What does AR stand for in asphalt binder grading?

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Multiple Choice

What does AR stand for in asphalt binder grading?

Explanation:
AR stands for Recovered (aged) Grade. In asphalt binder grading, the original (unaged) grade shows the binder’s properties before aging, while the AR value reflects the binder’s properties after it has aged in the lab to simulate long-term aging. Aging makes the binder stiffer and more susceptible to rutting, so the AR grade is used to assess how the pavement will perform over time. Tack coat and prime coat are surface applications, not binder grades, and the original (unaged) grade describes the fresh state, not the aged state.

AR stands for Recovered (aged) Grade. In asphalt binder grading, the original (unaged) grade shows the binder’s properties before aging, while the AR value reflects the binder’s properties after it has aged in the lab to simulate long-term aging. Aging makes the binder stiffer and more susceptible to rutting, so the AR grade is used to assess how the pavement will perform over time. Tack coat and prime coat are surface applications, not binder grades, and the original (unaged) grade describes the fresh state, not the aged state.

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