Modeling of Temperature Field in Flexible Pavement

Teltayev, Bagdat; Aitbayev, Koblanbek

doi:10.1007/s40098-014-0122-6

Cited by 16 publications

(9 citation statements)

References 2 publications

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“…When asphalt concrete is in contact with air, there are two kinds of heat exchange modes: convection and radiation. The boundary conditions are shown in Equation (6) [23].…”

Section: Estimation Of Steam Pressurementioning

confidence: 99%

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Blistering Mechanism Analysis of Hydraulic Asphalt Concrete Facing

et al. 2019

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Two years after the Zhanghewan Pumped-Storage Power Station was put into operation, more than 500 blisters appeared in the asphalt concrete facing of the upper reservoir, and nearly half of them ruptured at the surface. The blistering mechanism of the asphalt concrete facing was studied in this paper. Through on-site inspection and coring inspection, it was found that the blistering was caused by the vapor pressure formed by the water enclosed in the middle of the impervious layer during high temperatures. Numerical analysis showed that the temperature 5 cm below the surface could reach 50–60 °C. Through numerical analysis and model tests, the internal water at this temperature may form a vapor pressure of 20 kPa. Finally, the blister size of the asphalt concrete facing at this temperature and pressure was studied with a model test. The possible sources of moisture inside the impervious layer were also analyzed through a core test, which found that moisture was most likely to be introduced by water spraying during rolling.

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“…When asphalt concrete is in contact with air, there are two kinds of heat exchange modes: convection and radiation. The boundary conditions are shown in Equation (6) [23].…”

Section: Estimation Of Steam Pressurementioning

confidence: 99%

“…Thermal parameters used for the calculation[23,24] Temperature curve and solar radiation curve of a certain day in Shijiazhuang City[25] …”

mentioning

confidence: 99%

Blistering Mechanism Analysis of Hydraulic Asphalt Concrete Facing

et al. 2019

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“…Pavement surface in the city, especially asphalt pavement, has changed the original thermal properties of the natural ground surface. The temperature of asphalt pavement surface rises rapidly under solar radiation to 65-70°C, a temperature that is significantly higher than that of natural ground surface [69,70].…”

Section: Engineering Applications and Challengesmentioning

confidence: 95%

A review of eco-friendly functional road materials

Jian

Huang

Sha

2018

Construction and Building Materials

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Extensive studies on traditional and novel engineering materials and the increasing 8 demands by growing traffic have led to tremendous changes of the function of roads. Roads, as an 9 important part of the human living environment, have evolved from structures that were designed and built for passing vehicles, to ecological assets with significant economic importance. In addition to structural stability and durability, functions such as noise reduction, urban heat island mitigation, de-icing and exhaust gas absorption, are also expected. This study focused on state-of-the-art research on the performance, applications and challenges of six environment-friendly functional road materials, namely the permeable asphalt concrete, noise-reducing pavement materials, low heat-absorbing pavement materials, exhaust gas-decomposing pavement materials, de-icing pavement materials, and energy harvesting pavement materials. With this study, we aim to provide references to the latest relevant literatures of the design and development of environment-friendly functional pavement, and promote innovation in materials science and pavement design principles. For this purpose, this review compiled extensive knowledge in modern road construction and related disciplines, in order to promote the development of modern pavement engineering technologies.

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“…Therefore, it is useful to determine the temperature gradient underneath the road surface. Previous work has focused largely on the temperature gradient for the full depth of road [36,37]. However, the temperature gradient within road surface layer, especially the depth from 0 mm to 100 mm, is more valuable for pavement thermoelectric generation technology due to the presence of greater and longer temperature difference [38,39].…”

Section: Temperature Gradient Within Road Pavementmentioning

confidence: 99%

Energy harvesting from asphalt pavement using thermoelectric technology

et al. 2017

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Nowadays, energy harvesting from road has become a research hotspot. The power generation system within asphalt pavement based on thermoelectric technology was studied in this paper. The characteristics of temperature difference between the pavement and ambient air, as well as the temperature gradient within road surface were investigated by collecting data on-site in different seasons. Based on this, a novel set of road thermoelectric generator system (RTEGS) was developed, which can generate electricity when there is a temperature difference between road surface and ambient air. In addition, a RTEGS prototype was fabricated to verify the energy generation capacity based on indoor and outdoor tests. Results showed that the output voltage of RTEGS was about 0.4 V by asphalt mixture slab (300 mm × 300 mm by size), when the temperature difference between road surface and ambient air was 15 o C in winter. While in summer, the output voltage was about 0.6 V to 0.7 V, with a temperature difference of 25 o C to 30 o C. This means that some 160 kWh of energy can be obtained in 8 hours from a road of 1 km in length and 10 m in width. For asphalt pavement in tropical and subtropical regions, the large temperature difference would be more suitable for RTEGS. The findings and research experiments from this study will provide a good starting point and reference for the development and application of pavement thermoelectric technology.

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Modeling of Temperature Field in Flexible Pavement

Cited by 16 publications

References 2 publications

Blistering Mechanism Analysis of Hydraulic Asphalt Concrete Facing

Blistering Mechanism Analysis of Hydraulic Asphalt Concrete Facing

A review of eco-friendly functional road materials

Energy harvesting from asphalt pavement using thermoelectric technology

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