Transportation Research Record: Journal of the Transportation Research Board最新文献_第4页

Predicting Ballast Fouling Conditions with the Gaussian Mixture Model 用高斯混合物模型预测压载污垢状况

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-25 DOI: 10.1177/03611981241240772

Yufeng Gong, Yu Qian

{"title":"Predicting Ballast Fouling Conditions with the Gaussian Mixture Model","authors":"Yufeng Gong, Yu Qian","doi":"10.1177/03611981241240772","DOIUrl":"https://doi.org/10.1177/03611981241240772","url":null,"abstract":"Railroad ballast is typically comprised of only large granular particles. However, the degradation of fresh ballast and the arrival of foreign fines result in ballast fouling. Compared with fresh ballast, fouled ballast exhibits reduced resilience and compromised drainage capabilities. To optimize track performance, maintenance activities for the ballast are frequently scheduled based on the fouling severity. An accurate assessment of ballast fouling conditions can enhance maintenance efficiency and reduce costs. Over the years, while many ballast fouling evaluation methods have been developed, their widespread adoption has been hindered by system costs and implementation challenges. This study aims to address this by developing an affordable and easily implemented approach to estimating ballast fouling conditions using the Gaussian Mixture Model (GMM). Initially, images of fouled ballast are characterized by fitting the distributions of each RGB (Red, Green, Blue) channel. Subsequently, two mathematical methods, expectation-maximization and point estimation, are employed to solve the GMM parameters. These derived GMM parameters are then used to backcalculate the sample parameters, facilitating the estimation of ballast fouling conditions. The results of this study reveal a close alignment between the ballast fouling conditions backcalculated with the GMM and those quantified through laboratory sieving analysis. This study thus presents a promising path forward, using images captured from cost-effective cameras to estimate ballast fouling conditions with minimal computational expense.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"42 02","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140655580","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: 0

Development of a Length-Based Cell-State Framework Toward the Re-Creation of Large-Scale Dense Congestion Patterns 开发基于长度的单元状态框架，实现大规模密集拥堵模式的重现

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-25 DOI: 10.1177/03611981241243328

Brian M. Staes, Haizhong Wang, R. Bertini

{"title":"Development of a Length-Based Cell-State Framework Toward the Re-Creation of Large-Scale Dense Congestion Patterns","authors":"Brian M. Staes, Haizhong Wang, R. Bertini","doi":"10.1177/03611981241243328","DOIUrl":"https://doi.org/10.1177/03611981241243328","url":null,"abstract":"This paper presents the results and novel findings of generating a simplified version of the prevailing traffic features that existed during a major evacuation. Leveraging the underlying framework provided by the widely used cell transmission model, the desire is to reconstruct the unique characteristics of large congestion patterns that propagate under dense traffic states, where limited attempts at scaling this base model have occurred. The length-based cell-state framework presented can reproduce large spatiotemporal congestion patterns that exist, specifically from large-scale evacuations. To further simplify, the framework considers traffic state heuristics which are calibrated through oblique cumulative count and occupancy curves. As a result of this preprocessing technique, an artifact was found from the use of the cumulative curves under the lens of Newell’s two-phase traffic flow theory where three unique, separate queued regimes were identified within the fundamental diagrams. The methodology re-created a unique large-scale congestion pattern that existed during a past regional evacuation event, Hurricane Irma, the subject of this paper. To test this methodology, a large-scale congested period was analyzed, both with probe vehicle trajectory data and stationary radar detector data. Results demonstrate that traffic re-creation into state-based contours was able to be verified near a 90% level of confidence even at large spatiotemporal extents.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"15 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140656015","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: 0

A Review of Electrically Conductive Cement Concrete Pavement for Sustainable Snow-Removal and Deicing: Road Safety in Cold Regions 用于可持续除雪和除冰的导电水泥混凝土路面综述：寒冷地区的道路安全

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-24 DOI: 10.1177/03611981231225210

M. Anis, Mohamed Abdel-Raheem

{"title":"A Review of Electrically Conductive Cement Concrete Pavement for Sustainable Snow-Removal and Deicing: Road Safety in Cold Regions","authors":"M. Anis, Mohamed Abdel-Raheem","doi":"10.1177/03611981231225210","DOIUrl":"https://doi.org/10.1177/03611981231225210","url":null,"abstract":"Within cold U.S. regions, winter storms can cause interruptions in transportation networks, affecting transportation entities’ revenue streams. Conventional snow-removal methods on roadways efficiently remove snow and ice, yet their adverse environmental impacts further make winter maintenance more challenging. In response to these concerns, electrically conductive cement concrete (ECCC) pavement has become an effective alternative for deicing and snow melting on road surfaces. ECCC utilizes the Joule heating principles to effectively melt snow and ice by incorporating conductive elements into conventional concrete. This paper comprehensively reviews the current literature on ECCC pavement. Previous studies have diligently explored various aspects of ECCC pavement, including concrete conductivity enhancement, heat transfer processes, and meticulous performance assessments, ranging from controlled laboratory scale experiments to small-scale field evaluations. The conclusions drawn from these investigations highlight the potential of ECCC pavement to considerably enhance winter road maintenance, consequently improving road safety and minimizing traffic interruptions during winter storms. The present review emphasizes ECCC pavement as a promising paradigm for effectively addressing the complexities associated with winter road maintenance in colder regions. Moreover, its environmentally friendly deicing capabilities present a sustainable departure from conventional methodologies. However, certain limitations currently impede widespread adoption of ECCC pavement, mainly concerning optimizing cost-effective construction techniques, ensuring long-lasting durability, and enhancing energy efficiency. Addressing these limitations could accelerate the broader adoption of ECCC pavement, promoting safer and more sustainable winter transportation practices.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"100 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140659218","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: 0

Are Transit-Oriented Development and Travel Characteristics Influencing Residential Dissonance? Analysis From a Developing Country’s Perspective 以公交为导向的发展和出行特征是否会影响居住失调？从发展中国家的角度进行分析

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-24 DOI: 10.1177/03611981241243325

Biswarup Das, B. R. Kadali, S. Subbarao, Jen-Jia Lin

{"title":"Are Transit-Oriented Development and Travel Characteristics Influencing Residential Dissonance? Analysis From a Developing Country’s Perspective","authors":"Biswarup Das, B. R. Kadali, S. Subbarao, Jen-Jia Lin","doi":"10.1177/03611981241243325","DOIUrl":"https://doi.org/10.1177/03611981241243325","url":null,"abstract":"The success of transit-oriented development (TOD) could hinge on reduced residential dissonance among the people living in TOD neighborhoods. Understanding the factors that could be associated with residential dissonance would be crucial in different contexts. Therefore, this study focused on exploring the various factors, such as TOD indicators, travel, and socio-demographic characteristics, that could influence the level of dissatisfaction of people living in TODs in Hyderabad, India. An ordered logit model was developed, which used data collected from primary as well as secondary sources. Results showed negative impacts of gender (male) and income on levels of dissatisfaction about neighborhoods, prompting policy interventions to address the disparities in gender and income groups. Further, it outlined the need to fulfill the varying requirements of larger households to reduce the dissonance. The roles of density, horizontal land-use diversity, and proximity to transit are very significant in improving living-satisfaction levels among people in TODs. More findings suggested the need for well-designed and maintained public spaces to address concerns related to safety and security and improve levels of satisfaction with TOD neighborhoods. The study also suggested that travel distances for educational trips, trip frequencies for work and shopping, and the use of private vehicles for work trips have positive influences on residential dissonance. It would be important to look for ways to provide convenient and sustainable alternative modes along with compact and diverse development, even though a longer commute may be acceptable.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"37 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661428","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: 0

3D Full-Waveform Tomography of Standard Penetration Test-Seismic Wavefields in Karst Florida Limestone 佛罗里达岩溶石灰岩中标准穿透测试地震波场的三维全波形层析成像技术

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241233295

Khiem T. Tran, Majid Mirzanejad, D. Horhota, Scott J. Wasman

{"title":"3D Full-Waveform Tomography of Standard Penetration Test-Seismic Wavefields in Karst Florida Limestone","authors":"Khiem T. Tran, Majid Mirzanejad, D. Horhota, Scott J. Wasman","doi":"10.1177/03611981241233295","DOIUrl":"https://doi.org/10.1177/03611981241233295","url":null,"abstract":"The shallow subsurface across large parts of Florida consists of weathered karst limestone, a spatially variable porous stratigraphy with significant influence in the design and load capacity of deep foundations. For reliable load transfer of the super structure into the bearing soil/rock, detection of voids and weak zones is crucial. This study investigated the capabilities of a recently developed standard penetration test (SPT)-seismic testing method for characterizing a large volume of soil/rock properties with a single SPT. The method utilizes a three-dimensional full-waveform inversion (3D FWI) of wavefields induced by SPT blows at depths (in-depth source) to characterize the subsurface around the SPT borehole. A site in Florida that presents shallow, surface karst limestone, was the location of a field experiment that consisted of two 36- × 18-m areas, each with an SPT at the area center. Seismic wavefields induced by SPT blows at depth were recorded by 72 vertical geophones on the ground surface and analyzed by the 3D FWI. The results revealed that subsurface soil/rock properties were characterized in submeter pixels over a large 3D domain of 24 × 36 × 18 m (depth × length × width). Multiple voids at various depths from 5 to 17 m were successfully detected at the site and confirmed by SPT data. The results suggested that the SPT-seismic method is an efficient tool for site investigation, as a bridge pier or pile group could be designed with only one SPT.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"52 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666327","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: 0

Evaluation of Effect of Structural Condition on Surface Deterioration for Flexible Pavements Using Traffic Speed Deflection Device 利用交通速度变形装置评估结构状况对柔性路面表面劣化的影响

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241242066

Xiaoyang Jia, Di Zhu

{"title":"Evaluation of Effect of Structural Condition on Surface Deterioration for Flexible Pavements Using Traffic Speed Deflection Device","authors":"Xiaoyang Jia, Di Zhu","doi":"10.1177/03611981241242066","DOIUrl":"https://doi.org/10.1177/03611981241242066","url":null,"abstract":"With the introduction of traffic speed deflection devices (TSDD), collecting network-level surface deflection data becomes more efficient and convenient. State highway agencies (SHAs) are paying more attention to the incorporation of structural information into pavement management systems to support maintenance and rehabilitation (M&R) analysis. For those SHAs who conduct M&R analysis based solely on surface condition data, it is crucial to understand how the inclusion of structural condition data may affect the performance model, which structural indices may be well-suited for their needs, and where these indices may be placed in their current flowchart of M&R analysis. To address these issues, in this study, the effects of eight structural indices obtained from TSDD on surface condition deterioration were investigated using TSDD data and surface condition data collected in Tennessee. The effects of structural indices on surface deterioration were evaluated using multiple regression, classification and regression tree analysis, and 1-year deterioration curve analysis. Surface curvature index, SCI_12, was found to be a significant factor influencing surface deteriorations. Structural indices representing condition of base layers and subgrade were less sensitive to the surface deterioration. To facilitate implementation, a flowchart of how to incorporate structural indices into M&R analysis procedure was proposed.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"2 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666489","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: 0

Evaluating the Accuracy of Probe-Based Truck Volumes using Continuous and Short-Duration Traffic Counts 利用连续和短时交通流量计数评估基于探头的卡车流量的准确性

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241242070

Cassidy Zrobek, Giuseppe Grande, Jonathan D. Regehr, Babak Mehran

{"title":"Evaluating the Accuracy of Probe-Based Truck Volumes using Continuous and Short-Duration Traffic Counts","authors":"Cassidy Zrobek, Giuseppe Grande, Jonathan D. Regehr, Babak Mehran","doi":"10.1177/03611981241242070","DOIUrl":"https://doi.org/10.1177/03611981241242070","url":null,"abstract":"The widespread nature of cell phones and connected vehicle navigation systems has led to the development of commercially available probe-based traffic data products. This study assesses the accuracy of annual average daily total traffic, truck traffic, medium-duty truck traffic, and heavy-duty truck traffic volumes obtained using probe-based traffic activity indices from a North American company called StreetLight Data (StL). The probe-based estimates were compared with 2019, 2020, and 2021 volumes at eleven continuous count sites and 2019 volumes at twenty-nine short-duration count (SDC) sites in the Winnipeg Metropolitan Region. The results showed reasonable agreement between the ground truth and probe-based total traffic estimates with mean absolute percent errors (MAPEs) ranging from 8.8% to 22.1% across the study years. The medium-duty truck estimates had larger errors than total traffic with MAPEs of 29.9% to 37.5%. Despite having higher volumes than medium-duty trucks, heavy-duty trucks had the smallest probe data sample and largest errors with MAPEs of 56.6% to 96.4%. Benefiting from its larger sample size, the StL medium-duty truck index was found to be a better predictor of heavy-duty truck traffic than the heavy-duty truck index. Further, the total truck volumes estimated using only the medium-duty index were more accurate than those taken as the sum of the medium and heavy-duty truck volumes obtained using their respective indices. Finally, the percent differences for the 2019 annual average daily total traffic and truck traffic estimates at the SDC sites were comparable when only the medium-duty index was used for truck volume estimation.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"134 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140668713","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: 0

Comprehensive Evaluation of Visual Guiding Systems for Enhancing Traffic Safety in Freeway Tunnels: An Improved Matter-Element Method with Case Study 全面评估用于加强高速公路隧道交通安全的视觉引导系统：改进的物质元素法与案例研究

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241236185

Shoushu Wang, Haoran Zheng, Zhigang Du, Lei Han, Shiming He, Fangtong Jiao

{"title":"Comprehensive Evaluation of Visual Guiding Systems for Enhancing Traffic Safety in Freeway Tunnels: An Improved Matter-Element Method with Case Study","authors":"Shoushu Wang, Haoran Zheng, Zhigang Du, Lei Han, Shiming He, Fangtong Jiao","doi":"10.1177/03611981241236185","DOIUrl":"https://doi.org/10.1177/03611981241236185","url":null,"abstract":"Provision of visual guiding facilities to improve traffic safety is in disarray. This paper proposes a comprehensive system for evaluating the effectiveness of visual guiding facilities in freeway tunnels. Aimed at addressing the current problems, this paper presents an evaluation system based on three key factors: spatial right-of-way, driving human factors, and driving performance. To evaluate the proposed system, data were collected in tunnels under varying conditions during daytime and nighttime, before and after improvement. The evaluation system categorized spatial right-of-way into lateral, longitudinal, and vertical aspects, which mainly depend on the installation of visual guiding facilities. Driving human factors were evaluated based on visual performance, and the installation method of visual facilities focused on sight distance, sight zone, and visual load. Driving performance was also evaluated by considering vehicle operational characteristics, including the maintaining of speed, distance, and lane. The results demonstrated a considerable improvement in the evaluation level of the visual guiding system, achieving Level B compared with traditional improvement schemes during both daytime and nighttime scenarios. This evaluation system could be a valuable guide for managing and designing traffic engineering in tunnels.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"136 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140668666","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: 0

Laboratory and Field Performance Evaluation of Cracking of Airfield Warm Mix Asphalt with Reclaimed Asphalt Pavement at the National Airport Pavement and Materials Research Center 国家机场路面和材料研究中心对机场温拌沥青与再生沥青路面裂缝的实验室和现场性能评估

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241242071

Dario Batioja Alvarez, Hasan Kazmee, N. Garg

{"title":"Laboratory and Field Performance Evaluation of Cracking of Airfield Warm Mix Asphalt with Reclaimed Asphalt Pavement at the National Airport Pavement and Materials Research Center","authors":"Dario Batioja Alvarez, Hasan Kazmee, N. Garg","doi":"10.1177/03611981241242071","DOIUrl":"https://doi.org/10.1177/03611981241242071","url":null,"abstract":"The U.S. Federal Aviation Administration is exploring initiatives to decrease transportation greenhouse gas emissions by developing carbon reduction strategies, including using low-embodied carbon materials, such as reclaimed asphalt pavement (RAP), in airport pavement construction. However, verifying RAP’s viability for airfield pavements with laboratory and field performance measures is essential. This study compared the cracking susceptibility of a P-401 hot mix asphalt and warm mix asphalt (WMA)+RAP airfield mixes using laboratory performance tests and conducted a preliminary evaluation of pavement responses from accelerated pavement testing (APT) fatigue tests. The observations and outcomes presented in this paper found that adding 20% of recycled materials with WMA additives had a decreasing impact in mix performance but did not overly affect the asphalt mix properties, as cracking properties from the different test procedures were found with comparable outcomes. Additional observations from strain gauges and temperature probes in the National Airport Pavement and Materials Research Center test cycle 2 APT fatigue test sections showed that the maximum tensile strains in the WMA surface lane 5 south section were consistently higher than those in the WMA+RAP lane 6 south section, which may be because of the higher load level that it was exposed. Additionally, the hardened or aged RAP binder in the entire lane 6 south section may have increased its stiffness, resulting in lower strain levels than in the lane 5 south section. Notably, both sections showed an increase in tensile strains with an increase in asphalt concrete temperature, which confirmed the temperature dependency behavior of asphalt concrete.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"130 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669241","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: 0

Multiple Stress Creep Recovery of High-Polymer Modified Binders: Consideration of Temperature and Stress Sensitivity for Quality Assurance/Quality Control Policy Development 高聚物改性粘结剂的多应力蠕变恢复：考虑温度和应力敏感性以制定质量保证/质量控制政策

Transportation Research Record: Journal of the Transportation Research Board Pub Date : 2024-04-23 DOI: 10.1177/03611981241240765

Mohamad Yaman Fares, Stefano Marini, Michele Lanotte

{"title":"Multiple Stress Creep Recovery of High-Polymer Modified Binders: Consideration of Temperature and Stress Sensitivity for Quality Assurance/Quality Control Policy Development","authors":"Mohamad Yaman Fares, Stefano Marini, Michele Lanotte","doi":"10.1177/03611981241240765","DOIUrl":"https://doi.org/10.1177/03611981241240765","url":null,"abstract":"High polymer-modified binders (HiPMBs) have recently been introduced in the Gulf region, where pavement structures are commonly subjected to severe climate conditions and heavy traffic loads because there is no enforcement of weight limits. Local agencies are currently modifying quality assurance/quality control (QA/QC) policies to accommodate such technology. In this study, HiPMBs produced by different refineries were subjected to physicochemical and thermal characterizations to investigate the compositional variability of industrial HiPMBs. Their thermal and stress susceptivity was then assessed through multiple stress creep recovery (MSCR) tests. The validation of the MSCR-based hierarchy was performed by assessing nine hot mix asphalts (HMAs) through repeated load permanent deformation tests and performing mechanistic-based structural analysis. Results showed that styrene-butadiene-styrene (SBS) is not the only modifier added to the bitumen, as commonly done in laboratory settings. These undisclosed modifiers disrupt the correlation between MSCR results and SBS concentration typically observed in laboratory-prepared HiPMBs, highlighting the importance of investigating plant-produced binders. Moreover, higher temperatures and stress levels returned different MSCR performance hierarchies among binders, questioning the effectiveness of the current MSCR test protocol for HiPMBs. Additionally, findings confirmed that the current MSCR testing protocol does not correctly assess the bitumen response in HMAs. A higher MSCR stress level shall be prescribed in the local QA/QC specifications to ensure the correct selection of HiPMBs in the region. This study can be used as a framework for other countries actively engaged in the implementation of HiPMBs and novel bituminous materials.","PeriodicalId":509035,"journal":{"name":"Transportation Research Record: Journal of the Transportation Research Board","volume":"65 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140668044","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: 0