Study on Microwave Deicing of Carbon-Fiber-Modified Concrete under Multi-Factor Coupling Effect

Xu, Jinyu; Yao, Ao; Wei, Xia; Bai, Erlei; Ning, Yipeng

doi:10.3390/app12115551

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…In addition, other studies have analyzed the reduction in the high electrical resistance of concrete to improve its heating performance and prevent its freezing in winter and its utilization for various purposes such as de-icing [13][14][15]. In particular, the de-icing research intended to improve thermal conductivity performance with improved electrical conductivity when CNTs are mixed into the concrete mixture [16,17]. The technologies have been developed and studied to prevent the road from freezing by heating concrete by supplying electrical energy to the concrete with increased electrical and thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Electrical Characteristics of Ultra-High-Performance Concrete Containing Carbon-Based Materials

et al. 2022

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Recently, carbon materials with unique properties, such as high tensile strength and electrical conductivity, have been extensively investigated for the multi-functionalization of concrete. Previous studies mainly focused on improving the performance of normal-strength concrete using carbon nanomaterials, such as carbon nanotubes and graphene nanoplates. Therefore, this study analyzed the effect of carbon materials on ultra-high-performance concrete (UHPC) mixed with steel fibers, which has an outstanding mechanical performance. In addition, length effects were investigated for carbon fibers with nanometer, micrometer, and millimeter sizes. The influences of carbon materials on 120 MPa UHPC were investigated, including expanded graphite, a well-known superior conductivity material. Electrical conductivity, compressive strength, tensile strength, and electrical conductivity were analyzed experimentally. As a result, compressive strength tends to decrease as the concentrations of carbon materials increase, and chopped fiber has the best performance at 10.5 MPa in terms of tensile strength. Since the electrical conductivity of chopped fiber was observed to be significantly higher than that of other materials at 6.6 times, millimeter-sized fiber would be most suitable as a carbon material for concrete. This study could guide future research on the multi-functionalization of UHPC with carbon-based materials, including mechanical and electrical conductivity performances.

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Section: Introductionmentioning

confidence: 99%

Electrical Characteristics of Ultra-High-Performance Concrete Containing Carbon-Based Materials

et al. 2022

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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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“…Tiyasangthong et al [ 22 ] evaluated the possibility of using high-calcium fly ash geopolymers to stabilize a recycled concrete aggregate. Huang et al [ 23 ] studied the deicing efficiency of concrete surfaces with added carbon fibers under multiple factors and obtained an optimum fiber length of 0.6 cm, while the initial temperature and the ice layer had little effect on microwave heating. Wang et al [ 24 ] blended magnetite and carbon fiber as the microwave absorbers and showed that the deicing efficiency of the asphalt pavement was enhanced to some extent.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Heating and Deicing Performance of Microwave-Absorbing Asphalt Mixtures

et al. 2023

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Road icing in winter brings challenges to traffic safety, and microwave heating and deicing technology is an effective method with the advantages of high efficiency and environmental protection. Magnetite has been widely used as a microwave-absorbing material in pavement. In this paper, magnetite powder formed by crushing natural magnetite and high-purity Fe3O4 powder after purification were mixed to replace mineral powder, and the magnetite aggregate was used to replace the limestone aggregate with the same particle size to enhance the asphalt mixtures’ microwave absorption capacity. The effect of microwave heating time and microwave power on the heating of the asphalt mixtures was studied, and the heating performance of different thicknesses of the asphalt mixtures under microwave radiation was evaluated. The heating performance of the mixtures under different initial temperatures and ice layer thicknesses was also assessed. The results showed that the addition of the magnetite powder–Fe3O4 powder and the magnetite aggregate significantly enhanced the heating performance of the asphalt mixtures by microwave heating. The replacement of the magnetite powder–Fe3O4 powder, the microwave heating time, and the microwave power had positive effects on the heating efficiency of the asphalt mixtures. Moreover, the thinner asphalt mixtures had a better heating performance. The heating and deicing performance of the mixtures decreased with a decline in initial temperature. As the ice thickness increased, the deicing time of the specimen surface to reach 0 °C also increased.

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Study on Microwave Deicing of Carbon-Fiber-Modified Concrete under Multi-Factor Coupling Effect

Cited by 8 publications

References 23 publications

Electrical Characteristics of Ultra-High-Performance Concrete Containing Carbon-Based Materials

Electrical Characteristics of Ultra-High-Performance Concrete Containing Carbon-Based Materials

Enhanced Microwave Deicing Capacity of Cement Pavement with Carbon Fiber Screens

A Study on the Heating and Deicing Performance of Microwave-Absorbing Asphalt Mixtures

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