Mode I Fracture Toughness (KIc) Investigation Under Low-Temperature Conditions for Asphaltic Mixtures Containing Different Percentages of Steel Slag Filler

Document Type : Research Paper

Authors

1 PhD Student in Road and Transportation, Department of Civil Engineering, Payame Noor University, North Tehran Branch, I. R. Iran.

2 Associate Professor in Road and Transportation, Department of Civil Engineering, Payame Noor University, North Tehran Branch, I. R. Iran.

3 Professor in Road and Transportation, Department of Civil Engineering, Payame Noor University, North Tehran Branch, I. R. Iran.

Abstract

In general, mode I loading (pure tension) on the road surface occurs when the crack is placed between the front and rear wheels of the pavement. The results of this research indicate that the amount of fracture toughness depends on factors such as the test temperature, the thickness of the piece, the percentage of free space, and also the parameters of the geometry of the piece. Most of the researches conducted on one or two loading modes are based on the environmental characteristics of asphalt mixtures, and the geometrical conditions of asphalt mixture samples, including their cut thickness and the effect of different percentages of filler on the samples, have not been paid attention to. Therefore, in this research, the issue of how the geometrical characteristics of the part can affect the failure toughness of the bending half-disk samples under Mode I loading has been investigated. According to the obtained results, it was observed that as the cutting thickness of the piece increases, more force is required to break the sample.

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Main Subjects

References

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History

  • Receive Date: 06 October 2024
  • Revise Date: 09 November 2024
  • Accept Date: 26 November 2024

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