Investigations on microwave deicing effects on graphite-modified concrete

Liu, Junliang; Xu, Jinyu; Lu, Song

doi:10.1039/c7ra04920j

Cited by 15 publications

(4 citation statements)

References 12 publications

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“…(11) When the surface center temperature T 0 of 0.6CFC3 reaches 0 °C, the temperature rise rate curve shows an increasing trend, but after a short time, there is an inflection point and the temperature rise rate starts to decrease, when the ice thickness decreases and the water layer has basically formed. (12) e temperature rise rate curve for 0.6CFC3 fluctuates in the 100s, compared to 0.6CFC2. It is initially determined that the phenomenon of ice breaking occurs at this time, which in turn triggers the temperature rise rate fluctuation.…”

Section: Effect Of Carbonmentioning

confidence: 93%

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Effect of Carbon Fiber Admixture and Length on Microwave Deicing Efficiency of Airport Road Surface Concrete

Ning

Wang

et al. 2022

Advances in Materials Science and Engineering

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In order to improve the microwave deicing efficiency of airport road surface concrete, the method of incorporating carbon fiber materials of different doping amounts and lengths into concrete is proposed. The test method is optimized by using a fiber-optic temperature sensor and a self-developed open microwave deicing vehicle, and the effect of the coupling effect of different carbon fiber doping and length on the microwave deicing efficiency of concrete is studied. The results of the study show that the appropriate amount of carbon fiber blended into the concrete can significantly improve the microwave deicing efficiency, and the reasonable use of carbon fiber-modified concrete can achieve the purpose of efficient deicing of the airport road surface. By analyzing the temperature rise curve, temperature rise rate curve, deicing effect, and infrared thermography of the microwave deicing process, combined with the “heat generation-heat dissipation” theory, the microwave deicing is divided into four stages: concrete wave absorption, water layer formation, ice thinning, and ice breaking and ice melting. In the process of microwave deicing of concrete, changing the length of carbon fiber and the amount of doping will have a greater impact on the rate of temperature rise and deicing range, but the shape of deicing remains basically the same, mainly spindle-shaped. When the length of carbon fiber is short, it is not conducive to the absorption of microwave by concrete, and with the increase of fiber length and doping amount, the wave absorption performance of carbon fiber-modified concrete on the airport road surface is gradually improved; when the fiber length is 0.6 cm and the fiber doping amount is 2‰, the wave absorption performance is the best, and the deicing rate is 1.82 times of ordinary concrete, and the deicing area is 1.2 times of ordinary concrete.

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Section: Effect Of Carbonmentioning

confidence: 93%

“…e results showed that the surface temperature of the specimen could reach more than 140 °C. In 2017, Liu et al [12] studied the effect of different amounts of graphite on the microwave deicing efficiency of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Fiber Admixture and Length on Microwave Deicing Efficiency of Airport Road Surface Concrete

Ning

Wang

et al. 2022

Advances in Materials Science and Engineering

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“…In this study, estimating the dielectric constant of the concrete wall was challenging because of the dampness caused by recent rainfall. To address this, we calibrated the dielectric constant using known parameters, including the location of the reinforcing bars, and set it as 10.5, which is a reliable value falling within the typical range observed for concrete [13].…”

Section: Gprmentioning

confidence: 99%

Sensitivity analysis on GPR A-scan data for cavity detection based on area estimation approach

Kim,

Nam,

Youn

2024

IOP Conf. Ser.: Earth Environ. Sci.

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This study aims to determine the optimal range of A-scan data that enables the detection of cavities in reinforced concrete structures using ground-penetrating radar (GPR). GPR is commonly used as a nondestructive testing method for detecting cavities. However, the identification of cavities using B-scan data is challenging when the cavities are obscured by highly reflective objects such as reinforcements. To address this issue, the B-scan data can be substituted with the A-scan data by adopting an area estimation approach. However, this approach requires the determination of the location and range of the A-scan data. In this study, we analyzed GPR A-scan data obtained from a large-scale concrete block with cavities adjacent to a complex reinforcement layout. The location and range were varied to investigate their effects on the accuracy of object detection using the area estimation approach, and an appropriate range was suggested.

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“…Wang et al [ 17 ] used steel slag from industrial waste to replace basaltic aggregates to improve the heating properties of asphalt mixtures. Liu et al [ 18 ] modified steel slag particles using the coprecipitation method and evaluated the microwave absorption efficiency as a function of electromagnetic properties and microwave heating rate. Gao et al [ 19 ] also used steel slag instead of aggregates and obtained specimens with an ice-melting efficiency about 2.6 and 2.3 times higher than the ordinary mixture at −5 °C and −20 °C, respectively.…”

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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Investigations on microwave deicing effects on graphite-modified concrete

Abstract: The microwave deicing method is one of the non-contact deicing methods.

Cited by 15 publications

References 12 publications

Effect of Carbon Fiber Admixture and Length on Microwave Deicing Efficiency of Airport Road Surface Concrete

Effect of Carbon Fiber Admixture and Length on Microwave Deicing Efficiency of Airport Road Surface Concrete

Sensitivity analysis on GPR A-scan data for cavity detection based on area estimation approach

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

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