Multi-scale damage characterization of asphalt mixture subject to freeze-thaw cycles

Xu, Gang; Yu, Yunhong; Cai, Degou; Xie, Guanyu; Chen, Xianhua; Yang, Jun

doi:10.1016/j.conbuildmat.2019.117947

Cited by 48 publications

(8 citation statements)

References 26 publications

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“…ere is a big difference between viscoelastic characteristics of asphalt concrete and cement concrete elastic property. Some researches have been conducted on the F-T performance of asphalt mixtures [25].…”

Section: F-t Cycle Testmentioning

confidence: 99%

“…e exponential model is chosen to fit the flexural tensile characteristics variation in this paper. e formula used is as follows [24,25]:…”

Section: Exponential Model Fittingmentioning

confidence: 99%

“…e least-square method has been applied to parameter estimation, due to the ε subjects to normal distribution; Chi-square has been used to assess the goodness of fit (GOF) of the exponential model. e equation is as follows [24,25]:…”

Section: Exponential Model Fittingmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of Freeze-Thaw Cycles Impact on Flexural Tensile Characteristics of Asphalt Mixture in Cold Regions

Duojie

et al. 2021

Mathematical Problems in Engineering

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Low average temperature, large temperature difference, and continual freeze-thaw cycles have significant impacts on mechanical property of asphalt pavement. Bending test was applied to illustrate the mixtures’ flexural tensile properties under freeze-thaw (F-T) conditions. Experiment results showed that the flexural tensile strength and strain declined as F-T cycles increased; the deterioration of flexural tensile properties decreased sharply during initial F-T cycles but turned smooth after 15–21 F-T cycles. ANOVA showed that F-T cycles, asphalt-aggregate ratio, and gradation had obvious influence on flexural tensile characteristics. Flexural characteristics of AC-13 behaved better than the other gradations. It turned out that the mixtures’ low-temperature bending characteristics were improved when 5.5% optimum asphalt-aggregation ratio or slightly larger AC-13 gradation was applied.

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Section: F-t Cycle Testmentioning

confidence: 99%

“…e exponential model is chosen to fit the flexural tensile characteristics variation in this paper. e formula used is as follows [24,25]:…”

Section: Exponential Model Fittingmentioning

confidence: 99%

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Assessment of Freeze-Thaw Cycles Impact on Flexural Tensile Characteristics of Asphalt Mixture in Cold Regions

Duojie

et al. 2021

Mathematical Problems in Engineering

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“…Considering that the internal structure evolution of asphalt mixture by freeze-damage occurs in three dimensions and without a determined direction, it is necessary to use three-dimensional parameters to characterize the internal structure evolution of asphalt mixture during freeze-thaw cycles. In this paper, the internal structure evolution of samples were characterized by their air void content, air void number, and average void diameter in 3D via image processing, as shown in Figure 3; more details can be found in my previous research [24]. For a precise characterization of the internal structure, samples were scanned before and after freezethaw exposure to evaluate the changes in their internal structure with a vertical interval of 0.1 mm along the height of the specimens and with a system resolution of 0.05 mm/pixel.…”

Section: X-ray Scanning and Digital Image Processingmentioning

confidence: 99%

Characterization of Three-Dimensional Internal Structure Evolution in Asphalt Mixtures during Freeze–Thaw Cycles

Chen

Cai

et al. 2021

Applied Sciences

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This paper aims to characterize the three-dimensional (3D) internal structure evolution of asphalt mixtures under freeze–thaw cycles. Asphalt mixtures with three levels of design void content (3%, 5%, and 7%) were prepared in the laboratory. Subsequently, X-ray computed tomography (CT) tests were conducted to capture two-dimensional (2D) images of the internal structure of samples before and after freeze–thaw testing. A set of image processing techniques for reconstructing 3D images of the internal structure were utilized to extract the internal structure properties, which were then used to analyze the changes in the air void distributions and to evaluate the internal structure evolution under freeze–thaw cycles. 3D images reconstructed from X-ray CT images illustrated a dramatic degradation in the internal structure after cyclic freeze–thaw exposure. The change in internal structure occurs mainly in three ways: (1) expansion of existing individual voids, (2) combination of two separated air voids, and (3) generation of new voids. In addition, the parametric analysis of the three-dimensional reconstructed voids revealed that the asphalt mixture void ratio increased with the number of freeze–thaw cycles, while the larger the initial void content, the more pronounced the increase in the specimens. Therefore, asphalt mixture freeze–thaw resistance should be optimized in relation to the design void content.

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“…e damage mechanism of the asphalt mixture under freeze-thaw cycle has been obtained [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Research of Method for Improving Antifreeze‐Thaw Performance Based on Asphalt Mixture Freeze‐Thaw Damage Development Process

Sun

Deng

et al. 2020

Advances in Civil Engineering

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To improve the antifreeze-thaw performance of asphalt pavement in the seasonal freezing regions, the temperature and the time of freeze-thaw test were redesigned based on the climatic characteristics of the regions, and the splitting tensile strength tests were carried out to determine the low-temperature performance of the asphalt mixture under the influence of the gradation and the asphalt-aggregate ratio. A mathematical model was built to investigate the freeze-thaw damage law. According to the test results of splitting tensile strength of the asphalt mixture under freeze-thaw cycles, the probabilistic damage variable of the asphalt mixture was redefined and a physical probability model was built to analyse the freeze-thaw damage. Based on the freeze-thaw damage development process and the mechanism of the asphalt mixture, the effective measures to improve the antifreeze-thaw performance were provided and demonstrated through the correlations among the damage parameters (the shape parameter α, the scale factor λ, and the gradient factor ν) and the freeze-thaw resistance of the asphalt mixture. The test results showed that the splitting tensile strength decreased with the increase of the number of the freeze-thaw cycles. With the same gradation, the splitting freeze-thaw damage degree of the asphalt mixture with 5.8% asphalt-aggregate ratio is about 6% less than others after the 18th freeze-thaw cycle. The freeze-thaw resistance increases with the asphalt-aggregate ratio. With the same asphalt-aggregate ratio, the splitting freeze-thaw damage degree of S-grade mixtures is about 11.8% higher than that of Z-grade mixtures. S-grade mixtures have positive effects on the freeze-thaw resistance. The results suggest new measures for further investigation on the design and maintenance of the asphalt mixture in the seasonal freezing regions.

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Multi-scale damage characterization of asphalt mixture subject to freeze-thaw cycles

Cited by 48 publications

References 26 publications

Assessment of Freeze-Thaw Cycles Impact on Flexural Tensile Characteristics of Asphalt Mixture in Cold Regions

Assessment of Freeze-Thaw Cycles Impact on Flexural Tensile Characteristics of Asphalt Mixture in Cold Regions

Characterization of Three-Dimensional Internal Structure Evolution in Asphalt Mixtures during Freeze–Thaw Cycles

Research of Method for Improving Antifreeze‐Thaw Performance Based on Asphalt Mixture Freeze‐Thaw Damage Development Process

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