Laboratory study on degradation of ballast mixed with crumb rubber under impact loads

IF 3.4 2区工程技术 Q2 TRANSPORTATION SCIENCE & TECHNOLOGY

International Journal of Rail Transportation Pub Date : 2022-08-03 DOI:10.1080/23248378.2022.2108151

Fuguang Zhang, Jianmei Chang, H. Feng

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.

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掺胶粉的道碴在冲击载荷作用下的降解实验研究

摘要本文评价了橡胶屑（CR）在冲击载荷作用下对道砟集料降解降低的影响。开发了一种落锤冲击试验装置来测试掺CR的道碴。研究了道碴角部断裂和整体断裂的概率，并确定了材料损失和球度变化。结果表明，随着CR率的增加，角部断裂概率先增大后减小，而体部断裂概率减小。CR对前者的影响小于对后者的影响。尺寸在35.5～45mm范围内的颗粒或非立方形状的颗粒的降解概率受CR的影响最大。随着CR百分比的增加，材料损失和球度变化减小，而尺寸在25～35.5mm范围内的粒子的CR影响最大，与颗粒形状无关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Rail Transportation TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

6.90

自引率

15.00%

发文量

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.