What question did this study set out to answer?

To investigate how coupling different environmental media (water, acid, and salt) with ultraviolet radiation affects the rheological and structural aging properties of rubber asphalt.

July 30, 2020MaterialsOpen Access

Influence of Different Aging Environments on Rheological Behavior and Structural Properties of Rubber Asphalt

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Authors

YZYuhao ZhangHuazhong University of Science and Technology HWHui WeiXinjiang Institute of Engineering YDYinhan Dai

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Implication

Experimental simulation demonstrates that acidic and saline media accelerate ultraviolet aging in rubber asphalt, indicating heightened vulnerability to low-temperature fatigue damage.

Key Points

To investigate how coupling different environmental media (water, acid, and salt) with ultraviolet radiation affects the rheological and structural aging properties of rubber asphalt.
Simulated environmental aging using a custom ultraviolet environment chamber integrated with water, acid, and salt media.
Evaluated physical and rheological changes by measuring penetration, softening point, creep compliance, rutting factor, and stiffness modulus.
Characterized chemical and microstructural alterations by analyzing oxygen absorption reactions, carbonyl and sulfoxide infrared absorption peaks, and colloid-to-gel structural transitions.
Acid medium coupled with ultraviolet radiation caused the greatest aging acceleration, increasing softening point, rutting factor, and stiffness modulus while reducing penetration and creep compliance.
Aged rubber asphalt showed improved high-temperature stability but suffered diminished low-temperature performance and increased susceptibility to fatigue cracking.
Ultraviolet and chemical exposure accelerated oxygen absorption, elevating carbonyl and sulfoxide functional groups and shifting lighter asphalt fractions into heavy components to form a rigid gel structure.

Cite This Study

Zhang et al. (2020) studied this question.

synapsesocial.com/papers/6a94ccd557dad826d8f57789 https://doi.org/10.3390/ma13153376

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Implication

Experimental simulation demonstrates that acidic and saline media accelerate ultraviolet aging in rubber asphalt, indicating heightened vulnerability to low-temperature fatigue damage.

Influence of Different Aging Environments on Rheological Behavior and Structural Properties of Rubber Asphalt

Discussion

Member takes

Implication

Key Points

Cite This Study

Influence of Different Aging Environments on Rheological Behavior and Structural Properties of Rubber Asphalt

Discussion

Member takes

Implication

Key Points

Cite This Study

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