Damage evolution of asphalt mixture under freeze-thaw cyclic loading from a mechanical perspective

Zhang, Zeyu; Liu, Quan; Wu, Qi; Xu, Huining; Liu, Pengfei; Oeser, Markus

doi:10.1016/j.ijfatigue.2020.105923

Cited by 40 publications

(8 citation statements)

References 42 publications

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“…Because the mechanical properties of asphalt mixtures can only indirectly evaluate the effects of freeze–thaw damage, some scholars have tried to establish mechanical models to evaluate and predict freeze–thaw damage [ 26 ]. For example, based on the continuum damage theory, a freeze–thaw damage evolution model was established, and the predicted results agree well with the experimental data [ 27 ]. Finite element simulation was used with a variety of mechanical indicators, including fracture energy to evaluate the degree of freeze–thaw damage in combination [ 28 ].…”

Section: Introductionmentioning

confidence: 91%

“…CT images were used to find the large voids and small voids were negatively and positively correlated with tensile strength, respectively [ 36 ]. Based on the features of connected voids in CT 2D images, a damage model was established and found that connected voids contributed to the increase in the number of voids [ 27 ]. Information entropy was used to describe the freeze–thaw damage stage in CT images [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Jing

Liu

2022

Materials

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Freeze–thaw cycle is one of the main distresses of asphalt pavement, and the law of freeze–thaw damage has always been an important topic. In this paper, X-ray computed tomography (CT) of asphalt mixture before and after freezing and thawing was carried out, and its two-dimensional (2D) digital image was recognized. Firstly, the eigenvalues of internal voids of asphalt mixture are extracted. Then the distribution of internal voids was analyzed. Finally, the evolution law of internal voids was summarized. The research results show that the characteristic mean value of the 9th cycle is the irreversible limit of freeze–thaw damage, and the non-resilience after the large void area increases is the fundamental reason for the accumulation of freeze–thaw damage. The source of void damage shifts from large voids to small voids, and the middle-stage is a critical stage of freeze–thaw damage. This work quantitatively evaluates the internal freeze–thaw damage process of asphalt mixture, and a morphological theory of the evolution of void damage based on an equivalent ellipse is proposed, which is helpful for better understanding the freezing–thawing damage law of asphalt pavement.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Jing

Liu

2022

Materials

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“…When the temperature drops sharply and reaches the freezing point, the moisture begins to transform from liquid to solid, and the volume becomes larger. Such frost heaving stress not only expands the volume and number of voids [7,8], but also causes irreversible damage to asphalt mixture [9]. When the temperature rises, the moisture will be converted into liquid state.…”

Section: Introductionmentioning

confidence: 99%

Study on flexural properties of coal gangue powder asphalt mixture under freeze-thaw cycles

Wu¹,

Zhao²,

Cui³

et al. 2022

Mater. Res. Express

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In order to study the influence of freeze-thaw cycle on the flexural performance of asphalt pavement, semi-circular flexural test (SCB) is carried out. Coal gangue powder (accounting for 0%, 25%, 50%, 75% and 100% by weight of ore powder) is used to replace ore powder to improve the freeze-thaw resistance of asphalt.According to the test data, the load-displacement curve is drawn, the ultimate tensile stress(σt) is studied, and the variation law of different coal gangue powder replacement rates under different freeze-thaw cycles (0, 2, 4, and 6 times) is analyzed by ultimate tensile stress. The test results show that the best replacement rate of coal gangue powder is 50%, and σt decreases with the increase of freeze-thaw cycles, so adding coal gangue powder can reduce the influence of freeze-thaw cycles on the bending performance of asphalt pavement. By analyzing the load-displacement curve, energy indexes such as WD(total work from initial failure to complete failure), WU(energy dissipation from initial failure to complete failure), WS(work from initial failure to specimen failure) and η are obtained. In the freeze-thaw cycle, with the increase of cycle times, the energy consumption of WD, WU and WS decreases, which aggravates the damage of asphalt mixture and reduces the flexural capacity of specimens. Among them, six freeze-thaw cycles have the lowest flexural capacity of specimens, indicating that freeze-thaw damage directly affects the flexural performance of asphalt mixture.

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“…Moreover, corrosion occurs even at relatively low humidity levels due to the hygroscopic properties of salts [ 7 ]. Experimental simulations of drying–wetting and freezing–thawing cycles in [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ] showed the effect of a salt medium on an asphalt pavement with an increase in the drying rate of the bitumen binder. For example, after 15 cycles of drying–moistening with 5% and 10% NaCl solutions, the modulus of hardness of the asphalt-limestone pavement increase to 20.2% and 30.3%, respectively, and after 15 freezing–thawing cycles with similar solutions—up to 28.4% and 38.2% ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

A Mini-Review on Recent Developments in Anti-Icing Methods

et al. 2021

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An aggressive impact of the formed ice on the surface of man-made objects can ultimately lead to serious consequences in their work. When icing occurs, the quality and characteristics of equipment, instruments, and building structures deteriorate, which affects the durability of their use. Delays in the adoption of measures against icing endanger the safety of air travel and road traffic. Various methods have been developed to combat de-icing, such as mechanical de-icing, the use of salts, the application of a hydrophobic coating to the surfaces, ultrasonic treatment and electric heating. In this review, we summarize the recent advances in the field of anti-icing and analyze the role of various additives and their operating mechanisms.

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Damage evolution of asphalt mixture under freeze-thaw cyclic loading from a mechanical perspective

Cited by 40 publications

References 42 publications

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Effects of Freeze–Thaw Cycles on the Internal Voids Structure of Asphalt Mixtures

Study on flexural properties of coal gangue powder asphalt mixture under freeze-thaw cycles

A Mini-Review on Recent Developments in Anti-Icing Methods

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