Alexander Bernier

Alternative moisture sensitivity test

Conference Information: 9th International Conference on Environmental Engineering, MAY 22-24, 2014 Vilnius, LITHUANIA
Source: ICEE-2014 - International Conference on Environmental Engineering
Book Series: International Conference on Environmental Engineering (ICEE) Selected papers
ISSN: ISSN 2029-7092 online
ISBN: 978-609-457-640-9 / 978-609-457-690-4 CD
Year: 2014
Publisher: Vilnius Gediminas Technical University Press Technika

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This study examines recently proposed test method called the Moisture Induced Stress Tester (MiST). The primary objective of this test method is to identify stripping potential in asphalt materials. In the course of presented study, the MiST testing was performed on the hot- mix asphalt (HMA) field samples from six Long-Term Pavement Performance (LTPP) test sections in the US as well as on the field- and laboratory-compacted warm-mix asphalt (WMA) samples produced in a drum plant. Wearing surface cores from the LTPP test sections were evaluated in the MiST, and water samples before and after the test were analyzed using Infrared (IR) spectrometry. The warm-mix specimens were MiST conditioned and compared to the traditional Tensile Strength Ratio tests (AASHTO T283) as well as their bulk specific gravities were measured before and after the treatment. The results showed comparable results between MiST conditioning and the T283 for the HMA samples but similar comparison was not valid for the tested WMA specimens. Furthermore, the IR analysis identified significant peaks related to the asphalt presence at various concentrations in the water after testing, however additional data is needed in order to formulate more general conclusions from the observed trends.

Keywords: moisture damage; moisture susceptibility; tensile strength ratio.

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