Asphalt Concrete for High-Speed Railway Infrastructure and Performance Comparisons
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 5
Abstract
This paper presents the results of a laboratory investigation on the performances and mixture combination parameters of railway asphalt concrete (RAC) for supporting high-speed railway slab track. To apply the RAC effectively to high-speed railway infrastructures, modified highway asphalt pavement material tests are conducted to verify mixture parameters. A suitable gradation is recommended based on the test results. The air voids of the material RAC-25 used for railway infrastructure should be controlled from 1 to 3%. The results presented in the paper demonstrate that asphalt content can be determined based on modified mixture parameters. To verify the performance and analyze the mechanistic response of RAC infrastructure, full-scale laboratory dynamic models are established under different environmental temperatures and loading levels. Based on model testing, the reinforced RAC foundation with a 12 cm deep graded gravel layer replaced by RAC-25 shows much better performance compared with the traditional design.
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Acknowledgments
Funding for this research was supported by the National Natural Science Foundation of China (Grant 51308477) and the China Railway Foundation (2014G001-G). The authors gratefully acknowledge the support.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 5 • May 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Apr 14, 2015
Accepted: Oct 5, 2015
Published online: Dec 30, 2015
Published in print: May 1, 2016
Discussion open until: May 30, 2016
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