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Open AccessArticle

Study on Low-Temperature Cracking Performance of Asphalt under Heat and Light Together Conditions

1
School of Civil and Environmental Engineering, Hunan University of Science and Engineering, Yongzhou 425199, China
2
Inner Mongolia Communications Construction Engineering Quality Supervision Bureau, Hohhot 010050, China
3
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(7), 1541; https://doi.org/10.3390/ma13071541
Received: 24 February 2020 / Revised: 23 March 2020 / Accepted: 25 March 2020 / Published: 27 March 2020
(This article belongs to the Special Issue Sustainability in Construction and Building Materials)
The low-temperature cracking performance of asphalt is considered one of the main deteriorations in asphalt pavements. However, there have been few studies on the low-temperature cracking performance of asphalt under heat and light together. Hence, the ductility test, bending beam rheometer (BBR) test, and asphalt composition analysis test are combined to investigate the low-temperature cracking performance under heat and light together based on the climatic conditions of China. The styrene–butadiene–styrene block copolymer (SBS)-modified asphalt binders were prepared with different modifier types and base asphalt in this research. The results show that the low-temperature cracking resistance of asphalt reduces under heat and light together. It is obviously reduced at the early stage, and it becomes worse with the increase of the aging time, temperature, and ultraviolet (UV) intensity. The asphalt composition has a significant impact on its low-temperature cracking performance, and the SBS modifier can improve the low-temperature cracking resistance of asphalt. The rational selection of base asphalt and modifier can improve the low-temperature cracking performance of asphalt. Under heat and light together, whether base asphalt or modified asphalt, the change trends of their ductility and component content are similar. Therefore, to improve the anti-cracking ability of the asphalt pavement, it is suggested to use the ductility of asphalt aged by heat and light together for 15 days as the evaluation index of the low-temperature cracking performance of asphalt, and asphalt should be selected according to the temperature and UV intensity of the asphalt pavement use area. View Full-Text
Keywords: heat and light together; asphalt; low-temperature cracking performance; aging heat and light together; asphalt; low-temperature cracking performance; aging
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Li, L.; Guo, Z.; Ran, L.; Zhang, J. Study on Low-Temperature Cracking Performance of Asphalt under Heat and Light Together Conditions. Materials 2020, 13, 1541.

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