Micro-mechanical modelling of low temperature-induced micro-damage initiation in asphalt concrete based on cohesive zone model

Bekele, Abiy; Balieu, Romain; Jelagin, Denis; Rydén, Nils; Gudmarsson, Anders

doi:10.1016/j.conbuildmat.2021.122971

Cited by 17 publications

(3 citation statements)

References 22 publications

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“…The initial flexural tensile stiffness modulus ( S 0 ) is closely related to the determination of the fatigue life of asphalt mixture specimens. In this paper, the stiffness modulus of the 100th loading cycle is uniformly set as the initial stiffness modulus of the test specimens [ 40 ]. The experimental results of the initial flexural tensile stiffness modulus of four types of asphalt mixtures are shown in Figure 7 .…”

Section: Resultsmentioning

confidence: 99%

Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture

et al. 2022

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The fatigue resistance of asphalt mixture is an important indicator to evaluate the durability of asphalt pavement. In order to improve the fatigue properties of asphalt mixture, diatomite and environmental basalt fiber were added. Four types of asphalt mixtures, ordinary asphalt mixture (AM), diatomite modified asphalt mixture (DAM), basalt fiber modified asphalt mixture (BFAM) and diatomite/basalt fiber composite modified asphalt mixture (DBFAM), were chosen, whose optimum asphalt–aggregate ratio, optimum content of diatomite and optimum content of basalt fiber could be determined by Marshall test and response surface methodology (RSM). The multi-functional pneumatic servo Cooper test machine was carried out by a four-point bending fatigue test. Through the comparative analysis of flexural-tensile stiffness modulus (S), initial stiffness modulus(S0), residual stiffness modulus ratio, lag angle (ϕ) and cumulative dissipation energy (ECD), the fatigue resistance of asphalt mixture can be effectively improved by adding diatomite and basalt fiber. Grey correlation analysis was also used to analyze the degree of correlation between the fatigue life and the influencing factors such as VV, VMA, VFA, OAC, S, and ECD. The analysis results indicate that ECD has the greatest impact on the fatigue life of the asphalt mixture.

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Section: Resultsmentioning

confidence: 99%

Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture

et al. 2022

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“…The thermal excursions, with alternate heating and cooling, made the asphalt more elastic and deformable in hot weather and more rigid and brittle in cold weather [75][76][77]. Over time, these processes promoted the formation of cracks [78,79] and both snow and rain precipitations lead to a further worsening of the concrete slabs. The water, due to the continuous passage of vehicles, increased structural failure favouring the formation of holes.…”

Section: Discussionmentioning

confidence: 99%

Case study on the mineralogical and petrophysical analysis of reinforced concrete slabs of a highway viaduct of the S.G.C. Orte-Ravenna

et al. 2021

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For the maintenance of the safety and security of people traveling on the road, renovation of the reinforced concrete is necessary, especially for bridge or viaduct slabs. Being able to quantify the degradation of slabs and propose methodologies for its retrofit or maintenance is crucial not only in the mineralogical-engineering field but also for socio-economic implications. In this study, samples of deck slabs of a viaduct from the highway E45 near the locality of Bagno di Romagna (Emilia Romagna, north of Italy) were subjected to a testing program to evaluate mechanical and mineralogical parameters through thermographic analyses, compression, and Ultrasonic Pulse Velocity tests and morphological observation. The analyses allow to better recognize the damage of the reinforced concrete samples and they have shown that the cause of the detachment of the asphalt has mainly a natural origin, due to temperature variations and precipitation, with a secondary cause in the anthropogenic impact. The work aims to understand the relationships between the structure of the aggregates and the characteristics of concrete to understand the development of degradation. This knowledge could be used to prevent future damages to the highways. Article Highlights• Concrete slabs analysed provided information about the relation between damage level, mechanical behaviour, size and distribution of aggregates.• Thermographic analyses were useful to understand how deep the damage was in the slabs and to detect any detachment of the asphalt. • Compressive tests, through the failure load value, shown that the ultimate strength level decreased due to formation of microcracks.

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“…In order to gain further insight into the test sensitivity to the experimental parameters finite element (FE) modeling is employed. Thermomechanical FE modeling has been used in a number of recent studies to investigate low-temperature performance of bituminous materials, as well as to complement and validate different test set-ups [23][24][25][26][27].…”

Section: Methodsmentioning

confidence: 99%

Advanced testing and characterization of low-temperature cracking in bitumen and mastic

Shabani,

Jelagin,

Partl

2024

Mater Struct

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Low-temperature cracking is one of the most common failures in asphalt pavements, especially in cold regions. Accordingly, considerable amount of research has been performed in order to understand the low-temperature cracking mechanisms and to propose test methods for characterizing and determining cracking performance of bitumen and asphalt mixtures under freezing conditions. The existing test methods, however, require expensive equipment and skilled technicians; they are thus not well suited for routine tests. As a contribution to mitigate this situation, this study intends to investigate experimentally and characterize numerically the low-temperature cracking behavior of bitumen and mastic materials using a refined thermal cracking test method. The proposed method, the annular restrained cold temperature induced cracking (ARCTIC) test, allows to determine the low-temperature cracking properties of the mastic and bitumen with a relatively simple setup. In this paper, finite element (FE) modeling is used for evaluating the effect of test parameters on the temperature, stress and strain gradients induced in the specimen during the test. The ARCTIC test is employed to measure cracking temperatures of two bitumen and two mastic materials. The measurements repeatability is examined and the effect of bitumen type on the thermal cracking potential of bitumen and mastic is evaluated. FE modeling is employed to examine the effect of thermomechanical parameters on thermal cracking performance of the materials and to back-calculate fracture stress and strain from measurements. The results highlight the potential of the proposed test and analysis method for evaluation of low-temperature cracking in bitumen and asphalt mastic.

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Micro-mechanical modelling of low temperature-induced micro-damage initiation in asphalt concrete based on cohesive zone model

Cited by 17 publications

References 22 publications

Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture

Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture

Case study on the mineralogical and petrophysical analysis of reinforced concrete slabs of a highway viaduct of the S.G.C. Orte-Ravenna

Advanced testing and characterization of low-temperature cracking in bitumen and mastic

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