Next Article in Journal
Nature Inspired Plasmonic Structures: Influence of Structural Characteristics on Sensing Capability
Previous Article in Journal
Optimization of Two-Level Disassembly/Remanufacturing/Assembly System with an Integrated Maintenance Strategy
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Appl. Sci. 2018, 8(5), 667; https://doi.org/10.3390/app8050667

Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

1
School of Transportation, Southeast University, Nanjing 211189, China
2
China Railway Corporation, Beijing 100844, China
3
Railway Engineering Research Institute, China Academy of Rails Science, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Received: 13 March 2018 / Revised: 13 April 2018 / Accepted: 23 April 2018 / Published: 26 April 2018
(This article belongs to the Section Materials)
Full-Text   |   PDF [6244 KB, uploaded 3 May 2018]   |  

Abstract

Freeze-thaw damage is a typical distress incurred in road and railway engineering in cold regions. Concrete waterproofing layer is commonly used in high-speed railway tracks to prevent the penetration of surface water, however, it cracks easily under thermal stress, especially in cold regions. Recently solutions have been proposed to increase the waterproofing layer’s cracking resistance by using asphalt layers. Nonetheless, the use of emulsified asphalt as well as dense-graded asphalt mixture were not effective enough. To improve the effectiveness, in this study, mastic asphalt was designed for application as the waterproofing layer on the subgrade surface of high-speed railway tracks in cold regions. The overall performance of mastic asphalt was preliminarily evaluated by laboratory tests, then a 200-m test section was constructed for field validation in northeastern China as part of a new high-speed railway line, and water content sensors were placed inside the subgrade to monitor the performance of the mastic asphalt waterproofing layer (MAWL). The subsequent field investigation and monitoring data during the two years operation showed that MAWL dramatically outperformed the conventional concrete waterproofing layer in terms of waterproof performance. Plenty of serious cracks were found in the conventional concrete waterproofing layer, but only a limited number of local cracks were observed in MAWL. As a result, MAWL keeps the water content of subgrade at a stable level. In addition, MAWL showed relatively high stability during the two years investigation period, and no obvious deterioration was observed in the test section. View Full-Text
Keywords: high-speed railway; cold region; waterproofing layer; mastic asphalt high-speed railway; cold region; waterproofing layer; mastic asphalt
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Liu, S.; Yang, J.; Chen, X.; Yang, G.; Cai, D. Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions. Appl. Sci. 2018, 8, 667.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top