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Research on the Performance and Modification Mechanism of Gutta-Percha-Modified Asphalt
Simeng Yan1,2, Shichao Cui1, Naisheng Guo1
1College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China.
Polymers
|July 13, 2024
Summary
Gutta-percha (GP) modified asphalt shows enhanced high-temperature performance. While eucommia ulmoides gum (EUG) is compatible, sulfur-vulcanized EUG (SEUG) is not, yet both improve thermal stability and deformation resistance.
Area of Science:
- Materials Science
- Civil Engineering
- Polymer Chemistry
Background:
- Growing demand for high-performance, sustainable asphalt modifiers.
- Gutta-percha (GP) as a potential novel asphalt modifier is under investigation.
- Understanding modification mechanisms and compatibility is crucial for asphalt enhancement.
Purpose of the Study:
- To evaluate the performance and modification mechanism of gutta-percha (GP) in asphalt.
- To assess the compatibility of GP with asphalt using molecular modeling.
- To determine optimal processing conditions for GP-modified asphalt (GPMA).
Main Methods:
- Molecular dynamics simulations for compatibility and mixing temperature.
- Gray correlation theory for optimal preparation method.
- Macro-rheological tests and microscopic performance analysis.
Main Results:
- Eucommia ulmoides gum (EUG) shows good asphalt compatibility; sulfur-vulcanized EUG (SEUG) shows poor compatibility.
- Both EUG and SEUG enhance asphalt's high-temperature thermal stability and resistance to deformation.
- Neither additive improves low-temperature cracking resistance.
Conclusions:
- EUG and SEUG can improve specific asphalt properties, particularly at high temperatures.
- Processing methods differ: EUG requires physical mixing, SEUG involves chemical processes.
- This study provides a theoretical basis for developing GP as an eco-friendly asphalt modifier.
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