Complex Shear Research Articles

A novel approach to predict the rheological properties of rejuvenated binder subject to secondary aging

The recycling of asphalt concrete pavement not only requires to restore the original properties of reclaimed asphalt pavement (RAP) materials, but also consider the properties due to secondary aging simultaneously. Therefore, in order to design recycled asphalt mixtures for construction of sustainable pavement with good performances, it is very important to understand and predicted the viscoelastic behaviors of rejuvenated binders. However, limited studies on the effect of rejuvenator dosage and secondary aging in the rheological behavior of rejuvenated binder are reported. In this study, a novel approach was used to construct the dosage-aging master curves to describe and predict the viscoelastic behaviors of rejuvenated binders considering the effect of rejuvenator dosage, aging time and aging temperature. Experimental data of complex modulus and phase angle were used to validate the proposed approach. Rejuvenated binders with rejuvenators at four dosages were aged at various aging temperature and times. Complex shear modulus and phase angle isotherms of each rejuvenated binders for a range of frequencies were constructed simply starting from time-temperature superposed master curves. Two rotations and horizontal shifts procedure were applied to the master curves. Finally, the dosage-aging complex modulus and phase angle master curves were proposed. It was found the twice rotation of master curves of rejuvenated binder process was used to change the shapes of the master curves due to rejuvenator dosage and aging based on the dosage-aging rotation factor. The twice horizontally shifted process was used to shift the master curves after twice rotation to the master curves at the reference dosage, aging time and temperature based on the dosage-aging horizontal shift factor. The twice rotation and horizontal shift processes are suitable for rejuvenated binder for using other dosage under other aging conditions, the predicted dosage-aging master curves can be obtained and is good accordance with the measured master curve. Therefore, the complex shear modulus and phase angle values of rejuvenated binders over a range of dosages at any aging time and temperature can be predicted without actual testing.

Evaluation Method and Influence Law of UV-Cured Polyurethane on the Self-Healing Performance of Asphalt and Asphalt Mixtures

To explore the effect of UV-curable polyurethane (UV-PU) on the self-healing performance (SHP) of asphalt and asphalt mixtures, this article conducted research in this area of the evaluation method and influenced the law. polyurethane (PU), Styrene-Butadiene-Styrene Block Copolymer (SBS Ι-C) and 70# asphalt and asphalt mixtures were introduced as the example of comparison. A method for evaluating the SHP of asphalt, sand asphalt mixture, and medium particle asphalt mixture using the healing index (HI) as an evaluation index was proposed, and the healing performance of various materials under different healing conditions was tested and analyzed. The research results indicate that, HI based on asphalt complex shear modulus (HIA), HI based on sand type asphalt mixture (AC-5) flexural tensile strength (HIAC-5), and HI based on medium grained asphalt mixture (AC-16) bending stiffness modulus (S) HIAC-16 can effectively reflect the SHP of asphalt, AC-5, and AC-16 under different healing conditions, and can be used as an evaluation indicator for SHP. The asphalt SHP is related to the asphalt type and the degree of initial loss and is highly correlated with the healing time. Compared to other asphalt types, the sensitivity of UV-PU or PU modified asphalt to initial loss is lower than that of SBS Ι-C modified asphalt, but higher than 70# asphalt. Under the same light healing time and initial degree of loss, the SHP of UV-PU modified asphalt AC-5 and AC-16 is significantly superior to other types of asphalt mixtures. Compared to asphalt, the self-healing time of AC-5 grade AC-16 is longer. The SHP of AC-16 is highly correlated with the loss degree associated with the initial S. The larger the initial loss degree of the S, the greater the loss rate of the HI.

Strain fields as local probe for X-ray diffraction tomography: Non-destructive reconstruction of shear band paths in metallic glasses

Shear bands are nanoscale topologically complex planar shear defects mediating plasticity in metallic glasses and a complete understanding of the shear banding phenomenon requires their three-dimensional characterization; however, we have been unable to tomographically and not-destructively reconstruct the path of shear bands inside a sample until now as X-ray absorption (or phase contrast) tomography is currently unable to distinguish shear bands from the surrounding matrix. Here, we overcome this limitation using the strain field generated by shear bands in the adjacent material as a local probe for X-ray diffraction tomography. This strain field is the analogue of the contrast agents used in conventional clinical tomography, allowing us to non-destructively reconstruct the shear band paths within the glassy specimens. Tomography is based on collecting a series of projections recorded at different angles while the specimen is rotated about a single axis. In this work, we first use full-angle tomography (reconstruction based on projections collected over 360°), which allows reconstructing the paths in excellent detail revealing features of shear banding that are not accessible to other analytical tools. A dataset with missing angles (projections over less than 360°) degrades the reconstruction but opens the door to in-situ measurements during deformation.

Regulation of Entanglement Networks under Different Shear Fields and Its Effect on the Properties of Poly(l-lactide)

Entanglement will lead to a sharp increase in viscosity and a decrease in flowability of polymers and affect their crystallization behavior adversely. Thus, it seems that disentanglement becomes a feasible way to improve the flowability and crystallization ability of polymers without adding other substances. Poly(l-lactide) (PLLA), as a renewable polymer material, has attracted increasing attention in the past decades. Accelerating crystallization of PLLA is extremely important to improve its performance. The present study utilizes a self-designed polymer melt disentanglement machine (PMDM) with PLLA as the experimental material, which can effectively promote polymer disentanglement by applying a unique complex shear field (superposition of rotational and vibrational shear fields) to a polymer melt. The experimental results show that compared with the untreated material, the disentangled ones have a lower viscosity and a higher melt flow rate and can fill the mold cavity at a lower pressure and a lower melt or mold temperature during the injection molding process. Simultaneously, the crystallization kinetics of the disentangled materials is accelerated, the crystallinity is higher under the same secondary processing conditions, and the heat resistance and mechanical properties of prepared products are better. This study provides new ideas for resolving the conflict between mechanical properties and processing flowability, improving the heat resistance of PLLA, and expanding its application range.

Assembly of plant-based meat analogs using soft matter physics: A coacervation-shearing-gelation approach

High-energy processing equipment, like extruders or shear cells, are normally required to create fibrous plant-based meat analogs with textures and mouthfeels designed to mimic those of real meat. Here, we propose a simple low-energy method of creating fibrous structures using a soft matter physics approach, which involves complex coacervation, shearing, and gelation of protein/polysaccharide mixtures. A mixture of potato protein and gellan gum was used to create the chicken analogs. Initially, potato protein (10, 15, or 20 wt%) and gellan gum (3 or 4 wt%) were mixed to produce aqueous solutions under conditions where coacervates should form due to electrostatic attraction between the proteins and polysaccharides. This solution was then sheared to elongate and align the coacervates into fiber-like structures. Finally, the mixtures were heated (90 °C, 30 min) to induce thermal denaturation of the proteins, which stabilized the fibrous structures by gelling the proteins. The textural, rheological, and thermal properties of the chicken analogs were characterized and compared to those of real chicken. The texture and rheology of the chicken analogs became increasingly close to real chicken as the protein content of the plant-based chicken was increased from 10 to 20 wt%. Differential scanning calorimetry showed that the thermal denaturation of the potato proteins in the chicken analogs occurred over a similar temperature range as the myosin proteins in real chicken. Thermogravimetric analysis showed that the chicken analogs containing 20 wt% protein behaved the most similarly to real chicken during heating. Analysis of the appearance and microstructure of the chicken analogs showed they had aligned fibrous structures like those found in real chicken. This study suggests that soft matter physics approaches can be used for the creation of fibrous structures and the development of plant-based meat analogs.

Activity-dependent glassy cell mechanics Ⅰ: Mechanical properties measured with active microrheology

Active microrheology was conducted in living cells by applying an optical-trapping force to vigorously fluctuating tracer beads with feedback-tracking technology. The complex shear modulus G(ω)=G′(ω)−iG″(ω) was measured in HeLa cells in an epithelial-like confluent monolayer. We found that G(ω)∝(−iω)1/2 over a wide range of frequencies (1 Hz < ω/2π < 10 kHz). Actin disruption and cell-cycle progression from G1 to S and G2 phases only had a limited effect on G(ω) in living cells. On the other hand, G(ω) was found to be dependent on cell metabolism; ATP-depleted cells showed an increased elastic modulus G′(ω) at low frequencies, giving rise to a constant plateau such that G(ω)=G0+A(−iω)1/2. Both the plateau and the additional frequency dependency ∝(−iω)1/2 of ATP-depleted cells are consistent with a rheological response typical of colloidal jamming. On the other hand, the plateau G0 disappeared in ordinary metabolically active cells, implying that living cells fluidize their internal states such that they approach the critical jamming point.

В’язкопружні властивості суспензій кукурудзяного крохмалю на електрохімічно активованій воді

Water has the ability to regulate the physiological processes of the human body, which characterizes its biological activity. Macro- and microelements, vitamins, amino acids, etc. enter the body with water and food. Nowadays, the issue of the influence of activated water on the structure and course of processes in food systems with its content is insufficiently covered in scientific sources, which is a perspective for research. Due to its physical and chemical properties, activated water can influence the quality indicators and structure of products containing it. Thus, in the recipes of many products, corn starch is used as an emulsifier. The purpose of the research was to determine the effect of activated water on the viscospringy indicators of corn starch suspensions. Activated water significantly affects the elastic and viscous properties of corn starch suspensions. The storage mo dulus of the samples on the catholyte and anolyte at 25 °С had a significantly higher value than the shear modulus of the control sample at zero frequency. This indicator increased with increasing frequency. The loss modulus of all samples of starch pastes increased with an increase in the scanning frequency, however, at the pasteurization temperature, the increase occurred less intensively: in the frеquency range of 0.1—10 Hz for the sample on tap water, the studied indicator increased by 63.6±0.5 times, on the catholyte and anolytes — 41.5±0.5 and 43.7±0.5 times, respectively. At 25 °С, this indicator increased by 41.7±0.5; 22.1±0.5 and 23.1±0.5 times. Over the entire range of the frequency sweep, the complex shear stress of suspensions increased, and the control indicators at 25 °С and at 68 °С were lower than the corresponding values for suspensions on catholyte and anolyte. Thus, activated water affects the rheological indicators of starch suspensions, which in turn will be reflected in the structural and mechanical properties and consistency of products containing such suspensions in the formulation.

Study on Properties and Micro-Mechanism of RHB-SBS Composite-Modified Asphalt.

Rice husk biochar (RHB) is a renewable agricultural waste, and its fixation on pavements helps develop environmentally friendly, economical, and sustainable asphalt pavements. This paper used RHB to replace part of styrene-butadiene-styrene (SBS) for the composite modification study of matrix asphalt. The high- and low-temperature properties and microscopic mechanisms of the composite-modified asphalt were studied through a series of tests. The results showed that, compared with SBS-modified asphalt, the softening point, viscosity, complex shear modulus, stiffness modulus, and rutting factors of RHB-SBS composite-modified asphalt were improved. In contrast, the ductility and creep rate were slightly decreased, indicating an improvement in the high-temperature performance of composite-modified asphalt, but a slight decrease in its low-temperature performance. The process of RHB and SBS composite modification was mainly physical blending, with only a small number of chemical reactions, and no new functional groups were generated. The porous structure of RHB enables it to adhere better to the network crosslinked continuous phase system formed by SBS and matrix asphalt. This results in composite-modified asphalt with good high-temperature storage stability and rheological properties. Therefore, RHB-SBS composite-modified asphalt can be applied to high-temperature areas and rice-producing areas, and the optimal content of RHB is suggested to be 15%.

Effect of Various Dynamic Shear Rheometer Testing Methods on the Measured Rheological Properties of Bitumen

A 23 factorial design experiment was conducted to study the influence of pre-heating temperature (HT) for manufacturing sample, bonding temperature (BT) onto rheometer, and trimming state (Trim) of the sample on complex shear modulus (G*) and phase angle (δ) using a dynamic shear rheometer on unmodified bitumen of types 50/70, 70/100, and two 160/220 from various sources. In addition, the black diagram and 2S2P1D model were used to evaluate the viscoelastic properties of bitumens. Findings show that the G* is more sensitive to the changes than the δ. Additionally, it was found that the 8 mm parallel plate diameter had a higher sensitivity to the trimming state than the 25 mm. The tested factor HT generally did not have a statistically significant impact on the results of the tested materials, except for 160/220_I. At practically all the temperatures tested for 50/70 and 160/220_II, the G* dropped by increasing the factor BT from a lower to a higher value. The Trim:BT interaction has the greatest impact on all materials and temperatures on G*, except for 160/220 at lower temperatures. However, in the case of δ, the Trim:BT interaction has the most significant effects for 70/100 and 160/220_II. The black diagrams show no discernible differences, which may be a result of the limited range of changes made to the variables.

Microstructure and texture characterisation of friction stir welded CoCrNi and CoCrFeMnNi multi-principle element alloys

This work investigates the microstructure formed in friction stir welds of FCC alloys, focused on two multi-principal alloys: a CoCrFeMnNi high-entropy alloy (HEA) and a CoCrNi medium-entropy alloy (MEA). A commercial stainless steel AISI 304 is used for comparison. The largest nugget was formed in the MEA, while the smallest was formed in the HEA. Grain refinement occurs in the stirred zone in all welds. Discontinuous dynamic recrystallisation is the predominant restoration mechanism during friction stir welding of the three investigated alloys. A sharp decrement in the Σ3 boundary fraction occurs in the stirred zone of the AISI 304 and HEA welds, while comparable values with the base metal are found for the MEA weld. The peak in the maximum index of crystallographic texture is observed on the advancing side of the stirred zone of the AISI 304 weld. A strong < 001 > θ-fibre texture is formed in the advancing side of the nugget in the AISI 304 from a well-established {123}< 634 > S-type texture in the base metal. Multiple crystallographic texture components without specific fibres are identified in most regions of the welds, indicating the complex shear path history during friction stir welding.

Shear Damage Simulations of Rock Masses Containing Fissure-Holes Using an Improved SPH Method

Fissures and holes widely exist in rock mechanics engineering, and, at present, their failure mechanisms under complex compress and shear stress states have not been well recognized. In our work, a fracture mark, ξ, is introduced, and the kernel function of the smoothed-particle hydrodynamics (SPH) is then re-written, thus realizing the fracture modelling of the rock media. Then, the numerical models containing the fissures and holes are established, and their progressive failure processes under the compress and shear stress states are simulated, with the results showing that: (1) the improved SPH method can reflect the dynamic crack propagation processes of the rock masses, and the numerical results are in good agreement with the previous experimental results. Meanwhile, the improved SPH method can get rid of the traditional mesh re-division problems, which can be well-applied to rock failure modeling; (2) the hole shapes, fissure angles, fissure lengths, fissure numbers, and confining pressure all have great impacts on the final failure modes and peak strengths of the model; and (3) in practical engineering, the rock masses are in the 3D stress state, therefore, developing a high performance 3D SPH program and applying it to engineering in practice will be of great significance.

Kajian Penggunaan Carbon Black N990 sebagai Bahan Pengisi Kompon Karet Alam: Sifat Dinamik, Kestabilan Termal, dan Ketahanan Panas

The manufacture of vibration damping material from natural rubber (NR) required an increase in dynamic properties, thermal stability, and resistance to heat. Using the Carbon Black N990 as a filler in NR vulcanizates can potentially increase on these properties. This research aims to study the effect of using Carbon Black N990 on dynamic properties, thermal stability, and aging resistance to heat in NR vulcanizates. The dynamic properties of NR vulcanizates were determined by Rubber Process Analyzer (RPA), while the thermal stability properties were studied by TGA, and heat resistance was determined by the thermal aging test. The RPA test results showed that adding 50 phr Carbon Black N990 in the NR compound could increase the value of the complex shear modulus to 65%. Furthermore, the results of the TGA test showed that the thermal stability properties of unfilled NR vulcanizates were better than that of NR vulcanizates containing Carbon Black N990. Unfilled NR vulcanizates were heat stable up to 353oC, while NR vulcanizates containing 15, 30, and 50 parts per hundred rubber (phr) Carbon Black N990, respectively, were heat stable up to 348.1oC, 348oC, and 349oC. Based on the requirements of ISO 4632-1, it showed that the NR compound containing Carbon Black N990 has good heat resistance properties. The NR compound formula contains 30 phr Carbon Black N990 showing good dynamic properties and heat resistance in accordance with EN 15129 requirements so that it has the potential to be used as a vibration damping material for earthquake-resistant structures.

Ageing Evaluation of Foamed Polymer Modified Bitumen with Bio-Flux Additive

This paper presents the results of an analysis of the changes in the stiffness of asphalt binders modified with a bio-flux additive and subjected to the processes of foaming and short-term ageing. The purpose of the analyses was to determine changes in the rheological properties of asphalt binder as a result of technological processes characteristic of hot and warm mix asphalt technology. Three asphalt binders with similar penetration but varying degrees of polymer modification were tested: 50/70, 45/80-55 polymer-modified bitumen, and 45/80-80 highly modified bitumen. Tests were carried out on four groups of binders: original binders, foamed binders after 14 days of storage, non-foamed binders after Rolling Thin Film Oven Test (RTFOT) ageing, and foamed binders after 14 days of storage subjected to RTFOT ageing. The master curves of the complex shear modulus G* were analysed, and three indexes of binder stiffening were determined, characterising the investigated effects. The tests showed that some of the stiffening indices significantly depended on the degree of polymer modification and the content of the bio-flux additive. Moreover, it was found that the foaming process in the case of paving-grade bitumen and polymer-modified bitumen did not contribute to the additional stiffening of the binders.

Uniaxial prestress and waveguide effects on estimates of the complex shear modulus using magnetic resonance elastography in a transverse isotropic muscle phantom and excised muscle

Tensile prestress is inherent to the functional role of some biological tissues currently being studied using elastography, such as skeletal and cardiac muscle, arterial walls, and the cornea. Therefore, the impact of prestress coupled with waveguide effects due to small dimensions in one or more directions needs to be better understood. An experimental configuration is designed, fabricated and experimentally tested using magnetic resonance elastography (MRE). Cylindrically-shaped isotropic and transversely isotropic phantoms, as well as the excised cat soleus muscle are statically stretched along their main axis to specific prestrain levels while simultaneously conducting MRE measurements that enable synchronous motion-encoding in all three dimensions (polarization directions). In the case of the excised cat soleus, diffusion tensor imaging is also performed to enable a co-registered mapping of fiber structure. Guided by analytical models and numerical finite element simulations, experimental measurements are post-processed to obtain an estimate of the complex (viscoelastic) shear modulus as a function of prestress level and frequency of vibratory motion.

Biaxial prestress and waveguide effects on estimates of the complex shear modulus using optical elastography in a transverse isotropic cornea phantom

Tensile prestress is inherent to the functional role of some biological tissues currently being studied using elastography, such as skeletal and cardiac muscle, arterial walls, and the cornea. Therefore, the impact of prestress coupled with waveguide effects due to small dimensions in one or more directions needs to be better understood. An experimental configuration is designed, fabricated, and experimentally tested using optical elastography. Thin layered isotropic and transversely isotropic phantoms are statically stretched biaxially in plane while simultaneously conducting optical elastography measurements of out of plane motion. Guided by analytical models and numerical finite element simulations, experimental measurements are post-processed to obtain an estimate of the complex (viscoelastic) shear modulus as a function of prestress level and frequency of vibratory motion.

Rheological Performance of ZycoTherm/Nano-Silica Composite Modified Binders at High and Low Temperatures

This study aims to investigate the impact of control and warm mix binders modified with nano-silica on the asphalt binder functioning to resist rutting endurance and low-temperature cracking. The percentages of nano-silica employed in this research were 2%, 4%, and 6% of asphalt binder weight. The control and modified binders were evaluated by performing conventional and rheological tests. The rheological properties were examined by master curves, isochronal plots, multiple stress creep recovery (MSCR), Superpave rutting parameter, and bending beam rheometer. The outcomes implied that the performance of the asphalt binder (with or without ZycoTherm) improved when nano-silica was added concerning (G*/sin δ) parameter. The MSCR test demonstrated that the recovery (R %) of the control and warm mix binders improved whereas the non-recoverable creep compliance (Jnr) dropped, implying that nano-silica boosted the rutting potential. Moreover, it was observed at different temperatures that the values for the complex shear modulus increased when the phase angle values were reduced. Furthermore, at low temperatures, it is presumed that the performance of nano-silica modified asphalt binders will have minimal performance as opposed to the binders prepared with ZycoTherm, which prevents low-temperature cracking.

Shear strength of circular concrete-filled tube (CCFT) members using human-guided artificial intelligence approach

The complex shear behavior ofcircular concrete-filled tube (CCFT) members has been a challenge for an adequate design equation. Collapses due to shear failure are primarily seen in shear links, pile foundations, and coupling beams in composite shear walls. The current design provisions are based on limited experimental data, leading to very conservative expressions of shear strength. The recent advances in Artificial Intelligence (AI) technologies provided an opportunity to establish design models directly from the data with no need to postulate a mathematical expression. This study utilized three AI techniques alongside 141 experimental test results from the literature to overcome the complex behavior of the CCFT members by proposing reliable design equations/models. Namely, Gaussian Processing Regression (GPR), Gene Expression Programming (GEP) and Nonlinear Regression (NR) analysis. The predictor variables include axial loading, materials properties, section slenderness ratio and shear span ratio. This paper sheds light on the current data-based techniques in solving complex structural problems by addressing the noted AI methods and their application in predicting the shear capacity of CCFT members. It is concluded that the data-driven proposed model demonstrates remarkable accuracy in predicting shear capacity compared to the current design equations and can be used for routine design practice. The statistical validation resultsshow that among the proposed methods, GPR showed the highest efficiency in predicting the shear capacity of CCFT with an average error of 0.5%, whereas for GEP and NR, average errors are 1.26% and 1.09%, respectively.

Catalytic cracking of waste polyethylene into wax-based warm-mix agent for optimizing rheological and mechanical properties of asphalt composites

High value-added transformation of waste polyethylene with low recyclability and slow degradation in nature has become increasingly prevalent. To achieve the viscosity-reducing effect of asphalt, the wax-based warm-mix agents from waste polyethylene were synthesized via a catalytic cracking method, followed by the melt-mixing process of such agent and base asphalt. The effective relationship between chemical composition/structure of warm-mix agents and properties of asphalt composites was established, and the effects of synthesized warm-mix agents on viscoelasticity, rutting resistance and strain recovering ability of asphalt composites were systematically demonstrated. The results showed that the obtained asphalt composites containing 3 wt% warm-mix agents not only exhibited the significantly improved complex shear modulus, rutting factor and recovery percent, but also showed the decreased phase angle and non-recoverable creep compliance, suggesting excellent permanent deformation resistance and high elastic recovery; in addition, the low-temperature properties of resultant asphalt composites might be clearly changed. Moreover, the stiffening effect of the synthesized warm-mix agents was confirmed by the increased amounts of “bee structure” and glass-transition temperature. This work demonstrates that the catalytic cracking product of waste plastics is an economical yet efficient alternative for tuning structure and performance of asphalt.

Laboratory hydraulic fracturing in layered tight sandstones using acoustic emission monitoring

Understanding the propagating mechanism of complex fracture network is essential for optimizing the hydraulic fracturing design scheme. Laboratory hydraulic fracturing experiments were performed on three tight sandstone specimens with bedding plane perpendicular, oblique and parallel to the axial direction, respectively. Before hydraulic fracturing, three specimens were first loaded close to the critical stress state under 22.5 MPa confining pressure. The entire hydraulic fracturing process was monitored by acoustic emission (AE) and ultrasonic measurement. The experimental results show that the hydraulic fracturing behaviors were significantly influenced by bedding structure and water infiltration. The bedding plane plays an important role on breakdown pressure, distribution characteristics of AE activities and hydraulic fracture networks. The bedding-oblique specimen exhibits lower breakdown pressure than those of the bedding-parallel and bedding-perpendicular specimens. AE activities in the bedding-oblique specimen is characterized by lower b-value, while higher b-value is found in other two specimens. X-ray computed tomography images of the broken specimens show an excellent agreement between AE hypocenters and macroscopic fractures, indicating geometrical morphology of macroscopic fractures is closely related to the bedding plane and well imaged by AE hypocenters. A bedding-parallel shear fault formed in the bedding-oblique specimen. Complex shear fault linking several bedding-parallel echelon arrays or branches formed in the bedding-parallel and bedding-perpendicular specimens. Water infiltration affects the hydraulic fracturing behaviors by inducing AE events initiate at transition region of wet-dry boundary around the central borehole. In view of the formation of fracture network and the risk of induced seismicity, the influence of bedding structure and water infiltration should be taken into consideration under given in-situ stress regime during the hydraulic fracturing design scheme.

A time-temperature-ageing shift model for bitumen and asphalt mixtures based on free volume theory

ABSTRACT This paper aims to develop a general form of the time-temperature-ageing shift model for bituminous materials based on free volume theory and validate its application in the Finite Element (FE) modelling for predicting aged asphalt mixtures’ mechanical responses. The frequency sweep, dynamic modulus, and Fourier Transform Infrared Spectroscopy (FTIR) tests were used to validate the proposed time-temperature-ageing shift model. A generalised Maxwell model incorporating the proposed shift model of asphalt mixtures was used to predict the mechanical responses of aged asphalt mixtures using FE modelling, verified via laboratory cyclic load tests. Results indicate that the time-temperature-ageing shift function can model the complex shear modulus and dynamic modulus master curves of bituminous materials, addressing the modulus dependency of temperature and ageing. Temperature dominates the modulus change of bituminous materials in the ageing process. The coefficients of the time-temperature-ageing shift model have clear physical meanings and can potentially quantify the effects of asphalt mixtures’ air voids on their temperature and ageing susceptibilities. The time-temperature-ageing shift model can be incorporated into the constitutive relations of the FE model to effectively couple and efficiently predict the effects of temperature and ageing on the mechanical responses of aged asphalt mixtures.