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- W3038387419 endingPage "119939" @default.
- W3038387419 startingPage "119939" @default.
- W3038387419 abstract "Abstract In cold regions, asphalt concrete cracking caused by low temperature is known as the most important type of damage to asphaltic surfaces pavements. In rainy areas, the cold may cause asphalt freezing and due to this reason, the asphalt damages would be doubled. In recent years, thermal cracking characteristics of asphalt concrete have been investigated using the fracture mechanics approach. However, the effect of freeze–thaw cycles and thermal cracking simultaneously has not been studied so far. Therefore, the main objective of this research is to investigate the effect of freeze–thaw cycles on thermal cracking characteristics of saturated asphalt concrete mixtures subjected to mixed mode I/II loading using the fracture mechanics approach. The combined influence of water saturation and freezing/thawing mechanism on low temperature cracking behavior of asphalt concrete is an important real condition happening in the field that should be considered by the pavement designers. For this purpose, several asphaltic samples in the form of SCB (Semi-Circular Bend) specimen were fabricated with similar grading, material and manufacture conditions. Then they were saturated and exposed to six freeze–thaw cycles (1, 3, 5, 7, 9, 11) and were tested at three different low temperatures (−5°C, −15 °C and −20 °C). The effects of these parameters on critical stress intensity factors were studied on four failure modes (i.e. pure mode I, pure mode II and two different mixed modes I/II). The result of this study shows that the fracture toughness will be decreased significantly by increasing the number of freeze–thaw cycles. However, after seven cycles the rate of fracture toughness reduction becomes constant. Also, by reducing the temperature to −15 °C, the effective stress intensity factor (Keff) rises, and more reduction in the temperature causes Keff to decrease." @default.
- W3038387419 created "2020-07-10" @default.
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- W3038387419 date "2020-11-01" @default.
- W3038387419 modified "2023-10-12" @default.
- W3038387419 title "Impact of freeze–thaw cycles on low temperature mixed mode I/II cracking properties of water saturated hot mix asphalt: An experimental study" @default.
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- W3038387419 doi "https://doi.org/10.1016/j.conbuildmat.2020.119939" @default.
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