Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt
Abstract
:1. Introduction
2. Materials and Methods
2.1. Testing Raw Materials
2.2. UV-531/SBS-Modified Asphalt Preparation
- (1)
- Put the SBS-modified asphalt into 160 °C ovens for 30 min and then take it out.
- (2)
- 0%, 0.4%, 0.7%, and 1.0% of UV-531 (external admixture) were added to SBS-modified asphalt and sheared using a high-speed shear rate of 3000 r/min and a shear temperature controlled at 165 °C to 170 °C.
- (3)
- UV-531- and SBS-modified asphalt was mixed and sheared at high speed for 40 min to prepare UV-531/SBS-modified asphalt, blended into the amount of 0% of UV-531 produced that is SBS-modified asphalt (not involving UV absorber).
2.3. Asphalt UV Aging Test Process
2.4. Tests and Methods
2.4.1. Needle Penetration
2.4.2. Softening Point
2.4.3. 5 °C Ductility
2.4.4. High-Temperature Dynamic Shear Rheology Test
2.4.5. Low-Temperature Glass Transition Temperature Test
2.4.6. Rutting Factor Ratio
2.4.7. Viscosity Aging Index
2.4.8. Infrared Spectroscopy
3. Results
3.1. Effect of UV-531 on the Conventional Performance of SBS-Modified Asphalt
3.1.1. Needle Penetration Results
3.1.2. Softening Point Results
3.1.3. 5 °C Ductility Results
3.2. Effect of UV-531 on the High and Low-Temperature Performance of SBS-Modified Asphalt before and after UV Aging
3.2.1. High-Temperature Dynamic Shear Rheology Test Results
3.2.2. Low-Temperature Glass Transition Temperature Test Results
4. Evaluation of UV-531 on the Anti-UV Aging Performance of SBS-Modified Asphalt
4.1. Evaluation of the Aging Behavior of Modified Asphalt Based on Rutting Factor Ratio
4.2. Evaluation of Asphalt Aging by Viscosity Aging Index
4.3. Analysis of the Degree of Aging Using Infrared Spectroscopy
5. Conclusions
- (1)
- The ductility at 5 °C and needle penetration of SBS-modified asphalt were improved with the increase of UV-531 addition, while the softening point was less affected. This means that the addition of UV-531 improved the low temperature properties and viscosity of SBS-modified asphalt, while the high temperature properties were less affected.
- (2)
- The DSR test revealed that UV-531 enhanced the high temperature rheological properties of SBS-modified asphalt to some degree. It was shown in the DMA test that the increase of UV-531 could reduce the glass transition temperature by a maximum of 54.74%, which led to a significant improvement in the low temperature anti-cracking properties of asphalt after ultraviolet light aging.
- (3)
- Three evaluation methods were selected to evaluate the aging. In the evaluation method based on the rutting coefficient ratio, the rutting coefficient ratio reduced as the amount of UV-531 doping increased, demonstrating that UV-531 inhibits UV aging. In the evaluation, a method based on viscosity aging index was used. As the viscosity before aging decreased with increasing dosing, the viscosity aging index also decreased, reaching a minimum at a dosing of 0.7%, indicating that UV-531 can increase the aromatic structure of asphalt. According to the analysis of the degree of aging by infrared spectra, the characteristic peaks of infrared spectra vary more obviously in the first, second and third regions, and the analysis results were that the UV aging degree of UV-531/SBS asphalt with 0.7% admixture was significantly lower than that of SBS-modified asphalt.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Indicators | Technical Requirements | Indicators | Technical Requirements |
---|---|---|---|
Density/g/cm3 | 1.068 | Boiling/°C | 457.9 |
Melting point/°C | 47~49 | Flash point/°C | 155.1 |
Test Items | SBS-Modified Asphalt | ||
---|---|---|---|
Real Test | Technical Requirements | ||
Ductility (5 °C, 5 cm/min)/cm Not less than | 28.0 | 20 | |
Softening point (Global Law)/°C Not less than | 74.2 | 60 | |
Needle penetration (25 °C, 100 g, 5 s)/0.1 mm | 53.0 | 40~60 | |
Resilient Recovery (25 °C)/% Not less than | 94.0 | 75 | |
Flash Point/°C Not less than | 300 | 230 | |
Needle penetration index PI Not less than | 0.26 | 0 | |
Kinematic viscosity (135 °C)/Pa·s No greater than | 2.55 | 3.0 | |
Solubility (trichloroethylene)/% Not less than | 99.7 | 99 | |
After RTFOT test | Quality change/% No greater than | −0.008 | ±1.0 |
Ductility (5 °C)/cm Not less than | 19.7 | 15 | |
Needle penetration ratio (25 °C)/% Not less than | 83.2 | 65 |
Modified Asphalt | Number |
---|---|
SBS-Modified Asphalt | SBS |
0.4%UV-531 + SBS-Modified Asphalt | A |
0.7%UV-531 + SBS-Modified Asphalt | B |
1.0%UV-531 + SBS-Modified Asphalt | C |
Temperature (°C) | SBS | A | B | C | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
TR | TR | TR | TR | |||||||||
70 | 1977 | 3714 | 1.87 | 1462 | 2249 | 1.53 | 1413 | 2536 | 1.79 | 1490 | 1980 | 1.32 |
76 | 1201 | 2048 | 1.71 | 910 | 1399 | 1.54 | 869 | 1245 | 1.43 | 893 | 1207 | 1.35 |
82 | 771 | 1204 | 1.56 | 598 | 905 | 1.51 | 573 | 751 | 1.31 | 604 | 783 | 1.29 |
88 | 515 | 753 | 1.46 | 412 | 607 | 1.47 | 395 | 488 | 1.23 | 428 | 525 | 1.22 |
Asphalt Type | Original ηa | Aging ηa | C |
---|---|---|---|
SBS-modified asphalt | 773.918 | 1275.485 | 0.01571 |
A | 608.138 | 910.510 | 0.01297 |
B | 596.864 | 767.58 | 0.00814 |
C | 610.044 | 822.675 | 0.00964 |
Wave Number/cm−1 | 1595.046 | 2364.603 | 3705.059 |
Feature Peak | -C=O | -C≡C | -OH group of alcohols and phenols |
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Liu, L.; Liu, L.; Liu, Z.; Yang, C.; Pan, B.; Li, W. Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt. Materials 2022, 15, 8110. https://doi.org/10.3390/ma15228110
Liu L, Liu L, Liu Z, Yang C, Pan B, Li W. Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt. Materials. 2022; 15(22):8110. https://doi.org/10.3390/ma15228110
Chicago/Turabian StyleLiu, Li, Leixin Liu, Zhaohui Liu, Chengcheng Yang, Boyang Pan, and Wenbo Li. 2022. "Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt" Materials 15, no. 22: 8110. https://doi.org/10.3390/ma15228110
APA StyleLiu, L., Liu, L., Liu, Z., Yang, C., Pan, B., & Li, W. (2022). Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt. Materials, 15(22), 8110. https://doi.org/10.3390/ma15228110