Development and performance research of new sensitive materials for microwave deicing pavement at different frequencies

Ding, LongTing; Wang, Xuancang; Cui, Xuzhong; Zhang, Mengyuan; Chen, Bing

doi:10.1016/j.coldregions.2020.103176

Cited by 21 publications

(5 citation statements)

References 18 publications

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“…Table 4 shows the highest surface temperatures of specimens in groups 0#, 1#, 2# and 3# after microwave deicing. From Table 4, the highest surface temperatures of specimens in groups 2# and 3# could reach over 170 • C and 200 • C. The asphalt will soften under high temperatures, which causes damage to the pavement under the load of a microwave deicing vehicle [12,15]. In summary, the UML has an excessive temperature difference that can not only reduce the microwave deicing efficiency but also cause damage to the asphalt pavement.…”

Section: Effect Of Sic Particle Size On Deicing Timementioning

confidence: 99%

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An Ultra-Thin, Microwave-Absorbing Wear Layer for Pavement Deicing

2023

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Microwave heating is widely employed in pavement deicing. However, it is difficult to improve the deicing efficiency because only a small part of the microwave energy is used and most of it is wasted. To improve the utilization efficiency of microwave energy and the deicing efficiency, we used silicon carbide (SiC)–replaced aggregates in asphalt mixtures to prepare an ultra-thin, microwave-absorbing wear layer (UML). The SiC particle size, SiC content, oil–stone ratio and thickness of the UML were determined. The effect of the UML on energy saving and material reduction was also evaluated. Results show that only a 10 mm UML was needed to melt a 2 mm ice layer within 52 s at −20 °C and rated power. In addition, the minimum layer thickness to meet the specification requirement (≥2000 με) of asphalt pavement was also 10 mm. SiC with larger particle sizes increased the temperature rise rate but decreased the temperature uniformity, instead increasing the deicing time. The deicing time of a UML with SiC particle size less than 2.36 mm was 35 s shorter than that of a UML with SiC particle size greater than 2.36 mm. Furthermore, more SiC content in the UML resulted in a higher temperature rise rate and less deicing time. The temperature rise rate and deicing time of the UML with 20% SiC were 4.4 times and 44% of those of the control group. When the target void ratio was 6%, the optimum oil–stone ratio of UML was 7.4%, and it had good road performance. Compared to overall heating, the UML saved 75% of power and SiC material under the same heating efficiency. Therefore, the UML reduces microwave deicing time and saves energy and material.

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Section: Effect Of Sic Particle Size On Deicing Timementioning

confidence: 99%

“…Scholars often improve the microwave deicing efficiency of pavement by adding microwave-absorbing materials [11,12]. According to the type of loss, the incorporated microwave-absorbing materials can be divided into magnetic loss materials, such as magnetite, and dielectric loss materials, such as activated carbon powder (ACP) [13,14].…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Thin, Microwave-Absorbing Wear Layer for Pavement Deicing

2023

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“…Gao et al (2019) utilized steel wool fiber and assessed the heating uniformity and sustainability of the asphalt mixture under −5 and −10 °C and offered an optimal content. Ding et al (2020) conducted a microwave heating test to establish the effectiveness of a ferric aluminum mixture (Al 2 O 3 :Fe 3 O 4 = 1:1) and hydroxy iron powder in enhancing microwave deicing The processing flow AHP and improved AHP.…”

Section: Introduction 1backgroundmentioning

confidence: 99%

A comprehensive evaluation of asphalt concrete modified with ACP based on improved AHP and radar chart method

Bi,

Zhang

2024

Front. Energy Res.

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Microwave heating, as an efficient and environmentally friendly heating technology, is used in solving rapid deicing issues of asphalt pavement. In this study, activated carbon powder (ACP) was adopted to partly replace mineral powder and improve the microwave heating efficiency of asphalt concrete. Some tests of key indexes about deicing, microwave heating, asphalt concrete and asphalt mastic were conducted in laboratory. In order to comprehensively compare and analyze the performance of asphalt concrete at different replacements and recommend the best type of asphalt concrete with laboratory data, an advanced data processing and mathematical model was established based on improved Analytic Hierarchy Process (AHP) and radar chart method. The results show that the fi representing the comprehensive performance of each type of asphalt concrete can be ranked as f6>f5>f4>f3>f2>f1. Therefore, it can be easily recommended that the type of asphalt concrete that meets the expected requirements is that with 100% ACP replacement amount. Additionally, the established model has proved feasible and effective through the application of this research. Finally, this research’s process and results can provide a new idea and reference for resolution of similar problems in the future.

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“…In recent years, materials that strongly absorb microwaves have been added to or have replaced the materials in roads to enhance the ability to deice these roads with microwaves [1][2][3][4][5][6]. Among these materials, layered pavement combining microwaveabsorbent materials and structures has shown excellent deicing performance [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Microwave Deicing Capacity of Cement Pavement with Carbon Fiber Screens

Li,

Zhao,

Jing

et al. 2024

Materials

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The combination of an absorbing structure and a road is a promising strategy for road deicing using microwaves. In this study, cement mortar (CM) specimens containing a carbon fiber screen (CFS) were prepared to concentrate electromagnetic losses on a road surface. The effect of the size and depth of the CFS on the surface heating efficiency of the microwave was studied and optimized, and a microwave deicing experiment was conducted. The results indicated that the destructive interference produced by the CFS led to the effective surface heating of the CM/CFS specimens. The optimal surface heating rate was 0.83 °C/s when the spacing, depth, and width of the CFS were 5.22, 13.31, and 2.80 mm, respectively. The deicing time was shortened by 21.68% from 83 to 65 s, and the heating rate increased by 17.14% from 0.70 to 0.82 °C/s for the specimen with CFS-1, which was 15 mm depth. Our results demonstrate that CM/CFS composite structures can be effectively applied to increase the capacity and accelerate the development of the microwave deicing of roads.

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Development and performance research of new sensitive materials for microwave deicing pavement at different frequencies

Cited by 21 publications

References 18 publications

An Ultra-Thin, Microwave-Absorbing Wear Layer for Pavement Deicing

An Ultra-Thin, Microwave-Absorbing Wear Layer for Pavement Deicing

A comprehensive evaluation of asphalt concrete modified with ACP based on improved AHP and radar chart method

Enhanced Microwave Deicing Capacity of Cement Pavement with Carbon Fiber Screens

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