Abstract
Moisture-induced damage has long been recognized as one of the major concerns for asphalt pavements. To mitigate potential moisture damage, one general method is to add mineral antistripping additives or liquid antistripping agents into hot-mix asphalt (HMA) mixtures. In this study, a comparative laboratory experiment was conducted to investigate the effectiveness of cementitious fillers on moisture susceptibility of HMA mixtures. Five types of cementitious fillers were considered: fly ash, cement kiln dust, and three types of hydrated lime with different finenesses. The laboratory performance of HMA mixtures subjected to moisture conditioning was evaluated through the following tests: dynamic modulus test; superpave indirect tensile tests; and tensile strength ratio test. The test results indicate that the cementitious fillers were generally effective in reducing the moisture susceptibility of HMA mixtures. The finer the hydrated lime particle, the more resistant the asphalt mixtures. In addition, dynamic shear rheometer test was conducted on asphalt mastics to explore the stiffening effect of different cementitious fillers.
Original language | English |
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Article number | 006007QMT |
Pages (from-to) | 667-673 |
Number of pages | 7 |
Journal | Journal of Materials in Civil Engineering |
Volume | 22 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2010 |
Scopus Subject Areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science
- Mechanics of Materials
Keywords
- $Moisture damage$Cementitious filler$Fineness$Stiffening effect
- Cementitious filler
- Fineness
- Moisture damage
- Stiffening effect