Roads and Bridges-Drogi i Mosty最新文献_第6页

Application and evaluation of M-EPDG for performance analysis of Polish typical flexible and rigid pavements M-EPDG在波兰典型柔性和刚性路面性能分析中的应用与评价

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-12-31 DOI: 10.7409/RABDIM.019.019

D. Ryś, P. Jaskuła, M. Jaczewski, M. Pszczoła

引用次数: 4

Impact of reclaimed asphalt pavement (RAP) on low-temperature properties of asphalt concrete 再生沥青路面对沥青混凝土低温性能的影响

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-12-31 DOI: 10.7409/RABDIM.019.020

M. Jaczewski, B. Dołżycki, J. Alenowicz, P. Jaskuła

引用次数: 2

The impact of road investment projects on the economic activity in the light of companies operating in surrounding environment 从企业在周边环境经营的角度分析道路投资项目对经济活动的影响

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-12-31 DOI: 10.7409/RABDIM.019.016

M. Świtała, Agnieszka Łukasiewicz

{"title":"The impact of road investment projects on the economic activity in the light of companies operating in surrounding environment","authors":"M. Świtała, Agnieszka Łukasiewicz","doi":"10.7409/RABDIM.019.016","DOIUrl":"https://doi.org/10.7409/RABDIM.019.016","url":null,"abstract":"The aim of this research was to determine the impact of road investment projects on the economic activity of the enterprises operating in the surrounding environment, using two road projects located in Poznan and Lublin as an example. The research material was collected applying the technique of pen-and-paper personal interviews (PAPI). Standard measures of descriptive statistics and nonparametric tests were employed in the statistical analysis. Most often only small groups of respondents indicated positive effects of the investment project. The results concerning the time of travel on the upgraded sections of the road, which showed a greater tendency to the positive rating of the investment project are the exception. Moreover, statistically significant differences in the perception of the road depending on the investment project location were observed. The research showed that the impact of the investment project on the economic activity in the surrounding environment was more visible in the case of the S19 road than the DK92 road. The investment project’s impact measured in travel time terms was found to be considerably more extensive than the one evaluated on the basis of the economic activity or the annual turnover.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"65 1","pages":"239-254"},"PeriodicalIF":0.5,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83955988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Asphalt mixtures with binders fluidized by addition of vegetable origin oil for applications as flexible anti-crack layers 加入植物油流化的结合料沥青混合料，用作柔性抗裂层

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-10-01 DOI: 10.7409/RABDIM.019.012

A. Plewa

{"title":"Asphalt mixtures with binders fluidized by addition of vegetable origin oil for applications as flexible anti-crack layers","authors":"A. Plewa","doi":"10.7409/RABDIM.019.012","DOIUrl":"https://doi.org/10.7409/RABDIM.019.012","url":null,"abstract":"The paper presents the results of research and analyses of the technical characteristics of asphalt mixtures with bituminous binders modified using SBS copolymers with the addition of bio-fluxing agents. The analysed asphalt mixtures have been subjected to water resistance ITSR tests, stiffness modulus IT-CY, and 4PB-PR tests as well as fatigue life test through 4PB-PR test. Basing on the obtained results of tests it has been stated that asphalt mixtures using elastomeric binder with the addition of bio-fluxing agents are characterized by a much greater fatigue life and water resistance in comparison to asphalt mixtures using industrially manufactured binders. Such material solutions can be effectively used as anti-crack layers preventing the propagation of reflective or fatigue cracking to the top layers of road surfaces or their strengthening. Another significant aspect of the conducted research and analyses is the fact that the addition of bio-fluxing agents allows to lower temperatures not only during production of asphalt mixtures but also during incorporation them into road surfaces, what on the other hand is very profitable.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"30 1","pages":"181-192"},"PeriodicalIF":0.5,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73227974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Assessment of the effect of concrete slab geometrical parameters on the distribution of stresses in the road pavement structure 混凝土板几何参数对路面结构应力分布影响的评价

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-10-01 DOI: 10.7409/RABDIM.019.011

A. Zbiciak, M. Graczyk, K. Józefiak, K. Brzeziński, R. Michalczyk

{"title":"Assessment of the effect of concrete slab geometrical parameters on the distribution of stresses in the road pavement structure","authors":"A. Zbiciak, M. Graczyk, K. Józefiak, K. Brzeziński, R. Michalczyk","doi":"10.7409/RABDIM.019.011","DOIUrl":"https://doi.org/10.7409/RABDIM.019.011","url":null,"abstract":"The analysis of the state of stress prevailing in a concrete overlay slab made on an existing flexible pavement structure is presented. The concrete overlay (whitetopping) was made on the using laid over a package of pavement layers of known stiffness. The effect of loads generated by the temperature gradient and vehicle wheels loads was examined. Several whitetopping variants differing in the structural geometry were analysed. The calculations were carried out using the finite element method. A change in the length of slab can lead to a reduction in pavement building costs. A greater slab length results in a smaller number of transverse joints per kilometre and consequently, in lower labour intensity and fewer dowels used. But the maximum stresses generated by thermal and service loads increase as the length of this structural component is increased. Therefore it may be necessary to increase the thickness of the slab to ensure its proper fatigue life. Using the proposed analytical method one can optimize concrete pavement rehabilitation costs. Because of the complexity of the problem an individual approach to the particular cases must be adopted in order to find an optimal solution.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"38 1","pages":"171-180"},"PeriodicalIF":0.5,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73666033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Determinations of critical gap and follow-up time at roundabouts in Jordan 约旦环形交叉路口关键间隙和随访时间的确定

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-10-01 DOI: 10.7409/RABDIM.019.015

N. Hazim, S. Bazlamit, Z. A. Salem, O. Alghazawi, I. Odeh

{"title":"Determinations of critical gap and follow-up time at roundabouts in Jordan","authors":"N. Hazim, S. Bazlamit, Z. A. Salem, O. Alghazawi, I. Odeh","doi":"10.7409/RABDIM.019.015","DOIUrl":"https://doi.org/10.7409/RABDIM.019.015","url":null,"abstract":"Critical gap and follow-up times are two important fundamental traffic parameters used in the design and operational analysis of roundabouts and un-signalized intersections. Moreover, they are used to assess capacity and level of service at minor roads. In Jordan, roundabouts are used extensively, and therefore, there is a need to conduct studies on follow-up and critical gap time. The driver behaviour in Jordan can be described as aggressive in terms of their choice of follow-up headway at roundabouts. In this study, the roundabouts were located in mountainous terrain which allowed the collection of critical gap observations for approach slopes ranging from 6% up to 8%. The critical gap and follow-up times were recorded and analyzed. This research also identified other factors affecting critical gap, lag and follow-up times such as geometry of roundabout, slope of the approach, culture and behaviour of drivers. This research also proposes a significant relationship between approach slope at roundabouts and the observed gap. This relationship may be incorporated in the estimation of capacity and level of service determination at roundabouts. The results of this study should assist highway and traffic designers in the design and the performance evaluation of roundabouts.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"22 1","pages":"227-234"},"PeriodicalIF":0.5,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86771344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Testing the concentration of trace metals in soils near roads with varied traffic intensity 不同交通强度道路附近土壤中微量金属浓度的测定

IF 0.5

Roads and Bridges-Drogi i Mosty Pub Date : 2019-06-30 DOI: 10.7409/RABDIM.019.008

M. Ćwiąkała, J. Korzeniowska, Cezary Kraszewski, L. Rafalski

{"title":"Testing the concentration of trace metals in soils near roads with varied traffic intensity","authors":"M. Ćwiąkała, J. Korzeniowska, Cezary Kraszewski, L. Rafalski","doi":"10.7409/RABDIM.019.008","DOIUrl":"https://doi.org/10.7409/RABDIM.019.008","url":null,"abstract":"Motor transport affects the state of the natural environment and results in the accumulation of trace metals in roadside soils. The trace metal concentrations in roadside soils depend mainly on the distance from the road and the traffic intensity. The aim of the investigations was to determine the range of the environmental impact of the (Cracow-Zakopane) transport route and the effect of traffic intensity on the concentrations of trace metals in the soil. Three road sections differing in their traffic intensity were selected for this purpose. The concentrations of Cr, Cu, Ni, Pb and Zn in soil samples taken from a depth of 0-30 cm at a distance of 5, 10, 50 and 100 metres from the road were spectrophotometrically determined. The metal concentrations in the surroundings of the Cracow-Myślenice road carrying heavy traffic were found to be several times higher than the ones in the soils near the Łopuszna-Dursztyn local road with low traffic intensity. The largest differences in trace metal concentrations in the soils were found for nickel (four times higher concentrations along the Cracow-Myślenice road) at all the considered distances and for copper (three times higher) at the distances of 5 and 10 metres. In comparison with the reference areas, in the vicinity of the investigated roads the concentrations of Cr, Cu, Ni, Pb and Zn in the soil were found to be elevated. The fact that the concentrations of the trace metals decrease with increasing distance from the road's edge clearly indicates the traffic-related origin of the contaminants.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"38 1","pages":"127-134"},"PeriodicalIF":0.5,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73530834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Analysis of the influence of traffic flow variability on noise level on roads 交通流变化对道路噪声水平的影响分析

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-06-30 DOI: 10.7409/RABDIM.019.009

M. Splawinska

引用次数: 0

Assessment criteria of the recycled aggregate cement bound bases 再生骨料水泥粘结基层评定标准

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-06-30 DOI: 10.7409/RABDIM.019.007

B. Krawczyk, A. Szydło, P. Mackiewicz, Dariusz Dobrucki

引用次数: 1

Design and evaluation of stone matrix asphalt using stiffer grade crumb rubber modified bitumen 采用更硬级橡胶屑改性沥青的石基沥青的设计与评价

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Roads and Bridges-Drogi i Mosty Pub Date : 2019-06-30 DOI: 10.7409/RABDIM.019.010

G. Kumar, U. Sahoo, K. R. Rao, S. Bose

引用次数: 1