Investigating microwave deicing efficiency in concrete pavement

Lu, Song; Xu, Jie; Bai, Erlei; Liu, Junliang; Luo, Xu

doi:10.1039/c6ra27109j

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…38,39) The increase in absorbance at 250 nm is attributed to the generation of C-C double bonds. 40) The change in the absorbance of PVC upon X-ray irradiation was negligible on the coloring due to the oxidation reaction of LCV because the absorbance at 410 and 600 nm was changed by the oxidation of LCV, as shown in Fig. 3(a).…”

Section: Resultsmentioning

confidence: 95%

Development of radiochromic dosimeters based on polyvinyl chloride films containing leuco crystal violet

Kawamura

Kawamoto

Fujimoto

et al. 2020

Jpn. J. Appl. Phys.

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We fabricated polyvinyl chloride (PVC) films containing leuco crystal violet (LCV) to develop a radiochromic material with high sensitivity to radiation. For comparison, polyvinyl butyral, polystyrene, and poly(methyl methacrylate) films containing LCV were additionally prepared. The absorption spectra of these films before and after X-ray irradiation were measured. The change in the absorbance of the PVC film at 600 nm was 2.9-32 times those of other films at a radiation dose of 4 kGy. This result suggested that the generation of crystal violet (CV + ) proceeded efficiently by radicals generated from PVC. The addition of 1 wt% trichloroacetic acid (TCA) to a PVC film containing LCV increased the change in absorbance 1.2 times. This result suggested that the radicals generated by the decomposition of TCA induced the generation of CV + . The sensitivity to radiation of the film was 4.2-28 times greater than those of conventional plastics containing leuco dyes.

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Section: Resultsmentioning

confidence: 95%

Development of radiochromic dosimeters based on polyvinyl chloride films containing leuco crystal violet

Kawamura

Kawamoto

Fujimoto

et al. 2020

Jpn. J. Appl. Phys.

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“…In 1987, Jack Monson studied the winter road non-contact deicing project and designed a microwave deicer. The project failed to be implemented because the deicing efficiency was too low [11,12]. Lindroth Ye et al established the microwave deicing model, designed the microwave deicing test vehicle [13,14], and conducted further research on road microwave deicing technology.…”

Section: Introductionmentioning

confidence: 99%

Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

et al. 2018

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A method of deicing using microwave heating is proposed to make scientific and economical road deicing in a cold area, and to make up for deficiencies in the existing methods for melting snow and ice. This paper proposes to define microwave deicing efficiency as the heating rate of a concrete surface when heated to 0 °C (the efficiency of deicing is equal to the difference divided by heating time, which is between 0 °C and the initial temperature at the junction of ice and concrete). Based on the mechanism of microwave heating and deicing, a method combining the finite element simulation model with indoor experiments was proposed to study the deicing efficiency of microwaves, and the effects of different microwave frequencies and different road structure materials on microwave deicing efficiency were analyzed. The results show that the microwave frequency and road structure materials have a great influence on microwave deicing. For asphalt concrete, the ice melting efficiency of 5.8 GHz is 4.31 times that of 2.45 GHz, but the heating depth is less than that of 2.45 GHz. At 2.45 GHz, the melting efficiency of cement concrete is 3.89 times that of asphalt concrete. At 5.8 GHz, the melting efficiency of cement concrete is 5.23 times that of asphalt concrete. Through the consistency of the simulation and experimental results, the validity of the simulation model based on the finite element theory is verified. The results provide theoretical guidance and a practical basis for future applications of microwave deicing.

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“…e time of effective deicing area is shortened by 40 seconds. In 2018, Liu et al [13][14][15][16][17] found that the incorporation of iron black into concrete can improve the deicing efficiency and a greater range of deicing, and the microwave heating efficiency was increased by 192% at 15% admixture, but the incorporation of iron black reduced the mechanical properties of concrete. In 2019, Wang et al [18] prepared microwave heated aggregate (MHA) from magnetite and replaced the original aggregate.…”

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 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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Investigating microwave deicing efficiency in concrete pavement

Abstract: Microwave deicing is an intelligent and environmentally friendly method that overcomes the many shortfalls of traditional deicing methods, including mechanical, chemical and thermal techniques.

Cited by 13 publications

References 5 publications

Development of radiochromic dosimeters based on polyvinyl chloride films containing leuco crystal violet

Development of radiochromic dosimeters based on polyvinyl chloride films containing leuco crystal violet

Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

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

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