Degradation-Related Changes in Ballast Gradation and Aggregate Particle Morphology

Qian, Yu; Boler, Huseyin; Moaveni, Maziar; Tutumluer, Erol; Hashash, Youssef M. A.; Ghaboussi, Jamshid

doi:10.1061/(asce)gt.1943-5606.0001706

Cited by 51 publications

(21 citation statements)

References 9 publications

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“…These studies focused on the correlation between the LAA loss and mechanical properties. LAA tests can also be used to obtain deteriorated ballast, confirmed in [16,22,23,44]. With this method, the deteriorated ballast particles are produced.…”

Section: Laa Testmentioning

confidence: 99%

“…However, most of research studies focused on quantifying ballast shape properties. A limited number of studies were performed on investigating the changing of the shape properties with 2-D images analysis [23]. To date, no studies has yet reported to use 3-D images for analyzing the shape property changing of individual ballast particles.…”

Section: Figure 9 Shape Properties Of Ballast Particlementioning

confidence: 99%

“…During the test the material samples and a set of steel spheres are tumbled inside a closed, hollow, steel cylinder ( Figure 2), which is rotated around a horizontal axis. The LAA test is an effective and simple way to obtain deteriorated ballast and the fouling, and for this purpose it was used in [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Ballast degradation: Effect of particle size and shape using Los Angeles Abrasion test and image analysis

Guo

Markine

Song

et al. 2018

Construction and Building Materials

110

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Ballast track is the most widely used track for the railway transport, and ballast bed plays a significant role to provide resistances during train operation. Generally, the ballast bed consists of crushed stones. To achieve the mitigation of ballast degradation, the first priority is to describe the degradation development and to study its effect factors. The influence of ballast morphology (particle size and shape) on ballast degradation is examined here using the Los Angeles Abrasion (LAA 1) test in combination with 3-D image analysis. LAA tests are used to obtain the deteriorated ballast. Then, based on the 3-D images, the changes of ballast particles after the tests were analysed. To quantify the ballast degradation (abrasion and breakage), the Abrasion Depth based on the analysis of 3-D images were proposed, while ballast breakage was estimated using the broken particles ratio. The results have shown that ballast degradation is directly related to the ballast morphology. The proposed image-based procedure can effectively be applied to assess ballast degradation. The results can be used for ballast material standardization, modelling of ballast degradation process and maintenance cycle prediction.

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Section: Laa Testmentioning

confidence: 99%

Section: Figure 9 Shape Properties Of Ballast Particlementioning

confidence: 99%

See 1 more Smart Citation

Ballast degradation: Effect of particle size and shape using Los Angeles Abrasion test and image analysis

Guo

Markine

Song

et al. 2018

Construction and Building Materials

110

View full text Add to dashboard Cite

show abstract

“…Because of higher accuracy, the image analysis method was chosen in this study to evaluate ballast degradation, and the ability to evaluate degradation has been verified in plenty of studies [23,30,31]. Ballast degradation is evaluated by quantifying the changes of the particle morphology.…”

Section: Image Analysis Methodsmentioning

confidence: 99%

“…Regarding the methods to generate deteriorated ballast, several laboratory tests can be utilised, such as micro-Deval abrasion test, ballast box test, as well as LAA test [23]. The LAA test is chosen in this study because it can rapidly deteriorate ballast particles and have advantages over the other two.…”

Section: Laa Testmentioning

confidence: 99%

Effects of crumb rubber size and percentage on degradation reduction of railway ballast

Guo

Markine

Qiang

et al. 2019

Construction and Building Materials

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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.

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Appraisal of Railway Ballast Degradation Through Los Angeles Abrasion, Cyclic Loading Tests, and Image Technics

Nie

Mohammed

Chen

et al. 2021

Advances in Geotechnical Engineering &Amp; Geoenvironmental Engineering

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Degradation-Related Changes in Ballast Gradation and Aggregate Particle Morphology

Cited by 51 publications

References 9 publications

Ballast degradation: Effect of particle size and shape using Los Angeles Abrasion test and image analysis

Ballast degradation: Effect of particle size and shape using Los Angeles Abrasion test and image analysis

Effects of crumb rubber size and percentage on degradation reduction of railway ballast

Appraisal of Railway Ballast Degradation Through Los Angeles Abrasion, Cyclic Loading Tests, and Image Technics

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