Investigation and evaluation of railway ballast properties variation during technological processes

Navikas, Deividas; Sivilevičius, Henrikas; Bulevičius, Matas

doi:10.1016/j.conbuildmat.2018.07.090

Cited by 8 publications

(7 citation statements)

References 31 publications

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“…The significance of hierarchically unstructured criteria or sub-criteria is identified using a two-level model (Figure 2a). In a three-level hierarchy model, which is used in multiple criteria decision-making, the goal of the study is given first, then the criteria are presented, and, finally, sub-criteria are provided [69][70][71][72][73][74][75] (see Figure 2b). In this work, the inverse (not classical) hierarchy model (see Figure 2c) was used for determining the ranks of the criteria and their weights.…”

Section: The Structure Of the Hierarchy Model The Questionnaire And T...mentioning

confidence: 99%

Identifying the Importance of Criteria for Passenger Choice of Sustainable Travel by Train Using ARTIW and IHAMCI Methods

Maskeliūnaitė

Sivilevičius

2021

Applied Sciences

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Nowadays, travelers can use different modes of transport, and they usually choose the most suitable and reliable mode available. The choice of one mode of transport as an alternative to another is subjective. It is usually built upon passenger attitude toward the advantages and disadvantages of using a particular mode. This article proposes analytical methods for and research results on passenger choices for sustainable train journeys as an alternative to traveling by bus. The rank averages of all criteria and their normalized subjective weights were calculated with reference to new linear (ARTIW-L) and nonlinear (ARTIW-N) methods of average rank transformation into weight. A correlation between sub-criteria rank averages and normalized weights is presented, based on the minimum number of passengers required to be interviewed to provide reliable results. The average ranks assigned by passengers to the evaluation sub-criteria and their global weights were used for determining and describing the most and least important key criteria by applying the inverse hierarchy for assessment of main criteria importance (IHAMCI) method. The analysis shows that the most important key criterion belonged to the sub-criteria characterizing economy, while the less important key criteria included ride comfort. The least important key criteria described safety and environmental protection, whose normalized subjective overall weights were the lowest. Rail transport authorities and companies involved in transporting passengers can make this mode of transport more attractive to people by giving priority to improving the services they provide to passengers.

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Section: The Structure Of the Hierarchy Model The Questionnaire And T...mentioning

confidence: 99%

Identifying the Importance of Criteria for Passenger Choice of Sustainable Travel by Train Using ARTIW and IHAMCI Methods

Maskeliūnaitė

Sivilevičius

2021

Applied Sciences

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“…The research by Gailienė (2012) presents the method in Lithuania for calculating superelevation in the railway curves and analyses calculation defects. Navikas et al (2018) presents investigation and evaluation of railway ballast properties variation during technological processes. In the research by Navikas et al (2016) density and water permeability of 49 produced random samples of aggregate sub-ballast mixture, which were taken from the stockpile in the plant and from the uncompacted railway layer are investigated.…”

Section: Review Articlementioning

confidence: 99%

Railways in Lithuania: From Tsarist Russia to Rail Baltica

Maskeliūnaitė

2021

Transport

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Lithuania is a transit country. It is a small but significant territory between East and West. This fact is substantiated by the history of the country railways, which started when Tsarist Russia launched the construction of the railway between Saint-Petersburg and Warsaw. There is not much research into the history of railways in Russia, also in Lithuania. Besides, not all available information is reliable due to the nihilistic attitudes towards Tsarism of that time. Only some of the railways in the former Soviet Union were written and talked about. The history of the Lithuania railway is not an exception. Different written sources provide a variety of dates for the first railway to be built in Lithuania. They mirror varied events in the history of Lithuanian railways, thus all of them must be taken into consideration. The article presents the evolution of Lithuanian railway transport from Tsarist Russia to Rail Baltica, which is the European railway project currently implemented in Lithuania. The article discusses the world’s first railways including the ones in Tsarist Russia when the history of Lithuanian railways started. The article also considers the building of the first railway in Lithuania, construction of railway stations, setting the transportation tariffs, selection of railway employees. The author of the article employs historical and online resources as well as a long-standing personal experience in railway transport. The research into Tsar Family’s diaries and historical novels makes it possible to disclose the facts that are not widely known. The author considers the future of Lithuania with reference to the construction of the European railway Rail Baltica. The article would be useful for the readers who are interested in the historical development and future of Lithuanian railways.

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“…Afterwards gradation variation is calculated and expressed by standard deviations sp of percent passing through all screens. Their values depend on means p of percent passing and the homogeneity of the material (Navikas et al, 2018). It is recommended to evaluate the variation of crushed granite according to value of the maximum percent passing through sieves.…”

Section: Evaluation Of Granite Aggregates Gradation Variation and Hommentioning

confidence: 99%

Evaluation of Gradation Variation of the Granite Aggregates Used in Asphalt Mixtures at Their Manufacturing Place

Makulavicius

Sivilevičius

2020

The 11th International Conference ENVIRONMENTAL ENGINEERING 11th ICEE SELECTED PAPERS

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Asphalt mixture gradation homogeneity is one of the key factors for proper laying and compaction during road pavement and its long-term maintenance afterwards. To achieve the good quality asphalt mixture homogeneity of aggregates used in road pavement must be kept in mind. Regarding to this, gradation variation of five different granite aggregates fractions (0/2, 2/5, 5/8, 8/11 and 11/16) from one of the largest manufacturing plants in Lithuania were determined in this paper. Total of 244 samples were taken from conveyer belt at the manufacturing place and all the data was evaluated by statistical methods providing histograms with theoretical curves of normal distribution. After that, the results were compared to each other and the requirements issued by Lithuanian road administration authority. Regression analysis was used to determine the dependence of standard deviation of percent passing and the mean percent passing through the sieves. The obtained research findings revealed that the maximum value of standard deviation of this dependence was equal to mean of 50% percent passing. Further investigations should include other aggregates quality parameters variation and its homogeneity throughout different stages of technological and transportation processes.

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Investigation and evaluation of railway ballast properties variation during technological processes

Cited by 8 publications

References 31 publications

Identifying the Importance of Criteria for Passenger Choice of Sustainable Travel by Train Using ARTIW and IHAMCI Methods

Identifying the Importance of Criteria for Passenger Choice of Sustainable Travel by Train Using ARTIW and IHAMCI Methods

Railways in Lithuania: From Tsarist Russia to Rail Baltica

Evaluation of Gradation Variation of the Granite Aggregates Used in Asphalt Mixtures at Their Manufacturing Place

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