Heating Characteristics and Deicing Properties of Magnetite Mortar Microwave-Absorbing Layer on Concrete Pavement

Qiu, Heping; Wu, Yongchang; Wu, Jiayu; Liu, Yimin; Lin, Yuruo

doi:10.1061/jmcee7.mteng-15729

Cited by 10 publications

(2 citation statements)

References 45 publications

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“…The application of a conductive metal mesh shielding layer and magnetite sand shielding layer significantly improves the microwave thermal conversion efficiency [27]. This indicates that both shielding layers effectively shield and reflect microwaves, reducing microwave leakage to the underlying pavement structure and enhancing microwave heating efficiency [28].…”

Section: Heating Effectmentioning

confidence: 92%

Properties of Concrete Reinforced with a Basalt Fiber Microwave-Absorbing Shielding Layer

Jiang,

Song,

Wang

et al. 2023

Sustainability

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The purpose of this study was to propose a highly efficient, durable, and environmentally friendly method for the rapid removal of ice and snow. A microwave-absorbing functionality layer was placed between a conductive metal mesh and magnetite sand shielding layer, and ordinary cement concrete (OC). Microwave heating, mechanical strength determination, and indoor and outdoor de-icing tests were performed on the cement concrete specimens with the shielding layer. Basalt fibers were added to the absorbing functionality layer, and the formed specimens were tested for strength and durability. The microstructure was observed using SEM experiments. The results show that the temperature rise of microwave-absorbing cement concrete with a magnetite sand shielding layer (MCMS) and microwave-absorbing cement concrete with a conductive metal mesh shielding layer (MCMM) increased by approximately 17.2% and 27.1%, respectively, compared to that of microwave-absorbing concrete (MAC). After freeze–thaw cycles, the compressive strength and flexural strength of microwave-absorbing concrete with basalt fiber (MAB) increased by 4.35% and 7.90% compared to those of MAC, respectively. The compressive strength and flexural strength of microwave-absorbing concrete with a magnetite sand shielding layer and basalt fiber (MAMB) increased by 8.07% and 6.57%, respectively, compared to those of MCMS. Compared to specimens without basalt fiber, the wear rate per unit area of MAMB decreased by 8.8%, and the wear rate of MAB decreased by 9.4%. The water absorption rate of MAMB specimens decreased by 13.1% and 12.0% under the conditions of 20 and 40 microwave freeze–thaw cycles, respectively, compared to that of MCMS. The water absorption rate of MAB specimens decreased by 9.9% and 8.3% under the conditions of 20 and 40 microwave freeze–thaw cycles, respectively, compared to that of MAC. SEM analysis showed that the addition of basalt fibers improved the compactness and stability of the cement concrete structure as a whole. This study provides valuable references for the promotion and application of microwave de-icing technology.

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Section: Heating Effectmentioning

confidence: 92%

Properties of Concrete Reinforced with a Basalt Fiber Microwave-Absorbing Shielding Layer

Jiang,

Song,

Wang

et al. 2023

Sustainability

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“…Wu [ 32 , 33 ] established a correlation between the freeze-adhesion strength, contact angle, and freeze-adhesion temperature using the QLL sandwich model and capillary pressures. Qiu [ 34 , 35 , 36 ] combined QLL and microwave technology for de-icing concrete pavements. However, research specifically targeting the QLL at the ice–asphalt interface has been limited.…”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Analysis of the Thickness and Adhesion Characteristics of the Quasi-Liquid Layer at the Asphalt–Ice Interface

Jiao,

Yao,

Qiu

et al. 2024

Materials

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The quasi-liquid layer (QLL), a microstructure located between ice and an adhering substrate, is critical in generating capillary pressure, which in turn influences ice adhesion behavior. This study employed molecular dynamics (MD) methods to obtain QLL thickness and utilized these measurements to estimate the adhesive strength between ice and asphalt. The research involved constructing an ice–QLL–asphalt MD model, encompassing four asphalt types and five temperature ranges from 250 K to 270 K. The QLL thickness was determined for various asphalts and temperatures using the tetrahedral order parameter gradient. Additionally, capillary pressure was calculated based on the QLL thickness and other geometric parameters obtained from the MD analysis. These findings were then compared with ice adhesion strength data acquired from pull-off tests. The results indicate that QLL thickness varies with different asphalt types and increases with temperature. At a constant temperature, the QLL thickness decreases in the order of the basal plane, primary prism plane, and secondary prism plane. Furthermore, the adhesion strength of the QLL diminishes as the temperature rises, attributed to the disruption of hydrogen bonds at lower temperatures. The greater the polarity of the asphalt’s interface molecules, the stronger the adhesion strength and binding free energy. The MD simulations of the asphalt–ice interface offer insights into the atomic-scale adhesive properties of this interface, contributing to the enhancement in QLL property prediction and calibration at larger scales.

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Effect of calcium-silicate-hydrate (C-S-H) nano-crystals on the hydration rate and early strength of microwave-absorbing cement mortar containing magnetite (Fe3O4) powder

Qiu,

Wu,

et al. 2023

Ceramics International

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Heating Characteristics and Deicing Properties of Magnetite Mortar Microwave-Absorbing Layer on Concrete Pavement

Cited by 10 publications

References 45 publications

Properties of Concrete Reinforced with a Basalt Fiber Microwave-Absorbing Shielding Layer

Properties of Concrete Reinforced with a Basalt Fiber Microwave-Absorbing Shielding Layer

A Molecular Dynamics Analysis of the Thickness and Adhesion Characteristics of the Quasi-Liquid Layer at the Asphalt–Ice Interface

Effect of calcium-silicate-hydrate (C-S-H) nano-crystals on the hydration rate and early strength of microwave-absorbing cement mortar containing magnetite (Fe3O4) powder

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