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High and Low-Temperature Performance Evaluation and Microanalysis of SMCSBS Compound-Modified Asphalt
1School of Civil Engineering, Northeast Forestry University, Harbin 150040, China.
Materials (Basel, Switzerland)
|February 10, 2021
Summary
Styreneic methyl copolymers (SMCs) improve asphalt performance by enhancing viscosity and low-temperature properties. Optimal high-temperature performance is achieved with 12% SMC content in compound-modified asphalt (SMCSBS).
Area of Science:
- Materials Science
- Civil Engineering
- Polymer Chemistry
Background:
- Modified asphalt enhances road performance but requires optimized formulations.
- Styrene-butadiene styrene (SBS) block copolymer is a common asphalt modifier.
- Styreneic methyl copolymers (SMCs) offer potential for further asphalt modification.
Purpose of the Study:
- To investigate the properties of compound-modified asphalt using SMC and SBS.
- To evaluate the effect of varying SMC content on asphalt performance.
- To elucidate the modification mechanism of SMC in SBS-modified asphalt.
Main Methods:
- Brookfield rotary viscosity test for viscosity and temperature properties.
- Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) for performance testing.
- Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) for microstructural and physicochemical analysis.
Main Results:
- SMC addition improved asphalt viscosity, enhancing workability.
- Optimal high-temperature performance was observed at 12% SMC content.
- SMCSBS exhibited superior low-temperature performance compared to SBS-modified asphalt.
Conclusions:
- SMC acts as a surfactant, reducing viscosity and construction temperature.
- SMC uniformly disperses in SBS-modified asphalt, improving road performance.
- The compound modification of asphalt with SMC and SBS offers significant performance benefits.
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