Numerical investigation of thermal parameter characteristics of the airfield runway adherent layer in permafrost region of Northeast China

Liu, Chaojia; Chong, Xiaolei; Yao, Zhihua; Wei, Yazhi; Zhang, Jichao; Li, Yao

doi:10.1016/j.csite.2022.101985

Cited by 5 publications

(3 citation statements)

References 55 publications

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“…However, the low phase angle values indicate low viscosity of the asphalt binder due to increase in temperature. Liu et al, (2022) investigated the effects of annual range temperature on the layer thickness, and annual average ground temperature. The thermal parameters of the asphalt concrete layer were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Thermal Behavior of the Viscoelastic Properties of Asphalt Concrete

Sarsam

2022

bioex

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The viscoelastic properties of asphalt concrete are susceptible to the variation in the pavement temperature. In the present work, asphalt concrete beam specimens were prepared at optimum binder content and tested under repeated flexural stresses for fatigue life. Three testing temperature were implemented (5, 20, and 30) ℃. The variation in the phase angle, dissipated energy, flexural stiffness, and permanent deformation due to the testing temperatures were monitored and modeled. It was concluded that the viscoelastic properties of asphalt concrete are highly sensitive to the variation in testing temperature. The phase angle and the permanent deformation increases sharply as the testing temperature rises. However, the dissipated energy and the flexural stiffness declines as the testing temperature rise. Mathematical models were obtained which can be implemented in identifying the thermal behavior of the viscoelastic properties of asphalt concrete.

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Section: Introductionmentioning

confidence: 99%

Modeling the Thermal Behavior of the Viscoelastic Properties of Asphalt Concrete

Sarsam

2022

bioex

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“…Therefore, they should be assigned different values at different MAGTs and altitudes. Meanwhile, most studies use a linear ground surface temperature increase rate to evaluate the effects of climate change induced temperature increase on permafrost warming and thawing [29,41]. Therefore, the predicted values of climate warming rates used in this study do not affect the regularity of the results.…”

Section: Discussionmentioning

confidence: 99%

Numerical Simulation of Heat Transfer of Porous Rock Layers in Cold Sandy Regions

Qiu,

Huang,

Han

et al. 2023

Atmosphere

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The heat transfer characteristics of porous rock layers (PRLs) have significant seasonal differences. This feature has been used to protect the permafrost subgrade under highways and railways from degeneration. However, in cold sandy environments, the transformation law of heat transfer characteristics of PRLs on account of climate warming and aeolian sand filling needs to be solved. This work developed a coupled heat transfer model for the soil–PRL system aimed at analyzing the convective heat transfer process and mechanism of a closed PRL. Furthermore, the impact of climate warming and sand filling on the cooling performance of the PRL under different mean annual air temperatures (MAATs) of −3.5, −4.5, and −5.5 °C was quantified. The numerical results indicated that the natural convection of the closed PRL occurred only in winter, and the effective convective height of the rock layer decreased with the sand-filling thickness. As the thickness of sand filling increased, the critical temperature difference for the occurrence of natural convection increased, accompanied by decreases in the Rayleigh number, the duration, and intensity of natural convection. When the sand-filling thickness exceeded 80 cm, natural convection would not occur in the PRL. Under a warming scenario of 0.052 °C·a−1, the cooling performance of the PRL could offset the adverse impact of climate warming and raise the permafrost table in the first 20 years. Moreover, the closed PRL can be more effective in permafrost regions with colder MAATs. For cold sandy permafrost zones, sand-control measures should be taken to maintain the long-term cooling performance of the PRL. This study is of great significance in guiding porous rock embankment design and road maintenance along the Qinghai–Tibetan Railway.

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“…The impact of the annual variations of temperature and the thermal parameters on asphalt concrete performance has been investigated by Liu et al, (2022), [1]. The testing results declared that the temperature fields obtained through the experimental data on the asphalt concrete pavement may be compared with its numerical calculation results, it was addressed that the test results are in close agreement.…”

Section: Introductionmentioning

confidence: 99%

The Role of Dissipated Energy and Stiffness in Enhancing the Fatigue Life of Asphalt Concrete under Environmental Influence

Sarsam

2023

CEBEL

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Variation of environmental conditions exhibits various modes of failure of asphalt concrete pavement. Under cold environment, the flexible pavement experience cracking and disintegration, while under hot environment, the pavement practices rutting. Both environmental conditions can enhance the fatigue life of the flexible pavement. In the present work, the role of the change in the dissipated energy, and flexural stiffness of asphalt concrete on its fatigue life under environmental influence have been investigated. Asphalt concrete mixtures were prepared with its optimum asphalt binder requirements, and then compacted into a slab mold by laboratory roller to a target density. Beam specimens were obtained from the prepared slab samples and tested for fatigue life using three levels of constant strain of (750, 400, and 250) microstrain under dynamic flexural stresses. The specimens were tested at (5, 20, and 30) ℃ environment levels. It was noticed that specimens practicing cold environment exhibit shorter fatigue life as compared with those tested at hot environment. However, the flexural stiffness of the beam specimens decline as the testing temperature rises. Such behavior was further supported with the variation in the dissipated energy among testing environment. It was concluded that higher testing environment declines the flexural stiffness, increases the fatigue life, and changes the mode of failure of asphalt concrete from brittle to plastic mode.

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Numerical investigation of thermal parameter characteristics of the airfield runway adherent layer in permafrost region of Northeast China

Cited by 5 publications

References 55 publications

Modeling the Thermal Behavior of the Viscoelastic Properties of Asphalt Concrete

Modeling the Thermal Behavior of the Viscoelastic Properties of Asphalt Concrete

Numerical Simulation of Heat Transfer of Porous Rock Layers in Cold Sandy Regions

The Role of Dissipated Energy and Stiffness in Enhancing the Fatigue Life of Asphalt Concrete under Environmental Influence

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