Article
Construction & Building Technology
M. Lagos-Varas, D. Movilla-Quesada, A. C. Raposeiras, P. Monsalve-Carcamo, D. Castro-Fresno
Summary: The development of polymer-modified asphalt (PMA) has been widely used for its potential performance and cost improvements. Sasobit wax has been proposed as an alternative to reduce costs in Crumb-Rubber (CR) and Styrene-Butadiene-Styrene Copolymer (SBS) binders. However, there is limited research on the rheological behavior of CR-SBS-Sasobit triple-modified samples. This study examines the properties of binders with triple modification of CR-SBS-Sasobit at different dosages. The results demonstrate that the triple modification with CR-SBS-Sasobit achieved higher elasticity, reduced deformation, and increased fatigue life, making it a viable option for enhancing the strength of bitumen.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Zhengang Feng, Fengjie Cai, Dongdong Yao, Xinjun Li
Summary: The study found that SBS bitumen modified with three types of UV absorbers showed improved resistance to thermal-oxidative and UV aging. However, the impact of different UVAs on aging properties varied depending on the type of SBS polymer used.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Characterization & Testing
Laurent Porot, Jiqing Zhu, Di Wang, Augusto Cannone Falchetto
Summary: The increasing demand for high-performing roads has led to the widespread use of complex bituminous binders. In recent years, attention has been focused on evaluating the rutting resistance of these binders, with the multiple stress creep recovery (MSCR) test gaining popularity. This paper presents an analysis of MSCR results and compares them with other test methods.
JOURNAL OF TESTING AND EVALUATION
(2023)
Article
Construction & Building Technology
Seyed Reza Omranian, David Hernando, Ali Arab, Meor Othman Hamzah, Choong Kok Keong, Cedric Vuye, Wim Van den Bergh
Summary: This study validated the empirical approach proposed by Shalaby to model short-term aging of asphalt binders, showing that it can accurately predict the effects of aging duration and temperature on binder performance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Luca Desidery, Michele Lanotte
Summary: This study identifies undisclosed crystalline modifiers (UMs) in high polymer-modified binders (HiPMBs) and evaluates their effects on aging phenomena using thermo-chemical and microstructural analyses. The properties of several industrial HiPMBs were evaluated through FT-IR, DSC, FM, and AFM. Results show that calorimetric analysis can readily identify crystalline UMs in most binders. Unlike SBS thermoplastic elastomers, UMs drastically alter the surface microstructure of all binders, causing the disappearance of typical bee-like structures and the emergence of undefined topographies due to interactions with bituminous waxes. The homogeneity of the binders' amorphous phases is not significantly affected. Aging processes affect base bitumen, SBS, and UMs, with the oxidation of bitumen and degradation of SBS evaluated through FT-IR absorption bands and Tg values, and variations in DSC endotherms reflecting the influence on the crystallinity of UMs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yuqing Zhang, Yangming Gao
Summary: This study successfully predicted the crack length in viscoelastic bitumen under a rotational shear fatigue load using the DSR-C model, showing initial transition period, steady growth period, and rapid growth period under different loading and material conditions.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Yanjun Qiu, Hong Zhang, Haibo Ding, Ali Rahman
Summary: This study considers asphalt as a mixed system with multiple solid and liquid phases and describes the non-ideality of these phases using activity coefficients. By applying phase equilibrium and regular solution theory, the researchers calculated the solid-liquid fraction under equilibrium conditions and determined the precipitation temperature and amount of paraffin wax in asphalt. Gas chromatography-mass spectrometry was used to measure the distribution of paraffinic, naphthenic, and aromatic components in the asphalt. The results were compared to experimental measurements, and adjustments were made to improve the accuracy of the theoretical model.
MATERIALS & DESIGN
(2022)
Article
Mathematics, Applied
Antonio De Martino
Summary: In this paper, we investigate how the short-time Fourier transform can be extended in a Clifford setting, proving some of its main properties and demonstrating the effects of modulating and translating the signal and the window function. Finally, we demonstrate Lieb's uncertainty principle for the Clifford short-time Fourier transform.
APPLIED MATHEMATICS AND COMPUTATION
(2022)
Article
Engineering, Civil
Fayssal Cheriet, Alan Carter, Smail Haddadi
Summary: The study evaluated the performance of hot mix asphalt modified with crumb rubber through temperature influence and digestion time between bitumen and rubber. The results indicated a direct relationship between bitumen and rubber interaction with temperature and contact time. At high temperature and long contact time, a significant increase in rubber mass was observed, leading to a decrease in light fractions in bitumen and consequent stiffening. Additionally, FTIR analysis showed only a physical interaction between the components.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Jiqing Zhu, Joacim Lundberg, Liang He, Guannan Li
Summary: This study proposes to extend the Black diagram to three dimensions by adding a temperature axis, which allows for a more accurate evaluation of the temperature and time dependency of bitumen.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Lorris Bruneau, Severine Tisse, Laurent Michon, Pascal Cardinael
Summary: It has been known for many years that the creation of oxygenated functional groups, such as carbonyl and sulfoxide, is a major factor contributing to the chemical aging and degradation of asphalt. This paper focused on studying the oxidation process of asphalt during a pressure aging vessel (PAV) test. The research found that the oxidation level within the asphalt matrix was nonhomogeneous, with the lower section exhibiting significantly lower carbonyl and sulfoxide indices compared to the upper surface. The difference in oxidation level between the top and bottom surfaces increased with thicker and more viscous asphalt samples.
Article
Engineering, Civil
Peyman Aghazadeh Dokandari, Ali Topal, Derya Kaya Ozdemir
Summary: The study investigated the quality issues of using Reclaimed Asphalt Pavement (RAP) in asphalt pavements, and demonstrated that the utilization of rejuvenators can significantly improve the quality of recycled asphalt while threatening the quality of aged bitumen. Results also showed that the Rejuvenation Index (RI) can illustrate this fact effectively.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Mathematics, Applied
Ramanathan Kamalakkannan, Rajakumar Roopkumar, Ahmed Zayed
Summary: In this paper, a short-time coupled fractional Fourier transform (SCFRFT) is introduced using the kernel of the coupled fractional Fourier transform (CFRFT). The authors prove its satisfaction of Parseval's relation, derive its inversion and addition formulas, and characterize its range on L-2(R-2). The study also includes analysis of its time delay and frequency shift properties, and concludes with an uncertainty principle for both the coupled fractional Fourier transform and short-time coupled fractional Fourier transform.
FRACTIONAL CALCULUS AND APPLIED ANALYSIS
(2021)
Article
Engineering, Electrical & Electronic
Gaowa Huang, Feng Zhang, Ran Tao
Summary: The short-time fractional Fourier transform (STFRFT) is a powerful tool for processing signals with fractional frequencies that vary over time. However, the existing discrete algorithms are not suitable for real-time applications that require recalculating the STFRFT at each or several samples. To solve this problem, a new sliding algorithm, called the sliding STFRFT, is proposed. It directly computes the STFRFT at the given time using the output result of the previous time step, significantly reducing computation complexity. The proposed algorithm has been shown to have the lowest computational cost among existing STFRFT algorithms.
IEEE SIGNAL PROCESSING LETTERS
(2022)
Article
Engineering, Civil
Giuseppe Crescenzo, Celine Villa, Roland Bremond, Valeria Vignali, Claudio Lantieri, Andrea Simone
Summary: Road markings visibility is assessed using the visibility level (VL), and several models have been developed to calculate visibility distance on the road by estimating the diameter of an 'equivalent' disc.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-TRANSPORT
(2022)
Article
Engineering, Industrial
Claudio Lantieri, Marco Costa, Valeria Vignali, Ennia Mariapaola Acerra, Pierclaudio Marchetti, Andrea Simone
Summary: The study found that flashing in-curb LED strips and beacons significantly increased yielding compliance and the distance at which pedestrians were detected by drivers when approaching a crosswalk at night.
Article
Chemistry, Physical
Giulio Dondi, Francesco Mazzotta, Claudio Lantieri, Federico Cuppi, Valeria Vignali, Celestino Sangiovanni
Summary: The use of CDM can be a suitable solution for the construction or rehabilitation of road pavements, helping to minimize waste production. Steel slag as aggregate in bituminous mixes has shown stability and increased stiffness in laboratory performance tests.
Article
Construction & Building Technology
Valeria Vignali, Ennia Mariapaola Acerra, Claudio Lantieri, Federica Di Vincenzo, Giorgio Piacentini, Stefano Pancaldi
Summary: The use of new technologies like I-BIM is revolutionizing the field of infrastructure design and construction, allowing for optimized and validated road projects that interact with the surrounding environment.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Materials Science, Multidisciplinary
Navid Ghasemi, Ennia Mariapaola Acerra, Claudio Lantieri, Andrea Simone, Federico Rupi, Valeria Vignali
Summary: This study investigates the effectiveness of mid-block bicycle crossing elements through real road experiments, analyzing drivers' behavior. The results show that red colored pavement improves visibility of the crossing zone, while the overhead bicycle crossing sign restricts drivers' visual field.
Article
Materials Science, Multidisciplinary
Francesco Censorii, Luca Cotignoli, Valeria Vignali, Alberto Bartoli
Summary: In this study, the Envision framework is used to evaluate the sustainability and resilience of road projects in Italy. The authors have upgraded the framework to comply with the Italian regulatory framework for road infrastructures. The evaluation considers not only pavement analysis but also the complete project process.
Article
Environmental Sciences
Margherita Pazzini, Leonardo Cameli, Claudio Lantieri, Valeria Vignali, Giulio Dondi, Thomas Jonsson
Summary: The negative effects of widespread car use, such as congestion, pollution, noise, and accidents, are impacting cities globally. Shared electric scooters and bicycles have the potential to promote sustainable transportation, but some local governments have not yet integrated them into their transportation systems. Unclear legislation makes it difficult to determine whether electric scooters should be classified as bicycles or vehicles. Additionally, predicting their impact on road traffic and interactions with pedestrians and cyclists is challenging. This study analyzed the speed and behavior of electric scooter drivers in Trondheim, Norway, to inform policies for their safe integration into cities.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Energy & Fuels
Roberto Battistini, Fabrizio Passarini, Rita Marrollo, Claudio Lantieri, Andrea Simone, Valeria Vignali
Summary: University campuses have a significant impact on hosting cities and territories, and sustainable policies are crucial in reducing this impact. This paper presents a carbon footprint methodology specifically designed for large universities, applied to the University of Bologna to assess its environmental impact. The study compares the carbon footprint in 2020 and 2018, highlighting changes in emissions sources.
Article
Green & Sustainable Science & Technology
Rachele Corticelli, Margherita Pazzini, Cecilia Mazzoli, Claudio Lantieri, Annarita Ferrante, Valeria Vignali
Summary: This study focuses on the Rimini Canal Port as a case study to address the increasing need for reducing emissions and environmental impact in urban areas. Through a historical-documental and urban regulations analysis, the main issues and potentials were identified and evaluated using a SWOT analysis. The involvement of stakeholders enabled a successful participatory co-design process, leading to the resolution of critical issues and the improvement of cycle/pedestrian paths and the flooding docks in the Canal Port area. The findings highlight the significant impact of soft mobility on urban regeneration projects.
Article
Chemistry, Multidisciplinary
Roberto Battistini, Alessandro Nalin, Andrea Simone, Claudio Lantieri, Valeria Vignali
Summary: Studying the attitudes and behaviors of university student cyclists can help improve urban cycling. This study used a comprehensive methodology including direct observation, GPS detection, GIS processing, and qualitative survey to evaluate the cycling habits of over 300 students from the University of Bologna. The findings provide insights into their cycling preferences and mobility patterns.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Ennia Mariapaola Acerra, Gian Franco Daniel Busquet, Marco Parente, Margherita Marinelli, Valeria Vignali, Andrea Simone
Summary: The study demonstrates that the I-BIM approach is a powerful tool for optimizing and validating infrastructure design, allowing users to visualize how the infrastructure integrates into the real 3D environmental context.
Article
Green & Sustainable Science & Technology
Rachid Belaroussi, Margherita Pazzini, Israa Issa, Corinne Dionisio, Claudio Lantieri, Elena Diaz Gonzalez, Valeria Vignali, Sonia Adele
Summary: By engaging users early in the design process, the design of infrastructure for sustainable mobility can be improved. The study presents data collected from a virtual reality application evaluating user perception in an urban redevelopment context. The ratings of the article: 8 out of 10.
Article
Construction & Building Technology
Ennia Mariapaola Acerra, Murad Shoman, Hocine Imine, Claudia Brasile, Claudio Lantieri, Valeria Vignali
Summary: Cyclist safety is crucial due to the increasing use of bicycles as a means of transportation. This study highlights the critical points of infrastructure and interactions with different road users through visual tracking and a bicycle simulator. A comparison between real tests and simulations reveals objective differences in behavior and a low workload perception by cyclists.
Article
Construction & Building Technology
Margherita Pazzini, Leonardo Cameli, Claudio Lantieri, Valeria Vignali, Daniele Mingozzi, Giuseppe Crescenzo
Summary: BIM has greatly improved the design process and is now being applied to road infrastructure construction. The I-BIM methodology helps designers consider all aspects of the project, including sustainability, during construction and execution.
Article
Transportation
Federico Cuppi, Valeria Vignali, Claudio Lantieri, Luca Rapagna, Nicola Dimola, Tomaso Galasso
Summary: The European Rail Traffic Management System (ERTMS) aims to standardize railway signals in Europe and improve network performance. The High-Density European Traffic Management System (HD-ERTMS) has been developed as a solution to address congestion at railway nodes without changing current infrastructure. Introducing this new signalling system, such as in the case study of the Rome railway node, is expected to bring about significant benefits.
JOURNAL OF RAIL TRANSPORT PLANNING & MANAGEMENT
(2021)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
