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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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Abstract
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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