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Application of Mixed Shell Powder as Modifier and Filler in Asphalt Mixture
Chunyan Wang1, Yafan Yang2, Fangyuan Gong2
1School of Civil and Transportation, Henan Vocational University of Science Technology, No. 6 East Wenchang Avenue, Zhoukou 466000, China.
Materials (Basel, Switzerland)
|May 27, 2026
Summary
Shells, a marine waste, can enhance asphalt pavement performance in tropical islands. This study recommends using 9% shell powder in SBS-modified asphalt and replacing 50-100% of mineral filler with shell powder in asphalt mixtures, reducing costs and improving durability.
Area of Science:
- Materials Science
- Civil Engineering
- Environmental Science
Background:
- Tropical island tourism drives demand for asphalt pavement.
- Offshore asphalt projects face high transport costs and performance issues due to heat and heavy loads.
- Marine shell waste offers a potential solution due to its calcium carbonate content and porous structure.
Purpose of the Study:
- To investigate the use of mixed shell powder as a modifier for asphalt.
- To evaluate the impact of shell powder on the performance of base asphalt and SBS-modified asphalt.
- To determine optimal shell powder content for asphalt modification and mixture design.
Main Methods:
- Basic performance tests and high-temperature rheological tests were conducted on modified asphalt.
- Asphalt mixtures were prepared replacing limestone powder with shell powder.
- Microscopic tests were used to analyze the modification mechanism.
Main Results:
- Recommended content of mixed shell powder in SBS-modified asphalt is 9%.
- 50-100% of mineral filler can be replaced by mixed shell powder in base and SBS-modified asphalt mixtures.
- Shell powder effectively modifies asphalt properties and enhances road performance.
Conclusions:
- Mixed shell powder is a viable modifier for asphalt, improving pavement performance.
- Utilizing shell waste provides technical support for sustainable construction in offshore areas.
- This approach offers a cost-effective solution for asphalt pavement engineering in island environments.
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