Article
Construction & Building Technology
Johannes Mirwald, Bernhard Hofko, Hinrich Grothe
Summary: Linking the chemical composition of bitumen to its microstructure is challenging due to its complexity, viscoelasticity, and sensitivity to high energy input. Fluorescence spectroscopy combined with fluorescence microscopy have been used to study the fluorescence behavior and microstructural features of bitumen, showing a decrease in fluorescence intensity and a shift to higher emission wavelength during long-term ageing. Dark-field microscopy confirms the non-homogeneous nature of bitumen on the micro-scale, with an increase in density and number of fluorescent particles over time.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Review
Engineering, Environmental
Kim Schwettmann, Nina Nytus, Sandra Weigel, Martin Radenberg, Dietmar Stephan
Summary: Single reuse of asphalt is approved and rejuvenators are increasingly important in softening the binder, increasing the amount of reclaimed asphalt pavement (RAP), and reducing the dependence on virgin bitumen. The objective of the research is to present the current state of the art regarding the effects of rejuvenators on bitumen ageing and the possibility of cyclic bitumen reuse. Laboratory simulations indicate that repetitive ageing and rejuvenation processes are possible, but it depends on the type of rejuvenator and its interaction with the bitumen sample.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Construction & Building Technology
Stefan Werkovits, Kristina Hofer, Tobias Raphael Schoeberl, Bernhard Hofko, Hinrich Grothe
Summary: A combination of chromatography and spectroscopy was used to analyze the chemical characteristics and ageing processes of bitumen. The fractions and base binder were analyzed using infrared and fluorescence spectroscopy to track the changes in carboxylic acids, quinolones, ketones, sulfoxides, aromatic structures, and the impact of ageing on different molecular classes. Solid-state measurements of the resins revealed characteristic signals of porphyrins and their changes during ageing. This study aims to improve the understanding of complex chemical ageing in bitumen by evaluating different ageing conditions.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Muhammad Jamal, Michele Lanotte, Filippo Giustozzi
Summary: This study investigates the effects of UV radiation on the chemo-mechanical properties of asphalt, comparing it to thermal aging. The results show that thermal aging affects the chemical bonds and rheological properties of asphalt, while UV aging mainly targets hydrocarbon chains. Asphalt modified with crumb rubber shows greater resistance to both UV and thermal aging.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Multidisciplinary Sciences
Alexander H. Bork, Margarita Rekhtina, Elena Willinger, Pedro Castro-Fernandez, Jakub Drnec, Paula M. Abdala, Christoph R. Mueller
Summary: This study investigates the role and growth mechanism of MgCO3 in the CO2 absorption process by MgO in the presence of molten alkali metal salts. Using a model system and combining X-rays and electron microscopy techniques, the study provides insight into the changes occurring at complex interfaces under reactive conditions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Construction & Building Technology
Andreas Schaur, Seraphin Hubert Unterberger, Roman Lackner
Summary: This study investigates the dispersion behavior of different polypropylene polymers within bitumen and their effect on the thermo-mechanical properties of polymer-modified bitumen (PMB). The molecular weight and functional side groups are identified as key parameters affecting the dispersion behavior and thermo-rheological properties of PMB.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Navid Hasheminejad, Georgios Pipintakos, Cedric Vuye, Thomas De Kerf, Taher Ghalandari, Johan Blom, Wim Van den Bergh
Summary: This study aims to construct a deep-learning-based object-detection model that can detect bee patterns in asphalt, showing changes in the microstructure of asphalt due to aging and the relationship between aging levels and roughness parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Energy & Fuels
Yongping Hu, Wei Si, Xingxiang Kang, Yu Xue, Haopeng Wang, Tony Parry, Gordon Dan Airey
Summary: This paper reviews the multiscale evaluations of bitumen ageing behavior, including thermal indices, components and functional groups, microstructural analysis, and analysis at the nanoscale. The study highlights the correlations between different hierarchical scales of bitumen ageing and emphasizes the importance of a multiscale approach for a comprehensive understanding of bitumen ageing.
Article
Chemistry, Multidisciplinary
Vincent De Andrade, Viktor Nikitin, Michael Wojcik, Alex Deriy, Sunil Bean, Deming Shu, Tim Mooney, Kevin Peterson, Prabhat Kc, Kenan Li, Sajid Ali, Kamel Fezzaa, Doga Gursoy, Cassandra Arico, Saliha Ouendi, David Troadec, Patrice Simon, Francesco De Carlo, Christophe Lethien
Summary: In recent years, transmission X-ray microscopes have become excellent tools for non-invasive characterization of nanoscale materials, but their spatial resolution has lagged behind modern nanostructures. Recent optomechanical breakthroughs have enabled fast 3D tomographic acquisitions with sub-10 nm resolution, narrowing the gap between X-ray and electron microscopy.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qianqian Xu, Wenjing Xia, Lazhen Zhou, Zhengwei Zou, Qiuxia Li, Lijun Deng, Sha Wu, Tao Wang, Jingduo Cui, Zhiguo Liu, Tianxi Sun, Junsong Ye, Fangzuo Li
Summary: Liver fibrosis is an important stage in the development of chronic liver disease. In this study, confocal mu-XRF was used to analyze the deposition of iron in liver fibrosis induced by TAA. The results suggest that iron deposition may play a significant role in the progression of hepatic fibrosis induced by TAA.
Article
Biochemistry & Molecular Biology
Elena Alvarez-Marimon, Hiram Castillo-Michel, Juan Reyes-Herrera, Jofre Seira, Ester Aso, Margarita Carmona, Isidre Ferrer, Josep Cladera, Nuria Benseny-Cases
Summary: Amyloid plaques in the cortex of patients with advanced Alzheimer's disease have been characterized into two types: fibrillary plaques with iron accumulation mainly in Fe2+ form, and nonfibrillary plaques with a mixture of beta-sheet and unordered structures where Fe3+ predominates over Fe2+. This distinction in plaque types and metal composition could play a key role in understanding the progression of Alzheimer's disease.
ACS CHEMICAL NEUROSCIENCE
(2021)
Article
Astronomy & Astrophysics
Yoshiki Toba, Teng Liu, Tanya Urrutia, Mara Salvato, Junyao Li, Yoshihiro Ueda, Marcella Brusa, Naomichi Yutani, Keiichi Wada, Atsushi J. Nishizawa, Johannes Buchner, Tohru Nagao, Andrea Merloni, Masayuki Akiyama, Riccardo Arcodia, Bau-Ching Hsieh, Kohei Ichikawa, Masatoshi Imanishi, Kaiki T. Inoue, Toshihiro Kawaguchi, Georg Lamer, Kirpal Nandra, John D. Silverman, Yuichi Terashima
Summary: This study investigates the physical properties of mid-infrared (MIR) galaxies and active galactic nuclei (AGN) at z < 4 observed by eROSITA. The researchers find that a large percentage of the sources are classified as X-ray AGN and have high infrared luminosity.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Chemistry, Analytical
Frank Foerste, Leona Bauer, Korbinian Heimler, Bastian Hansel, Carla Vogt, Birgit Kanngiesser, Ioanna Mantouvalou
Summary: Confocal micro-X-ray fluorescence spectroscopy is a technique that can be used for elemental imaging with 3D resolution using laboratory spectrometers. Quantification techniques are important for interpreting data and reconstructing sample composition and geometry. This article presents an analytical routine for the quantitative investigation of 3D data sets obtained with laboratory spectrometers.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Astronomy & Astrophysics
Brivael Laloux, Antonis Georgakakis, Carolina Andonie, David M. Alexander, Angel Ruiz, David J. Rosario, James Aird, Johannes Buchner, Francisco J. Carrera, Andrea Lapi, Cristina Ramos Almeida, Mara Salvato, Francesco Shankar
Summary: A complete census of active galactic nuclei (AGNs) is necessary for understanding the growth of supermassive black holes. This paper develops a methodology to determine the demographics of heavily obscured AGN using X-ray spectral information and priors from multiwavelength observations. The results suggest a low Compton-Thick AGN fraction and highlight the importance of multiwavelength approaches for studying obscured AGN.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Engineering, Multidisciplinary
H. A. Omar, M. Mubaraki, N. H. Abdullah, A. Al-Sabaeei, A. M. Memon, M. Khan, M. H. Sutanto, N. I. Md Yusoff
Summary: The study evaluated the effects of aging simulation on the physical properties of Nano-Clay Modified Bitumens (NCMBs), showing that incorporation of nano-clay up to 4% increased the hardness of modified bitumen. Aging affected all modified bitumens, with different results observed for consistency tests and AFM tests on aging sensitivity.
Article
Construction & Building Technology
Nadjet Dehouche, Mustapha Kaci, Virginie Mouillet
CONSTRUCTION AND BUILDING MATERIALS
(2016)
Article
Construction & Building Technology
Manuela Lopes, Virginie Mouillet, Liedi Bernucci, Thomas Gabet
CONSTRUCTION AND BUILDING MATERIALS
(2016)
Review
Green & Sustainable Science & Technology
Layella Ziyani, Laurence Boulange, Aurelia Nicolai, Virginie Mouillet
JOURNAL OF CLEANER PRODUCTION
(2017)
Article
Construction & Building Technology
Manuela Lopes, Thomas Gabet, Liedi Bernucci, Virginie Mouillet
MATERIALS AND STRUCTURES
(2015)
Article
Construction & Building Technology
Virginie Mouillet, Fabienne Farcas, Emmanuel Chailleux, Laurent Sauger
MATERIALS AND STRUCTURES
(2014)
Article
Green & Sustainable Science & Technology
S. Vassaux, V Gaudefroy, L. Boulange, A. Pevere, A. Michelet, V Barragan-Montero, V Mouillet
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Construction & Building Technology
S. Vassaux, V. Gaudefroy, L. Boulange, A. Pevere, A. Michelet, V. Barragan-Montero, V. Mouillet
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Chemistry, Physical
Ao Huang, Gang Liu, Virginie Mouillet, Saannibe Ciryle Some, Tingwei Cao, Haoliang Huang
Summary: This study compared the long-term ageing kinetics of hot mix asphalt (HMA) and warm mix asphalt (WMA) produced with the same base bitumen. It found that the warm agent and foaming water significantly decreased the viscosity of the binder at high temperatures, improving the ageing resistance of the WMA. However, a higher content of foaming water deteriorated the viscosity, suggesting a lower content of warm agent and foaming water is recommended for foamed WMA preparation.
Article
Mechanics
Akoete Bernus Kouevidjin, Jean-Francois Barthelemy, Saannibe Ciryle Some, Hachmi Ben Dhia, Virginie Mouillet
Summary: This paper presents the development of a mechanical crack propagation model coupling viscoelasticity and the extended Griffith's criterion. The model is applied to study the mode I cracking of bituminous materials under intermediate temperature condition and long term ageing duration. The viscoelastic behavior of these materials based on a Generalized Maxwell (GM) model is described and a discretized form of the state equation based on the exponential algorithm is given. The proposed model is validated using simulation of the complex modulus test. The thermodynamic framework of the Griffith criterion is extended to the GM's model and a crack growth criterion is derived. The application of the criterion on a semi-circular bending geometry is presented and validated through numerical simulations and experiments. The study shows that the proposed approach can effectively capture the ductile fracture properties of bituminous mixes.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Saannibe Ciryle Some, Jean-Francois Barthelemy, Virginie Mouillet, Ferhat Hammoum, Gang Liu
Summary: This study investigates the multiscale modeling of the complex modulus and phase angle of aged hot and warm mix asphalt and bituminous mortar. The results show that the stiffness moduli of binders and mixes increase with the long-term thermo-oxidative ageing duration, with a more pronounced increase for WMA. A multi-scale model combining Mori-Tanaka scheme and self-consistent scheme is implemented to predict the evolution of the stiffness moduli and phase angles of the mixes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Faycal Lahjiri, Virginie Mouillet, Anne Dony, Layella Ziyani, Sabine Gazeau, Freideric Delfosse, Michael Sztucki, Philippe Dieudonne-George, Francois Henn
Summary: An oxidative aging treatment was conducted on fresh 10/20 and 35/50 bitumens in the laboratory to simulate long-term aging on road pavements. The aging treatment resulted in the oxidation of less polar aromatic species into more polar content, as confirmed by FTIR, SAR-AD, and SAXS techniques. The size of nanoaggregates and primary clusters increased, leading to changes in the macroscopic rheological properties of the aged bitumens.
Proceedings Paper
Construction & Building Technology
Faycal Lahjiri, Sabine Gazeau, Frederic Delfosse, Anne Dony, Layella Ziyani, Virginie Mouillet, Francois Henn
PROCEEDINGS OF THE 5TH INTERNATIONAL SYMPOSIUM ON ASPHALT PAVEMENTS & ENVIRONMENT (APE)
(2020)
Proceedings Paper
Construction & Building Technology
Sabine Vassaux, Vincent Gaudefroy, Laurence Boulange, Audrey Pevere, Virginie Mouillet
RILEM 252-CMB SYMPOSIUM: CHEMO-MECHANICAL CHARACTERIZATION OF BITUMINOUS MATERIALS
(2019)
Article
Construction & Building Technology
S. Vassaux, V. Gaudefroy, L. Boulange, A. Pevere, V. Mouillet, V. Barragan-Montero
CONSTRUCTION AND BUILDING MATERIALS
(2017)
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)
