Performance of rubber-modified asphalt for ultra-thin overlay
In order to investigate the applicability of rubber-modified asphalt in ultra-thin overlay and to clarify the differences in road performance of different rubber- modified asphalts, the evaluation of the temperature sensitivity, and high- and low-temperature of asphalt binders and road performance...
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| Format: | Article |
| Language: | Chinese |
| Published: |
Editorial Office of China Synthetic Rubber Industry
2025-06-01
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| Series: | Hecheng xiangjiao gongye |
| Subjects: | |
| Online Access: | http://hcxjgy.paperopen.com/oa/DArticle.aspx?type=view&id=202503006 |
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| Summary: | In order to investigate the applicability of rubber-modified asphalt in ultra-thin overlay and to clarify the differences in road performance of different rubber- modified asphalts, the evaluation of the temperature sensitivity, and high- and low-temperature of asphalt binders and road performance of asphalt mixtures were carried out based on ordinary rubber powder asphalt, styrene-butadiene-styrene block copolymer/rubber powder co-modified asphalt, and high-viscosity and high-elasticity rubber-modified asphalt, and at the same time, the performance change law of high-viscosity and high-elasticity rubber-modified asphalt with different amounts of modifiers were compared. The results indicated that within the same temperature variation range, the tempe-rature adaptability and resistance of high-viscosity and high-elasticity rubber-modified asphalt was relatively optimal, which could better ensure the stability of the structure and materials, and as a binder, it was less prone to damage when applied to ultra-thin overlay. The addition of high-viscosity modifier could enhance the ability of rubber-modified asphalt binder to resist high-temperature deformation and dissipate low-temperature stress, while reducing the possibility of deformation and cracking of asphalt pavement. The addition mass fraction of high-visco-sity modifier should not be less than 4%. The road performance of asphalt mixture prepared with high-viscosity and high-elasticity rubber-modified asphalt was significantly better, and its various performance indicators were all far higher than the specification requirements.
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| ISSN: | 1000-1255 |