Study of Fatigue-Damage Characteristics of Recycled Asphalt Mixture

Wang, Lan; Zhen, Zhao; Guo, Zhaoyang; Liu, Heng

doi:10.1061/(asce)mt.1943-5533.0004566

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…In order to investigate the effect of recycling agent addition on the high-temperature performance of aged asphalt, the high-temperature performance of neat asphalt, aged asphalt, and aged asphalt with different dosages of recycling agent was analyzed through the temperature sweep test. Moreover, the high-temperature performance and fatigue performance of asphalt were evaluated using phase angle (δ), complex shear modulus (G * ) [26], storage modulus ([G (ω)]), rutting factor (|G * | sin δ) [27], and fatigue factor (G * / sin δ). The load frequency of the test was 10 rad/s, the test temperature was 52~76 • C (6 • C interval), the diameter of the parallel plate was 25 mm, and the gap of the parallel plate was (2 ± 0.05) mm.…”

Section: Temperature Sweep Testmentioning

confidence: 99%

Study on the Performance and Mechanism of Cold-Recycled Asphalt Based on Permeable Recycling Agent

Cheng,

Qiao,

Zheng

et al. 2023

Materials

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In order to investigate the influence of recycling agent composition on the recycling effect of aged asphalt in the cold recycling process, the design and optimization of cold recycling agent composition were performed through the central composite design-response surface method combined with the dynamic shear rheometer (DSR) test and the bending beam rheometer (BBR) test. The molecular weight distribution and component changes in aged asphalt before and after the addition of a cold recycling agent were also analyzed by gel permeation chromatography (GPC) and hydrogen-flame ionization test. The results showed that the permeable cold recycling agent has a recycling effect on the aged asphalt, but its effectiveness is greatly affected by recycling agent composition. The best recycling effect was achieved when the ratio of aromatic oil and penetrant in the cold recycling agent was 61.2:38.8, respectively. In terms of the recycling agent and aromatic functional groups in the aromatic oil, the aromatics in the recycling agent are derived from the aromatic oils, and the penetrant is only fused and permeated with the aromatic oils. After the admixture of the cold recycling agent, the penetrant in the recycling agent allows the aromatic oil to enter the aged asphalt at room temperature. The light components volatilized by aging are replenished, allowing the aged asphalt to recover some of its properties.

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Section: Temperature Sweep Testmentioning

confidence: 99%