Print Email Facebook Twitter Effects of crumb rubber size and percentage on degradation reduction of railway ballast Title Effects of crumb rubber size and percentage on degradation reduction of railway ballast Author Guo, Y. (TU Delft Railway Engineering) Markine, V.L. (TU Delft Railway Engineering) Qiang, Weile (Beijing Jiaotong University) Zhang, Hui (Ruihai 3D Technology Limited Company) Jing, Guoqing (Beijing Jiaotong University) Date 2019 Abstract Higher speed, more freight and frequent maintenance increase ballast degradation and reduce the ballast lifespan. To reduce ballast degradation, crumb rubber used as buffering aggregates in ballast bed is relatively unexplored and needs more studies, because using it has the advantage of reusing the waster rubber and absorbing the noises. The effects of crumb rubber (CR) size and percentage on ballast degradation reduction is studied in this paper, and the optimal CR size and percentage are proposed. Three CR size ranges are utilised, i.e., 3 ∼ 5 mm, 10 ∼ 15 mm and 20 ∼ 25 mm, and the percentages are 0, 10, 20 and 30% by weight. Three kinds of ballast material with two size ranges are utilised. The deteriorated ballast particles were generated using Los Angeles Abrasion (LAA) tests, and the ballast degradation was evaluated with the 3D image analysis. The results indicate that ballast abrasion can be alleviated by adding the CR, while the CR has few influences on the ballast breakage. When CR size is close to ballast particle size, the effects of degradation reduction are not obvious. The corner and edge loss are the main types of ballast abrasion, although different ballast materials significantly influence the abrasion type and degree. Most importantly, the image analysis method is proved to have the ability to present ballast degradation process and has great potential for further degradation-related studies. Subject Ballast degradationCrumb rubberLos Angeles abrasion testThree-dimensional image analysis To reference this document use: http://resolver.tudelft.nl/uuid:1908ac17-20e7-4602-a6fc-0629525cc3a0 DOI https://doi.org/10.1016/j.conbuildmat.2019.03.315 Embargo date 2021-04-02 ISSN 0950-0618 Source Construction and Building Materials, 212, 210-224 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 Y. Guo, V.L. Markine, Weile Qiang, Hui Zhang, Guoqing Jing Files PDF Effect_of_crumb_rubber.pdf 1.62 MB Close viewer /islandora/object/uuid:1908ac17-20e7-4602-a6fc-0629525cc3a0/datastream/OBJ/view