Journal of infrastructure preservation and resilience最新文献_第7页

Life-cycle cost analysis of bridges subjected to fatigue damage 桥梁疲劳损伤全寿命周期成本分析

Journal of infrastructure preservation and resilience Pub Date : 2021-10-11 DOI: 10.1186/s43065-021-00040-3

S. Sacconi, L. Ierimonti, I. Venanzi, F. Ubertini

引用次数: 6

Optimal overlays for preservation of concrete in cold climate: decision-making by the method of fuzzy comprehensive evaluation combined with AHP 寒冷气候下混凝土养护的最优覆盖层——模糊综合评判与AHP相结合的决策

Journal of infrastructure preservation and resilience Pub Date : 2021-10-05 DOI: 10.21203/rs.3.rs-952434/v1

Zhipeng Li, Yudong Dang, Zhenbo Tang, Ning Xie, Shuang Lu, Xianming Shi

{"title":"Optimal overlays for preservation of concrete in cold climate: decision-making by the method of fuzzy comprehensive evaluation combined with AHP","authors":"Zhipeng Li, Yudong Dang, Zhenbo Tang, Ning Xie, Shuang Lu, Xianming Shi","doi":"10.21203/rs.3.rs-952434/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-952434/v1","url":null,"abstract":"Overlays have been extensively employed as an effective preservation or rehabilitation tool to extend the service life of concrete bridges and pavements, especially concrete slabs suffering from salt scaling and abrasion. However, limited attention has been paid to the durability and performance of these overlays which can be jeopardized when they are exposed to freeze/thaw and wet/dry cycles, deicer applications, studded tires, and their coupled effects. Various overlays feature different engineering properties, and they might be only effective in specific service environments but not in others, and research is lacking to examine their ability to adapt to different environments. This study subjected five overlay products on concrete slabs to the combined action of freeze/thaw (F/T) and wet/dry (W/D) cycles with periodical exposure to either 15 wt.% NaCl solution or 15 wt.% MgCl 2 solution, to simulate the typical field scenarios in an accelerated manner. The bond strength, splitting tensile strength, and abrasion resistance of the overlaid concrete slabs were tested to evaluate the effectiveness of various overlays against the deicer scaling and the abrasion by studded tires. Based on the experimental data, this study demonstrated a multi-criteria decision-making method, fuzzy comprehensive evaluation (FCE) combined with analytic hierarchy process (AHP), for the selection of optimal overlays in three different service scenarios (e.g., states of Washington and Oregon [USA] and British Columbia [Canada]). The analysis results indicate that one epoxy overlay exhibited the comprehensively best performance and could be a promising candidate in all three given scenarios, another polymer overlay took second place, while the adaptability of the three cement-based overlays varied in different environments. Graphical Abstract","PeriodicalId":73793,"journal":{"name":"Journal of infrastructure preservation and resilience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43340653","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

Micro-morphologies of SBS modifier at mortar transition zone in asphalt mixture with thin sections and fluorescence analysis SBS改性剂在沥青混合料砂浆过渡区的微观形貌及薄片荧光分析

Journal of infrastructure preservation and resilience Pub Date : 2021-09-08 DOI: 10.1186/s43065-021-00037-y

Xiao, Yue, Yunusa, Mujaheed, Yan, Boxiang, Zhang, Xiaoshan, Chang, Xiwen

{"title":"Micro-morphologies of SBS modifier at mortar transition zone in asphalt mixture with thin sections and fluorescence analysis","authors":"Xiao, Yue, Yunusa, Mujaheed, Yan, Boxiang, Zhang, Xiaoshan, Chang, Xiwen","doi":"10.1186/s43065-021-00037-y","DOIUrl":"https://doi.org/10.1186/s43065-021-00037-y","url":null,"abstract":"The microstructure control of modified asphalt, especially the micro-dispersion of the SBS modifier in the mortar transition zone, is a critical technology for the performance design of modified asphalt. To characterize the micro-dispersive morphology of SBS modifiers, thin-section preparation techniques that can be used to analyze the original microstructure of the asphalt mixture were proposed and introduced in this study. Flexible resin is filled into the mixture at vacuum conditions to ensure accepted sample conditions for preparing thin sections of asphalt mixture. The morphology parameters, including SBS area ratio, box dimension, SBS average particle area and its coefficient of variation, area-weighted average axis ratio, and coefficient of variation, were plotted from fluorescence images to characterize the micro-morphological distribution of the SBS modifier in detail. Results have shown that the area ratio increased with the increase in SBS content, while the box dimension was reduced and the distribution uniformity of the particles decreased. The superfluous SBS modifier in the binder at a too high adding ratio will decrease the value of the box dimension. Lower modification temperature worsened the SBS modifier in the mixture, resulting in a wide range of particle size, higher axis ratio, and higher area ratio. The micro-morphologies of SBS in the asphalt mixture phase varied a lot from the asphalt binder phase. The additional materials of mineral filler and fine aggregate, together with the other heating processes, will significantly influence the swelling state and particle size of the SBS modifier.","PeriodicalId":73793,"journal":{"name":"Journal of infrastructure preservation and resilience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138514273","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

Investigation of rheological properties of asphalt emulsions 乳化沥青流变特性的研究

Journal of infrastructure preservation and resilience Pub Date : 2021-09-07 DOI: 10.1186/s43065-021-00036-z

Enhao Zhang, Xiaofei Qi, Liyan Shan, Dongsheng Li

引用次数: 1

Deformation superposition effect of asphalt mixture based on experiments and micromechanical modeling 基于实验和微观力学模型的沥青混合料变形叠加效应

Journal of infrastructure preservation and resilience Pub Date : 2021-08-11 DOI: 10.21203/rs.3.rs-753316/v1

Chun Li, Xin Bian, Qifeng Dong, Huining Xu

{"title":"Deformation superposition effect of asphalt mixture based on experiments and micromechanical modeling","authors":"Chun Li, Xin Bian, Qifeng Dong, Huining Xu","doi":"10.21203/rs.3.rs-753316/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-753316/v1","url":null,"abstract":"Abstract Under multi-wheel heavy load, the asphalt mixture is prone to exhibit the deformation superposition effect, which exacerbates the damage of pavement structure. Multi-point penetration tests and numerical simulations by discrete element method (DEM) are performed to investigate the deformation superposition effect and micromechanical characteristics of asphalt mixture. The effect of wheel spacing, wheel group, and the evolution of micromechanical deformation superposition behavior are analyzed. Results indicate that the deformation superposition resistance of the asphalt mixture under the multi-wheel load decreases dramatically with the decrease in wheel spacing and the increase in the number of wheels, specifically the wheel spacing is 54 mm and the number of wheels is 4. The DEM simulations reflect the micromechanical property of asphalt mixture in the multi-point penetration test. The reduction of tensile chains is the internal reason for asphalt mixture deformation superposition, indicating the decrease of the adhesive strength of the material. A remarkably positive correlation is found between the reduction of the tensile chain and the deformation effect coefficient. In the process of superposition, the aggregate skeleton force chains are gradually destroyed and decrease to zero until cracking. The numerical simulation outcome is consistent with the laboratory penetration test outcome. (1) Evaluation of deformation superposition behavior of asphalt mixture by the multi-point penetration test. (2) Determinant of the deformation superposition resistance of the asphalt mixture under the multi-wheel load is wheel spacing and the number of wheels. (3) The reduction of tensile chains is the internal reason for asphalt mixture deformation superposition. (4) The numerical simulation method can reflect the laboratory penetration test outcome.","PeriodicalId":73793,"journal":{"name":"Journal of infrastructure preservation and resilience","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44773005","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

Correction to: Roles of mortar volume in porosity, permeability and strength of pervious concrete 修正:砂浆体积在透水混凝土孔隙率、渗透性和强度中的作用

Journal of infrastructure preservation and resilience Pub Date : 2021-08-03 DOI: 10.1186/s43065-021-00035-0

L. Li, Jia-Jian Feng, B. Xiao, S. Chu, A. Kwan

引用次数: 1

Probability assessment of slope instability in seasonally cold regions under climate change 气候变化下季节性寒冷地区边坡失稳的概率评估

Journal of infrastructure preservation and resilience Pub Date : 2021-07-13 DOI: 10.1186/s43065-021-00034-1

Yulong Zhu, T. Ishikawa, T. Yamada, S. Siva Subramanian

引用次数: 2

Roles of mortar volume in porosity, permeability and strength of pervious concrete 砂浆体积在透水混凝土孔隙率、渗透性和强度中的作用

Journal of infrastructure preservation and resilience Pub Date : 2021-07-08 DOI: 10.1186/s43065-021-00033-2

L. Li, Jia-Jian Feng, B. Xiao, S. Chu, A. Kwan

引用次数: 12

Multi-sensor data collection and fusion using autoencoders in condition evaluation of concrete bridge decks 基于自编码器的混凝土桥面状态评估多传感器数据采集与融合

Journal of infrastructure preservation and resilience Pub Date : 2021-06-22 DOI: 10.1186/s43065-021-00032-3

Sepehr Pashoutani, Jinying Zhu, Chungwook Sim, Kwanghee Won, B. Mazzeo, W. Guthrie

引用次数: 9

2D-wavelet based micro and macro texture analysis for asphalt pavement under snow or ice condition 基于二维小波的冰雪条件下沥青路面微观与宏观纹理分析

Journal of infrastructure preservation and resilience Pub Date : 2021-05-07 DOI: 10.1186/s43065-021-00029-y

Feng Li, Gulnigar Ablat, Siqi Zhou, Yixin Liu, Yu-feng Bi, Zihang Weng, Yuchuan Du

引用次数: 8