Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes
1
School of Materials Science and Engineering, Chang’an University, Xi’an 710061, Shaanxi, China
2
Engineering Research Center of Transportation Materials, Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China
3
School of Civil and Architectural Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, Henan, China
4
Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou 450052, Henan, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(11), 2136; https://doi.org/10.3390/ma11112136
Received: 7 October 2018 / Revised: 25 October 2018 / Accepted: 26 October 2018 / Published: 30 October 2018
(This article belongs to the Special Issue Environment-Friendly Construction Materials)
Temperature sensitivity characteristics of bitumen can be evidently influenced by modifier types and natural aging processes. Many types of modifiers have been used to improve the temperature sensitivity performance of bitumen, but their effects are different. Therefore, different bitumen specimens as well as SBS/CRP (Styrene-butadiene-styrene polymer/crumb rubber powder)-modified bitumen were prepared and the temperature sensitivity characteristics of bitumen after different aging processes were analyzed in this study. A dynamic rheological property test and performance test at low temperature were carried out to analyze temperature sensitivity and low temperature rheological properties of bitumen. An infrared spectrum test was adopted to study the effect of functional groups under different aging process on the properties of bitumen. The relationship between macroscopic properties and microstructures of bitumen was analyzed. The results show that SBS/CRP-modified bitumen has a strong anti-aging ability in that its flexibility and structure remain in a good condition after long-term aging. The aging process has no significant effect on SBS/CRP-modified bitumen. SBS/CRP-modified bitumen has an excellent low-temperature relaxation ability and low-temperature crack resistance. In contrast to original bitumen and SBS-modified bitumen, the temperature sensitivity performance of SBS/CRP-modified bitumen is evidently enhanced. The physical blending effect is dominant in the bitumen modified process and there is no evident chemical reaction between bitumen and crumb rubber powder. SBS/CRP-modified bitumen is recommended for wide use in plateau areas with ultraviolet and cold surroundings.
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Keywords:
crumb rubber powder; SBS/CRP-modified bitumen; aging processes; temperature sensitivity characteristics
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MDPI and ACS Style
He, R.; Wu, S.; Wang, X.; Wang, Z.; Chen, H. Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes. Materials 2018, 11, 2136. https://doi.org/10.3390/ma11112136
AMA Style
He R, Wu S, Wang X, Wang Z, Chen H. Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes. Materials. 2018; 11(11):2136. https://doi.org/10.3390/ma11112136
Chicago/Turabian StyleHe, Rui; Wu, Shuhua; Wang, Xiaofeng; Wang, Zhenjun; Chen, Huaxin. 2018. "Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes" Materials 11, no. 11: 2136. https://doi.org/10.3390/ma11112136
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