Effects of Antioxidant-Intercalated LDHs on Long-Term Thermal Oxidation Aging and Ultraviolet Aging Resistances of SBS-Modified Asphalt
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 8
Abstract
This research aimed to enhance the ultraviolet aging and long-term thermal oxidation aging resistances of styrene-butadiene-styrene (SBS)-modified asphalt simultaneously. For this purpose, antioxidant 1222–intercalated ultraviolet (UV) shielding material layered double hydroxides (LDHs) (LDHs-1222) were prepared and added into SBS-modified asphalt as an antiaging agent. The effect of LDHs-1222 on the physical properties, high and low temperature rheology, and chemical composition of SBS-modified asphalt was investigated. Meanwhile, the aging properties of the asphalts after short-term or long-term thermo-oxidative aging and 7-day ultraviolet aging were investigated. The results showed that LDHs-1222 significantly improved the resistance of SBS-modified asphalt to short-term thermo-oxidative, long-term thermo-oxidative, and UV aging while having less impact on the physical and rheological properties than LDHs. Compared with SBS-modified asphalt, the softening point increment, aging indices of viscosity, complex modulus and carbonyl index, and SBS index decrement of the asphalt with LDHs-1222 were significantly reduced, and their growth rates were significantly slowed, indicating that the aging rate and degree of SBS-modified asphalt were reduced by the addition of LDHs-1222. SBS-modified asphalt with 4% LDHs-1222 exhibited superior resistance to long-term thermal oxidation and UV aging compared to asphalt with an equivalent amount of LDHs.
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Data Availability Statement
All data that support the findings of this study appear in the published article.
Acknowledgments
The paper was funded by the National Natural Science Foundation of China (Nos. 52378462 and 52278440) and the Open Foundation of State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) (SYSJJ2021-03 and SYSJJ2022-21).
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Oct 25, 2023
Accepted: Jan 9, 2024
Published online: May 17, 2024
Published in print: Aug 1, 2024
Discussion open until: Oct 17, 2024
ASCE Technical Topics:
- Aging (material)
- Chemical processes
- Chemistry
- Design (by type)
- Deterioration
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Environmental engineering
- Load and resistance factor design
- Load factors
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Oxidation
- Radiation
- Rubber
- Structural design
- Thermal properties
- Thermodynamics
- Ultraviolet radiation
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