Funding for this research was provided by:
Open Fund of Key Laboratory of Road Structure and Material of Ministry of Transport (kfj170301)
Hunan Provincial Natural Science Foundation of China (2019JJ40295)
Changsha University of Science and Technology Postgraduate Research and Innovation Project (CX2019SS31)
Key Project of Hunan Provincial Education Department of China (17A002)
Article History
Received: 16 September 2020
Accepted: 21 November 2020
First Online: 4 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.