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What is known and unknown concerning microplastics from tyre wear? 关于轮胎磨损产生的微塑料,已知和未知的是什么?
IF 3.7 3区 工程技术 Q1 Engineering Pub Date : 2023-11-22 DOI: 10.1080/14680629.2023.2281956
Helena Miera-Domínguez, Pedro Lastra-González, Irune Indacoechea-Vega, Daniel Castro-Fresno
Pollution of the environment by microplastics is a problem that is increasingly visible and worrisome, with tyre wear particles (TWPs) being considered, after several studies, as one of the major s...
微塑料对环境的污染是一个日益明显和令人担忧的问题,经过几项研究,轮胎磨损颗粒(TWPs)被认为是造成环境污染的主要原因之一。
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引用次数: 0
Investigation on microstructure characteristics of crumb rubber compound modified asphalt at preparation process 橡胶屑复合改性沥青制备过程微结构特性研究
3区 工程技术 Q1 Engineering Pub Date : 2023-11-10 DOI: 10.1080/14680629.2023.2278142
Hui Wang, Jia Li, Yufeng Tang, Jingpu Zhu, Weilin Huang, Xu Wang, Juan Xie
AbstractThis study presented the investigation on the microstructure characteristics and the interaction among asphalt, crumb rubber (CR) and modifiers (softener, activator, and cross-linking agent) of crumb rubber compound modified asphalt (CRCMA) at process phases by microscopic testing techniques. The results showed that CRCMA had excellent rheological properties at high or low-temperature. The softener was only physically mixed with asphalt and did not change the microscopic morphology of the asphalt. The activator can break some of the chemical bonds of CR and promote the desulphurization degradation reaction which makes the asphalt show a large number of small-body type mesh structures and a small amount of chains in microscopic morphology. The crosslinking agent provided a source of sulphur to induce the crosslinking reaction which resulted in an increase in the reticulation of CRCMA. Finally, a modification mechanism model and the evolution mechanisms based on the microstructure characteristics at preparation phases of CRCMA were proposed.KEYWORDS: Crumb rubber compound modified asphaltmicroscopic testinterfacial microstructure characteristicsmechanism analysisevolution laws Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the National Key Research and Development Program of China [grant number 2021YFB2600900]; the Postgraduate Scientific Research Innovation Project of Changsha University of Science and Technology [grant number CX2021SS110]; the Science and Technology Planning Project of Hunan Transportation Department of China [grant number 201825,B202112,202209]; the Changsha Natural Science Foundation of China [grant number kq2202205]; the National Natural Science Foundation of China [grant number 52178411].
摘要采用显微测试技术研究了橡胶屑复合改性沥青(CRCMA)的微观结构特征,以及沥青、橡胶屑(CR)和改性剂(软化剂、活化剂和交联剂)在工艺阶段的相互作用。结果表明,CRCMA在高低温条件下均具有优异的流变性能。软化剂仅与沥青物理混合,不改变沥青的微观形态。活化剂能破坏CR的部分化学键,促进脱硫降解反应,使沥青在微观形态上呈现大量小体型网状结构和少量链。交联剂为诱导交联反应提供了硫源,导致CRCMA的网状结构增加。最后,提出了基于CRCMA制备阶段微观结构特征的改性机理模型和演化机理。关键词:橡胶颗粒改性沥青微观试验界面微观结构特征机理分析演化规律披露声明作者未发现潜在利益冲突。项目资助:国家重点研发计划项目[批准号2021YFB2600900];长沙理工大学研究生科研创新项目[批准号:CX2021SS110];湖南省交通厅科技规划项目[批准号201825,B202112,202209];长沙市自然科学基金[批准号kq2202205];国家自然科学基金[批准号52178411]。
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引用次数: 0
Field assessment of rigid pavement stabilisation using cementitious grout: case study 使用水泥灌浆的刚性路面稳定的现场评估:案例研究
3区 工程技术 Q1 Engineering Pub Date : 2023-11-07 DOI: 10.1080/14680629.2023.2278150
Lukuan Ma, Chenchen Li, Mu Guo, Zefeng Tao
AbstractOn the 2nd runway of Shanghai Pudong International Airport, the field assessment was conducted for rigid pavement stabilization using cementitious grout. The support performance of underlying layers and voids beneath slabs were considered, and the deflection testing was performed before and after grouting. The performance of pre-treatment and post-treatment pavements, and effects of injecting depth and curing time on grouting treatment were statistically analyzed. Results indicated that the support performance of underlying layers along the wheelpath was gradually getting deteriorated and non-uniform during the service period, and the number of voids beneath slabs would also increase annually. The injecting depth at 10 cm under subbase layer was proposed for rigid pavements with the crushed stone subbase layer. Besides, the performance evaluation of cementitious grouting stabilization for rigid pavement was recommended after 60-day curing. Finally, results demonstrated that the objective of pavement stabilization for the 2nd runway was successfully achieved.KEYWORDS: Cementitious groutDeflection testingSupporting performanceVoids beneath slabsInjecting depthCuring time AcknowledgementThis work was sponsored by the National Natural Science Foundation of China (ID: 52008310).Disclosure statementNo potential conflict of interest was reported by the author(s).Author contribution statementThe authors confirm contribution to the paper as follows: study conception and design: Lukuan Ma and Mu Guo; data collection: Chenchen Li and Zefeng Tao; analysis and interpretation of results: Lukuan Ma and Zefeng Tao; draft manuscript preparation: Lukuan Ma and Mu Guo. All authors reviewed the results and approved the final version of the manuscript.Additional informationFundingThis work was supported by the National Natural Science Foundation of China: [Grant Number 52008310].
摘要以上海浦东国际机场2号跑道为研究对象,进行了水泥灌浆刚性路面稳定的现场评价。考虑下垫层和板下空隙的支护性能,进行了注浆前后的挠度试验。统计分析了处理前后路面的性能,以及注浆深度和养护时间对注浆处理的影响。结果表明:在服役期间,沿轮径下垫层的支护性能逐渐恶化且不均匀,板下空穴数量也逐年增加;对于碎石下层刚性路面,建议在下层下10 cm处进行注浆。并对刚性路面养护60 d后的胶结注浆稳定化性能进行了评价。结果表明,成功实现了第二跑道的路面稳定目标。关键词:胶凝剂;挠度测试;支护性能;披露声明作者未报告潜在的利益冲突。作者对本文的贡献如下:研究概念和设计:马路宽、郭木;数据收集:李晨晨、陶泽峰;结果分析与解释:马路宽、陶泽峰;初稿准备:马路宽、郭牧。所有作者审查了结果并批准了手稿的最终版本。项目资助:国家自然科学基金资助项目[批准号52008310]。
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引用次数: 0
Review of methodology for life cycle assessment and life cycle cost analysis of asphalt pavements 沥青路面生命周期评价与生命周期成本分析方法综述
3区 工程技术 Q1 Engineering Pub Date : 2023-11-07 DOI: 10.1080/14680629.2023.2278149
Fardzanela Suwarto, Tony Parry, Gordon Airey
AbstractDifferent approaches continue to be used to evaluate the environmental and financial impacts of road pavements throughout their life cycle. This paper aims to provide a methodological review of published studies of asphalt pavement Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) and make recommendations for future studies. The results indicate that LCA studies limitations are related to functional units (FUs), chosen life cycle phases, maintenance schedules decision, and uncertainty. In comparison, the use of LCCA is limited to assessing maintenance strategies, is largely focused on agency cost, and usually ignores the possibility of current or future uncertainty. Accordingly, it is recommended to incorporate both LCA and LCCA, define a standard set of FUs, include the complete life cycle (including for new materials), consider pavement performance predictions in determining realistic maintenance schedules, include both short- and long-term costs and environmental impacts, and emphasise on probabilistic analysis of uncertainty.KEYWORDS: Economic analysisenvironmental analysislife cycle assessmentlife cycle cost analysisasphalt pavement AcknowledgementsThe authors of this paper would like to express their gratitude to Diponegoro University for the support provided during the research conducted.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe study was sponsored and fully funded by the Diponegoro University [grant number 5172/UN7.P2/KP/2020].
摘要不同的方法继续被用于评估道路路面在其整个生命周期中的环境和财务影响。本文旨在对已发表的沥青路面生命周期评估(LCA)和生命周期成本分析(LCCA)研究进行方法学回顾,并为未来的研究提出建议。结果表明,LCA研究的局限性与功能单元(FUs)、选择的生命周期阶段、维护计划决策和不确定性有关。相比之下,LCCA的使用仅限于评估维护策略,主要关注代理成本,通常忽略当前或未来不确定性的可能性。因此,建议将LCA和LCCA结合起来,定义一套标准的FUs,包括完整的生命周期(包括新材料),在确定现实的维护计划时考虑路面性能预测,包括短期和长期成本和环境影响,并强调不确定性的概率分析。关键词:经济分析、环境分析、生命周期评价、生命周期成本分析、沥青路面致谢本文作者感谢迪波涅戈罗大学在研究过程中给予的支持。披露声明作者未报告潜在的利益冲突。该研究由Diponegoro大学赞助并全额资助[资助号5172/UN7.P2/KP/2020]。
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引用次数: 0
Evaluation of drastic temperature change on temperature stress of asphalt mixture during microwave deicing 微波除冰过程中沥青混合料温度应力剧烈变化的评价
3区 工程技术 Q1 Engineering Pub Date : 2023-11-05 DOI: 10.1080/14680629.2023.2278184
Yu Zhao, Xiaoming Liu, Daxiong Yan
AbstractMicrowave deicing is an efficient and environment-friendly technology for asphalt pavement. Previous studies have shown that silicon carbide can improve the deicing efficiency of pavement, but the influence of drastic temperature change during microwave deicing on the temperature stress and temperature fatigue life is undefined. In this study, the temperature stress during heating and cooling were analysed by numerical simulation, and the mechanism of stress change was discussed. Finally, the temperature fatigue performance of pavement was evaluated. The simulation results showed that an increase in the temperature rising rate did not necessarily increase the temperature stress, and there was no stress accumulation after microwave deicing. The temperature stress was affected by both the temperature change rate and the heat transfer performance, and good heat transfer performance of asphalt mixture could reduce the temperature stress. Besides, the drastic temperature change did not necessarily reduce the temperature fatigue life of pavement.KEYWORDS: Asphalt mixture containing silicon carbide aggregatetemperature change ratetemperature stress and straintemperature fatigue lifemicrowave heating AcknowledgementsThe authors are grateful for technical support from the High Performance Computing Center of Central South University and thank Yecheng Fan from Shiyanjia Lab (www.shiyanjia.com) for the electromagnetic parameters of SiC analysis.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by National Natural Science Foundation of China: [Grant Number 52078499]; Natural Science Foundation of Hunan Province: [Grant Number 2022JJ30730]; Science and Technology Program of Hunan Province: [Grant Number No. 202246].
摘要微波除冰是一种高效、环保的沥青路面除冰技术。已有研究表明,碳化硅可以提高路面除冰效率,但微波除冰过程中温度的剧烈变化对路面温度应力和温度疲劳寿命的影响尚不明确。通过数值模拟分析了加热和冷却过程中的温度应力,并探讨了应力变化的机理。最后对路面的温度疲劳性能进行了评价。模拟结果表明,升温速率的增加并不一定会增加温度应力,微波除冰后不存在应力积累。温度应力受温度变化率和换热性能的双重影响,沥青混合料良好的换热性能可以降低温度应力。此外,剧烈的温度变化并不一定会降低路面的温度疲劳寿命。关键词:含碳化硅骨料沥青混合料温度变化率温度应力应变温度疲劳寿命微波加热感谢中南大学高性能计算中心的技术支持,感谢十砚家实验室(www.shiyanjia.com)樊业成提供的SiC电磁参数分析。披露声明作者未报告潜在的利益冲突。本研究由国家自然科学基金资助:[批准号52078499];湖南省自然科学基金项目[批准号2022JJ30730];湖南省科技计划项目[批准号202246]。
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引用次数: 0
Road performance and prediction model for carbonaceous mudstone soil-rock mixtures under wet-dry cycles 干湿循环条件下碳质泥岩土石混合体的道路性能及预测模型
3区 工程技术 Q1 Engineering Pub Date : 2023-11-05 DOI: 10.1080/14680629.2023.2278146
Qiyi Yang, Wei Wen, Ling Zeng, Hongyuan Fu, Qianfeng Gao, Lu Chen, Hanbing Bian
AbstractThe abandoned carbonaceous mudstone has caused severe environmental problems such as land occupation and landslides. For the consideration of economic and ecological factors, carbonaceous mudstone soil-rock mixture (CMSRM) is used as an embankment material assessed by California bearing ratio (CBR) and unconfined compression strength (UCS). A series of experiments were conducted to measure the CBR and UCS of the CMSRM with different wet-dry cycles (0, 2, 4, 6 and 8) and different rock contents (0, 20, 40, 60 and 80%). The experimental results were predicted and analysed by a convolutional neural network (CNN). The experiment results show that the CBR and UCS of CMSRM increased at first and then decreased with the increase of rock content and were negatively correlated with wet-dry cycles. The CNN predicted values were highly correlated with the measured values. The CNN model enables variable parameter analysis of the experiment results via deep learning, which provides a new method to the CMSRM embankment road performance prediction.KEYWORDS: Carbonaceous mudstonewet-dry cyclesCalifornia bearing ratiounconfined compressive strengthconvolution neural networkprediction model Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors gratefully acknowledge the financial support offered by the National Natural Science Foundation of China (52078066, 52004036, 42207204, 52378440), the Postgraduate Scientific Research Innovation Project of Hunan Province (CX20210738), the Changsha City Outstanding Innovative Youth Training Program (kq1905043), the Hunan young scientific and technological innovation talents (2020RC306), the Natural Science Foundation of Hunan Province Outstanding Youth Fund Project (2023JJ10045), the ‘Double First-class’ International Cooperation project of Changsha University of Science and Technology (2019IC04), the 2021 Bridge Engineering Safety Control Key Laboratory of Ministry of Education Open Fund Project (21KB12), the National Natural Science Foundation of Hunan Province Projects (2021JJ40572), the Open Fund of Key Laboratory of Bridge Engineering Safety Control by Department of Education (Changsha University of Science & Technology) (15KB01) and the Research Foundation of Education Bureau of Hunan Province Project (20B040).
摘要废弃的碳质泥岩造成了严重的土地占用、山体滑坡等环境问题。考虑到经济和生态因素,采用碳质泥岩土石混合物(CMSRM)作为路堤材料,采用加州承载比(CBR)和无侧限抗压强度(UCS)进行评价。在不同的干湿循环周期(0、2、4、6和8)和不同的含石量(0、20、40、60和80%)条件下,对CMSRM的CBR和UCS进行了测试。利用卷积神经网络(CNN)对实验结果进行预测和分析。试验结果表明,CBR和UCS随岩石含量的增加先增大后减小,且与干湿循环负相关。CNN的预测值与实测值高度相关。CNN模型通过深度学习实现了对实验结果的变参数分析,为CMSRM路堤路面性能预测提供了一种新的方法。关键词:碳质泥岩干湿旋回;加州承压比;无约束抗压强度;卷积神经网络预测模型;作者感谢国家自然科学基金项目(52078066,52004036,42207204,52378440)、湖南省研究生科研创新项目(CX20210738)、长沙市优秀创新青年培养计划(kq1905043)、湖南省青年科技创新人才项目(2020RC306)、湖南省青年科技创新人才项目(2020RC306)的资助。湖南省优秀青年自然科学基金项目(2023JJ10045),长沙理工大学“双一流”国际合作项目(2019IC04), 2021桥梁工程安全控制教育部重点实验室开放基金项目(21KB12),湖南省国家自然科学基金项目(2021JJ40572),长沙理工大学桥梁工程安全控制教育部重点实验室开放基金(15KB01)和湖南省教育局研究基金项目(20B040)。
{"title":"Road performance and prediction model for carbonaceous mudstone soil-rock mixtures under wet-dry cycles","authors":"Qiyi Yang, Wei Wen, Ling Zeng, Hongyuan Fu, Qianfeng Gao, Lu Chen, Hanbing Bian","doi":"10.1080/14680629.2023.2278146","DOIUrl":"https://doi.org/10.1080/14680629.2023.2278146","url":null,"abstract":"AbstractThe abandoned carbonaceous mudstone has caused severe environmental problems such as land occupation and landslides. For the consideration of economic and ecological factors, carbonaceous mudstone soil-rock mixture (CMSRM) is used as an embankment material assessed by California bearing ratio (CBR) and unconfined compression strength (UCS). A series of experiments were conducted to measure the CBR and UCS of the CMSRM with different wet-dry cycles (0, 2, 4, 6 and 8) and different rock contents (0, 20, 40, 60 and 80%). The experimental results were predicted and analysed by a convolutional neural network (CNN). The experiment results show that the CBR and UCS of CMSRM increased at first and then decreased with the increase of rock content and were negatively correlated with wet-dry cycles. The CNN predicted values were highly correlated with the measured values. The CNN model enables variable parameter analysis of the experiment results via deep learning, which provides a new method to the CMSRM embankment road performance prediction.KEYWORDS: Carbonaceous mudstonewet-dry cyclesCalifornia bearing ratiounconfined compressive strengthconvolution neural networkprediction model Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors gratefully acknowledge the financial support offered by the National Natural Science Foundation of China (52078066, 52004036, 42207204, 52378440), the Postgraduate Scientific Research Innovation Project of Hunan Province (CX20210738), the Changsha City Outstanding Innovative Youth Training Program (kq1905043), the Hunan young scientific and technological innovation talents (2020RC306), the Natural Science Foundation of Hunan Province Outstanding Youth Fund Project (2023JJ10045), the ‘Double First-class’ International Cooperation project of Changsha University of Science and Technology (2019IC04), the 2021 Bridge Engineering Safety Control Key Laboratory of Ministry of Education Open Fund Project (21KB12), the National Natural Science Foundation of Hunan Province Projects (2021JJ40572), the Open Fund of Key Laboratory of Bridge Engineering Safety Control by Department of Education (Changsha University of Science & Technology) (15KB01) and the Research Foundation of Education Bureau of Hunan Province Project (20B040).","PeriodicalId":21475,"journal":{"name":"Road Materials and Pavement Design","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135725544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Curing conditions effect on the stabilization of recycled asphalt pavement with alkali-activated metakaolin and rice husk ash-derived activator 固化条件对碱活化偏高岭土和稻壳灰衍生活化剂固化再生沥青路面的影响
3区 工程技术 Q1 Engineering Pub Date : 2023-11-02 DOI: 10.1080/14680629.2023.2276421
Deise Trevizan Pelissaro, Aédnor Antonio Casado Zago, Suéllen Tonatto Ferrazzo, Giovani Jordi Bruschi, Francisco Dalla Rosa
AbstractThe stabilization of recycled asphalt pavement (RAP) with alkali-activated cement (AAC) is a topic of growing interest for sustainable engineering, especially those containing alternative activators produced from waste. This study evaluated the effect of curing temperature on the stabilization of RAP with a metakaolin AAC and rice husk ash-derived activator for potential use in base and subbase layers in flexible pavement systems. Unconfined compressive strength (UCS), X-ray diffraction, and scanning electron microscopy tests were performed. Higher strength values were associated with higher temperatures and curing times. Curing oven time presented no influence over UCS and mineralogy. Blends cured at 20°C exhibited efflorescence formation and prolonged curing time at high temperatures negatively affected the mechanical performance. Curing temperature of 80°C up to 24 h promoted the formation and uniform distribution of cementing gels and a dense and compact structure, improving the compressive strength.KEYWORDS: Recycled asphalt pavementalkali-activated cementalternative alkaline activatorstrength developmentmineralogymicrostructure AcknowledgementsThe authors wish to explicit their appreciation to National Council for Scientific and Technological Development -CNPq for the support to the research group.Disclosure statementNo potential conflict of interest was reported by the author(s).Authors’ contributionsAll authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Aednor Antonio Casado Zago and Deise Trevizan Pelissaro. The first draft of the manuscript was written by Deise Trevizan Pelissaro and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. In addition, Francisco Dalla Rosa was responsible for the supervision of the research.Data availability statementSome or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
摘要碱活化水泥(AAC)稳定再生沥青路面(RAP)是可持续工程日益关注的课题,特别是那些含有从废物中产生的替代活化剂的再生沥青路面。本研究评估了固化温度对偏高岭土AAC和稻壳灰衍生活化剂在柔性路面系统基层和亚基层中的潜在应用对RAP稳定性的影响。进行无侧限抗压强度(UCS)、x射线衍射和扫描电镜测试。较高的强度值与较高的温度和固化时间有关。焙烧时间对矿物学和单束强度无明显影响。在20°C下固化的共混物表现出开花现象,高温下延长固化时间对其力学性能产生负面影响。80℃~ 24 h的养护温度促进了胶凝凝胶的形成和均匀分布,结构致密致密,提高了抗压强度。关键词:再生沥青路面碱活化水泥替代碱活化剂强度发展矿物学微观结构感谢国家科学技术发展委员会对课题组的支持。披露声明作者未报告潜在的利益冲突。作者的贡献所有作者都对研究的构思和设计做出了贡献。材料准备、数据收集和分析由Aednor Antonio Casado Zago和Deise Trevizan Pelissaro完成。手稿的初稿由Deise Trevizan Pelissaro撰写,所有作者都对之前的手稿版本进行了评论。所有作者都阅读并批准了最终的手稿。此外,弗朗西斯科·达拉·罗莎负责监督这项研究。数据可用性声明支持本研究结果的部分或全部数据、模型或代码可根据通讯作者的合理要求获得。
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引用次数: 0
Development of prediction models for interlayer shear strength in asphalt pavement using machine learning and SHAP techniques 利用机器学习和SHAP技术建立沥青路面层间抗剪强度预测模型
3区 工程技术 Q1 Engineering Pub Date : 2023-11-02 DOI: 10.1080/14680629.2023.2276412
Rabea AL-Jarazi, Ali Rahman, Changfa Ai, Zaid Al-Huda, Hamza Ariouat
AbstractThe interlayer bonding condition in asphalt pavement significantly affects pavement performance. This study employed machine learning techniques to predict interlayer shear strength (ISS). Feed-forward artificial neural networks (ANN) and random forest (RF) models were developed and compared with traditional multiple linear regression (MLR). Utilizing 156 datasets, divided into 70% training and 30% testing, model performance was assessed using R-squared, mean squared error (MSE), root mean squared error (RMSE), and mean absolute error (MAE). SHapley Additive exPlanations (SHAP) was utilized for model interpretation. The results indicated that the ANN and RF models outperformed MLR, explaining over 95% of experimental data. RF exhibited superior performance with lowest MSE, RMSE, and MAE (0.0029, 0.0538, and 0.0376 MPa). SHAP analysis highlighted the significance of temperature, normal stress, shear deformation rate, and curing time as influential variables in ISS prediction. Elevated temperature adversely influenced ISS, while normal stress, shear deformation rate, and curing time positively contributed to ISS.KEYWORDS: Asphalt pavementinterlayer shear strengthmachine learningANNrandom forest (RF)SHAP AcknowledgmentsThis work was supported by the Fundamental Research Funds for the Central Universities, SWJTU [grant number 2682022CX002], National Natural Science Foundation of China [grant number 52278462], and Sichuan Youth Science and Technology Innovation Research Team (grant number 2021JDTD0023).Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the Fundamental Research Funds for the Central Universities, SWJTU [grant number 2682022CX002], National Natural Science Foundation of China [grant number 52278462], and Sichuan Youth Science and Technology Innovation Research Team (grant number 2021JDTD0023).
摘要沥青路面层间粘结状况对路面性能影响很大。本研究采用机器学习技术预测层间抗剪强度(ISS)。建立了前馈人工神经网络(ANN)和随机森林(RF)模型,并与传统的多元线性回归(MLR)进行了比较。利用156个数据集,分为70%的训练和30%的测试,使用r平方、均方误差(MSE)、均方根误差(RMSE)和平均绝对误差(MAE)来评估模型的性能。采用SHapley加性解释(SHAP)进行模型解释。结果表明,ANN和RF模型优于MLR模型,解释了95%以上的实验数据。RF在最小的MSE、RMSE和MAE(0.0029、0.0538和0.0376 MPa)下表现出优异的性能。SHAP分析强调了温度、正应力、剪切变形速率和固化时间作为影响ISS预测的变量的重要性。温度升高对ISS有不利影响,而正应力、剪切变形速率和固化时间对ISS有积极影响。本文由中央高校基本科研业务费专项基金、西南交大[批准号2682022CX002]、国家自然科学基金[批准号52278462]和四川省青少年科技创新研究团队(批准号2021JDTD0023)资助。披露声明作者未报告潜在的利益冲突。本工作得到中央高校基本科研业务费专项资金、西南交通大学[批准号2682022CX002]、国家自然科学基金[批准号52278462]和四川省青少年科技创新研究团队(批准号2021JDTD0023)的支持。
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引用次数: 0
Study on single-direction water-blocking of waterproof membrane in silt subgrade 淤泥质路基防水膜单向阻水研究
3区 工程技术 Q1 Engineering Pub Date : 2023-11-02 DOI: 10.1080/14680629.2023.2278145
Wenliang Wan, Chunpeng Han, Botong Chen, Wei Jin, Qingjie Dong, Yushu Wang
AbstractThis paper proposes a new concept of single-direction water-blocking for waterproof membranes in silt subgrades to meet the demands of inhibiting capillary rising and allowing subgrade water downward through the waterproof membrane. Furthermore, a new approach to determine the total pore area in water-repellent soil is proposed using a contact angle test. The relationship between the water repellence of the waterproof membrane and the consumption of Sodium Methyl Silicate per unit Area (SMSA) is obtained for different levels of compactness. When SMSA consumption is less than 4 g/m2, the water repellence of the waterproof membrane is extremely poor, whereas, in the range of 4–10 g/m2, its water repellence is greatly enhanced. When the SMSA consumption is more than 10 g/m2, the water repellence becomes stable. The total pore area of the waterproof membrane decreases when the SMSA consumption is increased.KEYWORDS: Silt subgradewaterproof membranefluid potential equationwater repellencesingle-direction water-blocking Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要为满足抑制毛细上升、使路基水通过防水膜向下运移的要求,提出了淤泥质路基防水膜单向阻水的新概念。在此基础上,提出了一种利用接触角试验测定拒水性土总孔隙面积的新方法。得到了不同密实度下防水膜的防水性与单位面积甲基硅酸钠消耗量的关系。当SMSA用量小于4 g/m2时,防水膜的防水性极差,而在4 ~ 10 g/m2范围内,防水膜的防水性大大增强。当SMSA用量大于10g /m2时,防水性趋于稳定。随着SMSA用量的增加,防水膜的总孔面积减小。关键词:淤泥路基防水膜流体势方程拒水单向阻水披露声明作者未报告潜在利益冲突。
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引用次数: 1
Automatic pavement distress severity detection using deep learning 基于深度学习的路面破损程度自动检测
3区 工程技术 Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1080/14680629.2023.2276422
Parisa Setayesh Valipour, Amir Golroo, Afarin Kheirati, Mohammadsadegh Fahmani, Mohammad Javad Amani
AbstractRoads are one of the most critical infrastructures, which should be maintained at a high quality of service. For this purpose, road pavement should be assessed cost-effectively. In the past, image processing methods were used to analyze pavement conditions. In recent years, machine learning methods have been employed, while now deep learning methods are applied. Deep learning has outperformed other methods regarding the accuracy and speed of pavement distress evaluation. In this research, a deep learning algorithm called YOLOv5 is deployed to detect pavement block cracking and estimate its severity using images taken from the right of way via a road surface profiler. Two models are successfully trained and tested, one to detect block cracking and the other to predict its severity with a sufficient level of accuracy of 84.5% and 76.6%, respectively. It is concluded that the model not only can detect block cracking but also predict its severity.KEYWORDS: Pavement management systemdeep learningblock crackingobject detectionYOLOannotation Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要道路是最关键的基础设施之一,必须保持高质量的服务。为此目的,应经济有效地评估道路路面。过去,使用图像处理方法来分析路面状况。近年来采用了机器学习方法,而现在采用了深度学习方法。在路面损伤评估的准确性和速度方面,深度学习优于其他方法。在这项研究中,使用了一种名为YOLOv5的深度学习算法来检测路面块的裂缝,并通过路面剖面仪从道路右侧拍摄图像来估计其严重程度。成功地训练和测试了两个模型,一个用于检测块体开裂,另一个用于预测其严重程度,准确率分别达到84.5%和76.6%。结果表明,该模型不仅可以检测出砌块开裂,而且可以预测其严重程度。关键词:路面管理系统;深度学习;街区裂缝;;
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Road Materials and Pavement Design
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