Gradation Determination of Impermeable Asphalt Mix on Subgrade Surface Layer for Ballastless Track in High-Speed Railway Lines
Based on the general review of the grading characteristics for traditional asphalt mix, this paper summarizes a relevant test on nine groups of asphalt mix, including three nominal maximum sizes (4.75mm, 9.5mm and 13.2mm) and three design grading types (close to the upper, median and lower limit of the grading range recommended by specification). The test results indicate that there is no direct relationship between aggregate nominal maximum size and permeability, while the gradation plays a decisive role. Also, as for surface impermeable asphalt mix, SAMI-10 is the most suitable grading type for anti-water in the subgrade surface layer of ballastless track in high-speed railway lines. Finally, the grading limit of SMAI-10 following the current highway specification is recommended.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784411841
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Supplemental Notes:
- Copyright © 2011 ASCE
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Fang, Mingjing
- Qiu, Yanjun
- Ai, Changfa
- Wei, Yongxing
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Conference:
- Third International Conference on Transportation Engineering (ICTE)
- Location: Chengdu , China
- Date: 2011-7-23 to 2011-7-25
- Publication Date: 2011
Language
- English
Media Info
- Media Type: Digital/other
- Features: References;
- Pagination: pp 1926-1931
- Monograph Title: ICTE 2011
Subject/Index Terms
- TRT Terms: Aggregate gradation; Asphalt mixtures; Ballastless track; High speed rail; Permeability; Subgrade (Pavements)
- Subject Areas: Design; Highways; Materials; Railroads; I22: Design of Pavements, Railways and Guideways; I30: Materials;
Filing Info
- Accession Number: 01446111
- Record Type: Publication
- ISBN: 9780784411841
- Files: TRIS, ASCE
- Created Date: Sep 14 2012 11:15AM