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Design and Microwave Absorption Performance Study of SiC-Fe3O4 Emulsified Asphalt Mixture
Xiangyu Jiang1, Wen Xu1, Yixing Chen1
1School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China.
Materials (Basel, Switzerland)
|August 29, 2024
Summary
This study enhances cold-laid asphalt mixtures using SiC-Fe3O4 composite material (SF) for faster microwave curing and improved absorption. Optimal results were achieved with 4% SF at a 1:1 SiC to Fe3O4 ratio.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Cold-laid asphalt mixtures face challenges with slow curing and poor microwave absorption.
- Enhancing these properties is crucial for efficient paving and infrastructure development.
Purpose of the Study:
- To improve microwave absorption and accelerate curing in emulsified asphalt mixtures.
- To investigate the effect of SiC-Fe3O4 composite material (SF) on asphalt mixture properties and performance.
Main Methods:
- Designed mineral aggregate gradation based on maximum density curve theory.
- Determined optimal emulsified asphalt mixture ratios using various performance tests.
- Analyzed SF content influence on mixing and consistency.
- Evaluated microwave absorption via controlled heating tests.
Main Results:
- Mixing performance met specifications with SF content from 0% to 4%.
- SF dosage, SF composite ratio, and microwave power significantly affected microwave absorption.
- Environmental temperature had a minor impact on microwave absorption.
Conclusions:
- Optimal mix ratio: mineral aggregate:modified emulsified asphalt:water:cement = 100:12.8:6:1.
- Ideal SF dosage is 4% with a 1:1 SiC to Fe3O4 ratio.
- Optimal microwave power range is 600-1000 W for enhanced performance.
