What question did this study set out to answer?

To evaluate the mechanisms and efficacy of recycling agents in restoring aged recycled asphalt binder blends through rheological and physicochemical testing.

June 26, 2017Industrial & Engineering Chemistry Research

Compatibility of Recycled Binder Blends with Recycling Agents: Rheological and Physicochemical Evaluation of Rejuvenation and Aging Processes

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To evaluate the mechanisms and efficacy of recycling agents in restoring aged recycled asphalt binder blends through rheological and physicochemical testing.
Characterized asphalt binder blends by systematically varying recycling agent types, recycled material types and proportions, and base binder types.
Assessed performance across aging stages using rheological measures including PG grading, the Glover–Rowe parameter, and glass transition temperature determinations.
Rejuvenation successfully restored binder performance to PG 70-22 while decreasing the Glover–Rowe parameter and reducing glass transition temperature midpoints and endpoints.
Chemical characterization suggested strong polar interactions between recycling agents and asphaltenes, though the analytical results remained partially inconclusive.
Rheological performance gains achieved through rejuvenation progressively diminished under extended, long-term aging conditions.

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Implication

Laboratory evaluation demonstrates effective rejuvenation of aged recycled asphalt binders via agent-asphaltene interaction, indicating benefits diminish with long-term aging.

Cite This Study

Cucalón et al. (2017) studied this question.

synapsesocial.com/papers/6a1b6e4edb618aee6aabe2c6 https://doi.org/10.1021/acs.iecr.7b01657

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Implication

Laboratory evaluation demonstrates effective rejuvenation of aged recycled asphalt binders via agent-asphaltene interaction, indicating benefits diminish with long-term aging.

Compatibility of Recycled Binder Blends with Recycling Agents: Rheological and Physicochemical Evaluation of Rejuvenation and Aging Processes

Key Points

Discussion

Implication

Cite This Study

Compatibility of Recycled Binder Blends with Recycling Agents: Rheological and Physicochemical Evaluation of Rejuvenation and Aging Processes

Key Points

Discussion

Implication

Cite This Study

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