Evaluation of Fume Suppression, Viscosity-Retarding, and Rheological Properties of Eco-Friendly High-Viscosity Modified Asphalt
Abstract
:1. Introduction
2. Materials and Methods
2.1. Raw Materials
2.2. Preparation of the Modified Asphalt Samples
- (1)
- The base asphalt was heated to a temperature of 180~190 °C, SBS was then added and stirred for 10 min, followed by shearing for 15 min at a speed of 1000~3000 r/min. DRP was added in batches, stirred for 10 min, and sheared for 60 min at a speed of 4000~6000 r/min.
- (2)
- PPA and sulfur were added and sheared for 10 min at a speed of 4000~6000 r/min. Viscosity-retarding agents (VRAs) and antioxidants were then added and sheared for 10 min at a speed of 3000~5000 r/min. Finally, fume suppressant was added and sheared for 10 min at a speed of 4000~6000 r/min.
- (3)
- The temperature was lowered to a range of 170~180 °C, and a four-blade mixer operating at a speed of 600 r/min was used for low-speed stirring for 30 min to eliminate foaming. Subsequently, the mixture was taken out and placed in an oven at 170~180 °C for 30 min to undergo swelling and development.
- (4)
- Once the product was inspected and deemed qualified, it was certified as an eco-friendly HVMA and stored for insulation.
2.3. Experimental
2.3.1. Fluorescence Microscopy (FM) Observation
2.3.2. Indoor Fume Assessment
2.3.3. Odor-Level Evaluation
2.3.4. Viscosity Test Performed by Rotational Viscometer
2.3.5. Temperature Sweep (TS) Test
2.3.6. Shearing Rate Sweep Test
2.3.7. Multiple Stress Creep Recovery (MSCR) Analysis
2.3.8. Liner Amplitude Sweep (LAS) Test
2.3.9. Frequency Sweep (FS) Test
2.4. Evaluation Method
2.5. Test Process
3. Results and Discussion
3.1. Morphological Analysis
3.2. Fume-Suppressing Effect Evaluation
3.3. Energy-Saving Effect Evaluation
3.3.1. Rotational Viscosity Test Analysis
3.3.2. Evaluation of the Viscosity-Retarding Effect
3.4. Rheological Performance Characterization
3.4.1. Shearing Rate Sweep Test Analysis
3.4.2. Multiple Stress Creep Recovery (MSCR) Analysis
3.4.3. Analysis of Fatigue Life Prediction from LAS Test
3.4.4. Frequency Sweep Test Results
4. Conclusions and Outlook
- (1)
- According to the fume-suppressing effect and odor-level evaluation results, the fume suppression effect and odor level effect of the DRP-modified HVMA was superior to that of rubber-modified HVMA when different types of fume suppressants were added. Furthermore, the ranking in terms of fume suppression effects was: composite fume agent > activated carbon > chemical reaction fume suppressant. And the odor level of adding composite fume suppressants sharply decreased to level one, far lower than the level three of ordinary base HVMA. Ultimately, it was determined that the 1% composite fume suppressants was selected as the optimal fume suppression plan.
- (2)
- The mixing temperatures of different HVMAs were determined based on their viscosity–temperature curves. It was found that the addition of VRA could reduce the mixing temperature of HVMA to 4–10 °C. A novel method based on the integrated area of viscosity–temperature curve was proposed in this research to evaluate the viscosity-retarding effect of different VRAs. Finally, the HVMA containing with 0.6% Evotherm3G + 3% Sasobit VRAs had the optimal viscosity-retarding effect and lower mixing temperature, and was determined as the eco-friendly HVMA.
- (3)
- The morphological characteristics and rheological properties of various HVMAs were evaluated. After Sasobit/Evotherm3G was added, the network structure of the HVMA was not as apparent as that of the HVMA with a single component added, but a continuous spatial network structure still existed. The research results of ZSV, MSCR, and LAS indicated that the selected eco-friendly HVMA exhibited better high-temperature resistance compared to common HVMAs, and the fatigue life also met the performance requirements.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Strength | Grade |
---|---|
0 | No odor |
1 | Can barely feel the odor |
2 | The odor is weak but can distinguish properties |
3 | Easy to feel the odor |
4 | Strong odor |
5 | An unbearable strong odor |
Addictive | S1 | S2 | SG | SD | Retarding Viscosity Effect Presence (Yes/No) | Sv |
---|---|---|---|---|---|---|
Base | 0 | 0 | -- | -- | ||
0.5% Evotherm3G | No | -- | ||||
0.6% Evotherm3G | Yes | |||||
2% Sasobit | Yes | |||||
3% Sasobit | No | -- | ||||
2% Sasobit + 0.5% Evotherm3G | Yes | |||||
3% Sasobit + 0.6% Evotherm3G | Yes |
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Ning, W.; Sun, G.; Qiu, K.; Jiang, X.; Wang, C.; Zhao, R. Evaluation of Fume Suppression, Viscosity-Retarding, and Rheological Properties of Eco-Friendly High-Viscosity Modified Asphalt. Coatings 2023, 13, 1497. https://doi.org/10.3390/coatings13091497
Ning W, Sun G, Qiu K, Jiang X, Wang C, Zhao R. Evaluation of Fume Suppression, Viscosity-Retarding, and Rheological Properties of Eco-Friendly High-Viscosity Modified Asphalt. Coatings. 2023; 13(9):1497. https://doi.org/10.3390/coatings13091497
Chicago/Turabian StyleNing, Weidong, Guoqiang Sun, Kexin Qiu, Xulai Jiang, Chunze Wang, and Ruiqi Zhao. 2023. "Evaluation of Fume Suppression, Viscosity-Retarding, and Rheological Properties of Eco-Friendly High-Viscosity Modified Asphalt" Coatings 13, no. 9: 1497. https://doi.org/10.3390/coatings13091497
APA StyleNing, W., Sun, G., Qiu, K., Jiang, X., Wang, C., & Zhao, R. (2023). Evaluation of Fume Suppression, Viscosity-Retarding, and Rheological Properties of Eco-Friendly High-Viscosity Modified Asphalt. Coatings, 13(9), 1497. https://doi.org/10.3390/coatings13091497