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Performance and Lifecycle of Hot Asphalt Mix Modified with Low-Percentage Polystyrene and Polybutadiene Compounds.
- Source :
- Buildings (2075-5309); Feb2024, Vol. 14 Issue 2, p389, 19p
- Publication Year :
- 2024
-
Abstract
- The paper investigates the improvement of bitumen mixture fatigue resistance and the rutting performance by using a specific low percentage of a styrene–butadiene–styrene (SBS) polymer, which contains polystyrene and polybutadiene compounds. A Fourier transform infrared (IR-FT) spectroscopy of the SBS polymer used in following test was carried out to ascertain the polybutadiene and polystyrene compound ratio, which may affect the modificant properties. Unmodified, low-percentage modified SBS, and common polymer-modified bitumen (PMB) as a reference were tested to ascertain the properties, fatigue resistance, and the rutting performance. The test results of the low-percentage modification with SBS are compared against unmodified mixtures and standard PMB mixtures. Finally, a simulation of the practical application was performed using the HDM-4 software (version 2.0), where the material research findings, with an emphasis on the rutting performance, were translated into the pavement performance with a varying binder course layer under simulated traffic conditions. Lifecycle analysis, with a focus on emissions production (CO<subscript>2</subscript>, SO<subscript>2</subscript>, and NO<subscript>x</subscript>) during pavement operation, was conducted for pavements with unmodified, low-percentage modified SBS, and standard PMB binder courses. The lifecycle analysis showed that a 3% modification of the binder course with the SBS polymer can extend the rutting parameter pavement lifecycle by approximately 34.5%, which is about half of the extension provided by the standard PMB modification. The resulting improvement in the pavement serviceability translated to a 9% reduction in CO<subscript>2</subscript> and SO<subscript>2</subscript> emissions and a 7.2% reduction in NO<subscript>x</subscript> emissions over a 20-year period. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20755309
- Volume :
- 14
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Buildings (2075-5309)
- Publication Type :
- Academic Journal
- Accession number :
- 175652753
- Full Text :
- https://doi.org/10.3390/buildings14020389