Funding for this research was provided by:
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)
the Open Fund of Key Laboratory of Road Structure and Material of Ministry of Transport (kfj170301)
Article History
Received: 6 December 2020
Accepted: 23 March 2021
First Online: 7 April 2021
Declarations
:
: The authors declare that they have no competing interests.