Abstract
This paper focuses on the fracture damage characteristics of styrene-butadiene-styrene (SBS)-modified SMA-13 specimens with basalt fiber under various freeze-thaw (F-T) cycles. SBS-modified stone mastic asphalt (SMA)-13 specimens with basalt fiber were prepared, first, using the superpave gyratory compaction method. Then, asphalt mixture specimens processed with 0–21 F-T cycles were adopted for the high-temperature compression and low-temperature splitting tests. Meanwhile, the acoustic emission (AE) test was conducted to evaluate the fracture characteristics of the asphalt mixture during loading. The results showed that the AE parameters could effectively reflect the damage fracture characteristics of the asphalt mixture specimen during the high-temperature compression and low-temperature splitting processes. The fracture damage of the asphalt mixture specimens during compression or splitting are classified into three stages based on the variation of the AE signals, i.e., when the load level is below 0.1~0.2 during the first stage and the load level is 0.1–0.9 or 0.2–0.8 during the second stage. The AE signal amplitude and count show clear correlations with the compression and splitting load levels. Meanwhile, the AE signal clarifies the formation, development, and failure of internal damage for the asphalt mixture specimens during the compression and splitting processes. The intensity (value and density) of the AE signal parameters of asphalt mixture decreases with increasing F-T cycles. It is evident that the F-T cycle has a significant adverse effect on the mechanical strength of asphalt mixture, which makes asphalt mixtures more likely to cause early failure.
Highlights
Asphalt pavement has been widely used in the construction of high-grade highways due to its advantages such as good driving performance, high comfort, low noise, and convenient construction and maintenance [1,2]
The purpose was to correlate the fracture damage with Acoustic emission (AE) signal and study the effect of F-T cycles on SBS-modified asphalt mixture specimens with basalt fiber through a high-temperature compression test and low-temperature splitting test, and to study the fracture damage for the seasonal frozen area, which is affected by seasonality, i.e., freezing in winter and melting in summer
This paper evaluated the influence of freeze-thaw cycles on the performance degradation and fracture damage of SBS-modified asphalt mixtures with basalt fiber using the high-temperature compression test, low-temperature splitting test, and acoustic emission technique
Summary
Asphalt pavement has been widely used in the construction of high-grade highways due to its advantages such as good driving performance, high comfort, low noise, and convenient construction and maintenance [1,2]. Cheng et al [18] improved the use of diatomite and basalt fibers in asphalt mixture for a seasonal frozen area and analyzed the influences of F-T cycles on its strength and strain energy through indirect tensile tests. Hill et al [32] studied the warm mix asphalt prepared by using reclaimed asphalt pavement instead of aggregates and evaluated the high-temperature rutting, low-temperature cracking resistance, and moisture stability of asphalt mixtures with four additives combining acoustic emission test. The purpose was to correlate the fracture damage with AE signal and study the effect of F-T cycles on SBS-modified asphalt mixture specimens with basalt fiber through a high-temperature compression test and low-temperature splitting test, and to study the fracture damage for the seasonal frozen area, which is affected by seasonality, i.e., freezing in winter and melting in summer
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
