{"title":"Laboratory study on degradation of ballast mixed with crumb rubber under impact loads","authors":"Fuguang Zhang, Jianmei Chang, H. Feng","doi":"10.1080/23248378.2022.2108151","DOIUrl":null,"url":null,"abstract":"ABSTRACT This paper evaluates the effect of crumb rubber (CR) on degradation reduction of ballast aggregates subjected to impact loads. A drop-weight impact testing apparatus was developed to test ballast mixed with CR. The probability of corner breakage and bulk fracture was investigated, and the material loss and change in sphericity were identified. The results show that, as CR percentage increases, the corner breakage probability increases first and then decreases, while the bulk fracture probability decreases. The effect of CR on the former is less than that on the latter. The degradation probability of the particles in the size range of 35.5 ~ 45 mm or that of non-cubic shapes is most influenced by CR. The material loss and change in sphericity decrease with increasing CR percentage, and the effect of CR is greatest for the particles in the size range of 25 ~ 35.5 mm and independent of particle shape.","PeriodicalId":48510,"journal":{"name":"International Journal of Rail Transportation","volume":"11 1","pages":"767 - 789"},"PeriodicalIF":3.4000,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Rail Transportation","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/23248378.2022.2108151","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"TRANSPORTATION SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 4
Abstract
ABSTRACT This paper evaluates the effect of crumb rubber (CR) on degradation reduction of ballast aggregates subjected to impact loads. A drop-weight impact testing apparatus was developed to test ballast mixed with CR. The probability of corner breakage and bulk fracture was investigated, and the material loss and change in sphericity were identified. The results show that, as CR percentage increases, the corner breakage probability increases first and then decreases, while the bulk fracture probability decreases. The effect of CR on the former is less than that on the latter. The degradation probability of the particles in the size range of 35.5 ~ 45 mm or that of non-cubic shapes is most influenced by CR. The material loss and change in sphericity decrease with increasing CR percentage, and the effect of CR is greatest for the particles in the size range of 25 ~ 35.5 mm and independent of particle shape.
期刊介绍：
The unprecedented modernization and expansion of rail transportation system will require substantial new efforts in scientific research for field-deployable technologies. The International Journal of Rail Transportation (IJRT) aims to provide an open forum for scientists, researchers, and engineers in the world to promote the exchange of the latest scientific and technological innovations in rail transportation; and to advance the state-of-the-art engineering and practices for various types of rail based transportation systems. IJRT covers all main areas of rail vehicle, infrastructure, traction power, operation, communication, and environment. The journal publishes original, significant articles on topics in dynamics and mechanics of rail vehicle, track, and bridge system; planning and design, construction, operation, inspection, and maintenance of rail infrastructure; train operation, control, scheduling and management; rail electrification; signalling and communication; and environmental impacts such as vibration and noise. The editorial policy of the new journal will abide by the highest level of standards in research rigor, ethics, and academic freedom. All published articles in IJRT have undergone rigorous peer review, based on initial editor screening and anonymous refereeing by independent experts. There are no page charges and colour figures are included in the online edition free of charge.
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