A5061809373- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Petroleum Processing and Analysis
- High voltage insulation and dielectric phenomena
- Lignin and Wood Chemistry
- Transport Systems and Technology
- Climate change and permafrost
- Smart Materials for Construction
- Innovative concrete reinforcement materials
- Geotechnical Engineering and Underground Structures
- Water Systems and Optimization
- Enhanced Oil Recovery Techniques
- Material Properties and Processing
- Geotechnical Engineering and Soil Mechanics
- Concrete and Cement Materials Research
- Advanced Sensor and Control Systems
- Advanced Computational Techniques and Applications
- Landslides and related hazards
- Concrete Corrosion and Durability
- Air Quality and Health Impacts
- Power Transformer Diagnostics and Insulation
- Drilling and Well Engineering
- Concrete Properties and Behavior
- Functional Brain Connectivity Studies
- Geotechnical Engineering and Soil Stabilization
Delft University of Technology
2015-2024
Oxidative ageing and moisture damage are key factors in bitumen degradation asphalt pavement deterioration. The effects of oxygen on governed by their transport reaction processes. This paper provides an overview theories concepts developed to describe the kinetics, thermodynamics mechanisms within bitumen. moisture- oxygen-induced changes physicochemical mechanical properties also discussed. aim is summarize literature findings conclusions discuss possibilities establishing coupled...
This study aimed to explore the long-term aging influence on chemo-rheological properties and develop novel consecutive models for reaction kinetics of bitumen. The results revealed that index was significantly dependent types selected parameters. Zero-order model suitable describe bitumen based oxygen-containing functional groups with rate constants in 0.7–3.3*10−4 (mol L−1·h−1). In SARA-based model, most optimum aromatic fraction Third-order corresponding constant (k1) 0.02...
The chemical characterization of bitumen type and ageing state are fundamental in determining structural mechanical properties bitumen. This work aims to classify various types at different states identify the primary differences relevant classification. Fourier transform infrared (FTIR) spectral data eight five were analyzed using a chemometric procedure that incorporates principal component analysis (PCA), linear discriminant (LDA) models, variable selection methods. models presented...
This study aims to multiscale investigate the effects of rejuvenator type, temperature, and aging degree bitumen on diffusion behaviors rejuvenators (bio-oil BO, engine-oil EO, naphthenic-oil NO, aromatic-oil AO) in aged binders. The molecular dynamics (MD) simulation method is performed detect molecular-level characteristics predict their coefficient (D) parameters. At an atomic scale, mutual but partial interfacial feature between molecules observed. Moreover, Fick's Second Law well fits...
Oxidative aging induces significant stiffening of asphalt binders that leads to a pronounced reduction in the overall durability pavements. The strategic implementation antioxidant additives provides potential solution alleviate this issue. This work presents results from second phase global consortium for antioxidants research aimed at investigating effectiveness increasing binders. Sixteen laboratories around world participated effort and total 28 diverse geographical regions were tested....
Bitumen ageing has a significant impact on the mechanical performance of asphalt concrete. This study utilises dynamic tests (frequency sweep, fatigue, and relaxation) to investigate effect viscoelastic characteristics bitumen. As progressed, shift Black diagrams curves towards lower phase angles was observed; at same time shape changed straight line curvature reduced. Interestingly, based standard fatigue analysis criteria, appears have positive bitumen life. Consequently, it occurs that...
As bitumen oxidizes, material stiffening and embrittlement occur, eventually cracks. The use of anti-oxidants, such as lignin, could be used to delay oxidative aging extend the lifetime asphalt pavements. In this study, chemical rheological effect lignin on was evaluated by using a single dosage organsolv (10 wt.% dosage). A pressure vessel (PAV) simulate long-term process after performing standard short-term procedure, lignin-modified bituminous binders were characterized an environmental...
Oxidative aging takes place in bituminous materials during the construction and service life of asphalt pavements has a significant effect on their performance. In this study, porous cores were obtained from field test sections each year 2014 to 2017. The evolution properties recovered bitumen with time was investigated. Cyclic indirect tensile tests performed determine changes mechanical behavior due aging. Additionally, extracted 13 mm slices along depth cores. rheological chemical...
Ageing has a significant impact on the chemical and mechanical properties of bituminous materials. In this study, Fourier Transform Infrared (FTIR) spectrometer Dynamic Shear Rheometer (DSR) tests were utilised to investigate effect ageing rheological bitumen. Bitumen films with thickness 2 mm exposed laboratory at various conditions. Specifically, different combinations time, temperature pressure applied bitumen samples. The FTIR results used quantify changes in functional groups calculate...
Water transport is one of the major factors responsible for moisture damage in asphalt pavements. To study thermodynamics and kinetics water bitumen to uncover microscale mechanisms moisture-induced damage, molecular dynamics simulations were performed up 600 ns water–bitumen systems with realistic contents that varied from 0 1.76 wt%. Hydrogen bonding interactions clustering molecules at various combinations temperature content investigated, their effects on self-diffusion coefficient...
Lignin, one of the most abundant natural polymers, has been extensively studied as an additive in bituminous binders. Even though lignin improves overall resistance against oxidative aging bitumen, it could lead to high thermal cracking sensitivity. In this study, a bio-oil (i.e., rapeseed oil) is implemented lignin-modified bitumen ameliorate characteristics, such fatigue and cracking. The long-term bitumens formulated by different proportions was simulated pressure vessel (PAV) method....
Bitumen in asphalt pavements reacts slowly with atmospheric oxygen, resulting oxidative ageing. This reaction is strongly dependent on the physical diffusion of oxygen into bitumen. study aims to use molecular dynamics (MD) simulation investigate bitumen film and analyse effects anti-ageing compounds (AACs) diffusion. The MD simulations using a Polymer Consistent Force Field (PCFF) were conducted bitumen-air bi-layer model at different temperatures. Fick's second law was used calculate...
Abstract Small‐world networks are of great significance in the field neuroscience. As universal nature human brain network, their heterogeneous pattern change patients with different diseases may satisfy need for auxiliary objective diagnostic tests. In recent years, combining non‐invasive neuroimaging techniques (e.g., magnetic resonance imaging, electroencephalography, and magnetoencephalography) graph‐theory‐based network topology analysis has provided a new direction exploring addition,...
Two types of elastomer/plastic compound-modified bitumen were developed by means incorporating the reactive elastomeric terpolymer (RET) into plastic (high-density polyethylene HDPE or recycled RPE) modified and adding wax residue (WR) bitumen/elastomer (crumb rubber CR styrene–butadiene–styrene SBS) blends. The rheological properties, morphology microstructure storage stability these novel binders characterised. results revealed that RET elastomer positively improved high-temperature...
The rejuvenation efficiency of aged bitumen is the main concern when developing rejuvenating agents. It necessary to develop a method assess rejuvenators using rheological parameters in whole frequency region. To this end, 2S2P1D micromechanics model adopted fit entire G∗ master curves various rejuvenated bitumen, and influence rejuvenator type/dosage aging grade on curve chemical indices are investigated. Critical for evaluating derived from viscoelastic models characterizations proposed....
The degradation of bituminous materials as a result ageing has significant effect on asphalt pavement performance. In this study, one porous (PA) section and stone mastic (SMA) were designed constructed in 2014 exposed to the actual environmental condition. To study change pavement’s mechanical properties, cores collected from both test sections annually. stiffness modulus was determined via cyclic indirect tensile tests. investigate behavior across depth, bitumen extracted recovered 13 mm...
Moisture in bitumen and at the bitumen-aggregate interface affects cohesive adhesive properties of asphalt mixtures, which are critical for service performance durability pavements. This paper aims to investigate kinetics thermodynamics moisture transport various temperatures relative humidity different types. Transport models introduced study mechanisms. A parameter optimization approach combined with finite element method is applied simulate behavior. Results show salient sorption increase...
Asphalt mortar is a mixture of bitumen, filler, and sand. Mortar plays an important role in asphalt mixtures as it serves the adhesive between coarser aggregates. Due to effect bitumen ageing, chemical mechanical properties evolve with time. The becomes more brittle prone cracking, thus leading inferior pavement performance. In this study, Fourier transform infrared (FTIR) spectrometry was used quantify changes functional groups related ageing calculate carbonyl sulfoxide indices. addition,...
The rejuvenation of epoxy modified bituminous binders is a topic much debate because such may not be able to melt at high temperatures and restore their properties using recycling agents. This paper presents the results an experimental program developed evaluate re-usability bitumen, or by three agents: aromatic-based agent, aliphatic-based soft binder. impact these agents on response aged was assessed performing analyses in Fourier Transformed Infrared spectroscopy Dynamic Shear Rheometer....
The Guide for Design of Pavement Structures (AASHTO 86/93) and Mechanistic Empirical (MEPDG) are two common methods to design continuously reinforced concrete pavement (CRCP) published by the American Association State Highway Transportation Officials (AASHTO) in USA. AASHTO 86/93 is based on empirical equations assess performance highway pavements under moving loads with known magnitude frequency derived from experiments road tests. MEPDG a method engineering mechanics numerical models...
Subgrade and foundation soils undergo freeze thaw cycles in seasonally frozen regions that leads to changes its mechanical properties, causing the degradation of service performance. This study aims investigate effects freeze–thaw on dynamic properties compacted silty clay. Specifically, number cycle, confining pressure, initial compaction degree, water content shear modulus damping ratio were studied by using resonant column tests. The test results showed both maximum clay sample had a...