Wang, Fuli
Cui, Yujun http://orcid.org/0000-0002-6688-4748
Funding for this research was provided by:
Natural Science Foundation of China (11571207)
Shandong Natural Science Foundation (ZR2018MA011)
Key Laboratory of Highway Construction and Maintenance Technology in the Loess Region of Shanxi Transportation Research Institute (NA)
Article History
Received: 24 January 2019
Accepted: 21 April 2019
First Online: 3 May 2019
Competing interests
: The authors declare that they have no competing interests.