| Issue |
E3S Web Conf.
Volume 293, 2021
2021 3rd Global Conference on Ecological Environment and Civil Engineering (GCEECE 2021)
|
|
|---|---|---|
| Article Number | 02055 | |
| Number of page(s) | 5 | |
| Section | Environmental Energy and Civil Engineering and Water Conservancy Construction | |
| DOI | https://doi.org/10.1051/e3sconf/202129302055 | |
| Published online | 23 July 2021 | |
Study on water stability of asphalt binder with medium weathered igneous rock
1 China Road and Bridge Co., Beijing 100011, China
2 China Academy of Building Research, Beijing 100013, China
3 National Engineering Research Center of Building Technology, Beijing 100013, China
4 State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China
* Corresponding author: taoyh@crbc.com
Aiming at the problems of weak acidity of medium weathered igneous rock around Nairobi, Kenya, poor adhesion with asphalt and poor water stability of asphalt binder, the article studied the use of anti-stripping agent, cement, hydrated Lime and other technical measures to improve the water stability of asphalt binder with medium weathered igneous rock. The results showed that the 48h Marshall residual stability of the benchmark asphalt binder without any measures was 78.5%, which did not meet the standard requirements. The Marshall residual stability of medium weathered igneous rock can be significantly improved by adding anti stripping agent, cement and hydrated Lime. After freeze-thaw cycles, the splitting tensile strength of the asphalt binder with medium weathered igneous rock decreased obviously, and the TSR values of the asphalt binder with anti-spalling measures from small to large were K-4, K-3, K-2, K-6 and K-5. The water stability of the medium weathered igneous rock asphalt binder mixed with anti-stripping agent alone had relatively poor durability, and the medium weathered igneous rock asphalt binder mixed with cement and anti-stripping agent had the strongest ability to resist deformation when immersed in water.
© The Authors, published by EDP Sciences, 2021
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