Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Materials
2.1.1. Asphalt
2.1.2. Snowmelt Salt
2.1.3. Asphalt Sample Preparation
- Step 1:
- Step 2:
- Step 3:
2.2. Experimental Methods
2.2.1. High-Temperature Performance by Softening Point and Viscosity Tests
2.2.2. Low-Temperature Performance by Ductility and Equivalent Brittle Point Tests
2.2.3. Temperature Sensitivity by Penetration Index
2.2.4. Asphalt–Aggregate Adhesion Property Test
2.2.5. Fourier Transform Infrared Spectroscopy Test
3. Results and Discussion
3.1. High-Temperature Performance
3.1.1. Softening Point
3.1.2. Viscosity
3.2. Low-Temperature Performance
3.2.1. Ductility
3.2.2. Equivalent Brittle Point
3.3. Temperature Sensitivity
3.4. Asphalt–Aggregate Adhesion Property
3.5. Fourier Transform Infrared Spectroscopy Test
4. Conclusions
- The linear variation relationships of the softening point, equivalent softening point and viscosity with chloride salt concentrations showed that the high-temperature performance of asphalt would be improved by chloride snowmelt salt.
- According to the ductility and equivalent brittle point, with the increase in the chloride salt solution concentration (i.e., the chloride ions increase), the low-temperature performance of asphalt becomes worse, and the chloride salt solution concentration should be recommended as less than 12~18%.
- The temperature sensitivity of asphalt presents an increasing linear relationship with the increase in the chloride salt solution concentration, and the temperature sensitivity increases by soaking in chloride salt solution concentration.
- After the effect of the chloride salt solution, the asphalt–aggregate adhesion property decreases with the increase in the chloride salt solution concentration. It is necessary to control the amount of chloride snowmelt salt in the actual snow removal projects.
- Based on Fourier transform infrared spectroscopy, the main reason for the performances of asphalt caused by chloride salt might be attributed to the change of asphalt components. With the increase in the chloride salt solution concentration, the proportion of light components (saturated fraction, aromatic fraction) in asphalt decreases, and the proportion of heavy components (resin and asphaltene) with good thermal stability increases.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Test Items | Units | Index | Standards | Requirements |
---|---|---|---|---|
Penetration @ 25 °C | 0.1 mm | 76 | T0604 | 60~80 |
Penetration index (PI) | - | −1.78 | T0604 | −1.8~+1.0 |
Ductility @ 10 °C | cm | 25.3 | T0605 | ≥20 |
Ductility @ 15 °C | cm | >100 | T0605 | ≥100 |
Softening point (R and B) | °C | 46.6 | T0606 | ≥43 |
Brookfield viscosity @ 135 °C | Pa∙s | 0.529 | T0625 | - |
Brookfield viscosity @ 60 °C | Pa∙s | 0.794 | T0625 | - |
Group No. | 0 (Dry) | 1 (0%) | 2 (6%) | 3 (12%) | 4 (18%) | 5 (24%) |
---|---|---|---|---|---|---|
K | 0.05302 | 0.05318 | 0.05268 | 0.05256 | 0.05238 | 0.05211 |
AlgP | 0.41102 | 0.39052 | 0.37755 | 0.37223 | 0.36230 | 0.34891 |
R2 | 0.997 | 0.999 | 0.999 | 0.998 | 0.999 | 0.999 |
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Zhou, P.; Wang, W.; Zhu, L.; Wang, H.; Ai, Y. Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion. Materials 2021, 14, 3089. https://doi.org/10.3390/ma14113089
Zhou P, Wang W, Zhu L, Wang H, Ai Y. Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion. Materials. 2021; 14(11):3089. https://doi.org/10.3390/ma14113089
Chicago/Turabian StyleZhou, Peilei, Wensheng Wang, Lili Zhu, Haoyun Wang, and Yongming Ai. 2021. "Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion" Materials 14, no. 11: 3089. https://doi.org/10.3390/ma14113089