Recent development of microwave applications for concrete treatment

Wei, Wei; Shao, Zengwu; Qiao, Rujia; Chen, Wenwen; Zhou, Hang; Yuan, Yuan

doi:10.1016/j.conbuildmat.2020.121224

Cited by 62 publications

(13 citation statements)

References 156 publications

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“…This diffusion is highly dependent on the thermal conductivity of materials and remains slow in the case of polymers due to their low thermal conductivity. As microwave heating occurs through the motion of molecules, this heating process leads to specific properties [20].…”

Section: The Peculiarities Of Microwavementioning

confidence: 99%

Polymer Processing under Microwaves

Belkhir

Riquet

Becquart

2022

Advances in Polymer Technology

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Over the last decades, microwave heating has experienced a great development and reached various domains of application, especially in material processing. In the field of polymers, this unusual source of energy showed important advantages arising from the direct microwave/matter interaction. Indeed, microwave heating allows regio-, chemio-, and stereo-selectivity, faster chemical reactions, and higher yields even in solvent-free processes. Thus, this heating mode provides a good alternative to the conventional heating by reducing time and energy consumption, hence reducing the costs and ecological impact of polymer chemistry and processing. This review states some achievements in the use of microwaves as energy source during the synthesis and transformation of polymers. Both in-solution and free-solvent processes are described at different scales, with comparison between microwave and conventional heating.

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Section: The Peculiarities Of Microwavementioning

confidence: 99%

Polymer Processing under Microwaves

Belkhir

Riquet

Becquart

2022

Advances in Polymer Technology

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“…Despite the good results, there are a number of other problems that hinder the use of anti-icing techniques on a large scale. One of these is the economic disadvantage of using microwave absorbers and conductive fillers in large areas of road surface [ 108 , 109 , 110 , 111 ]. In addition, the effectiveness of heating and absorbing microwaves of materials depends on their location in the asphalt/concrete structure.…”

Section: Electrothermal Composite Materials For De-icing Applicationsmentioning

confidence: 99%

A Mini-Review on Recent Developments in Anti-Icing Methods

et al. 2021

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An aggressive impact of the formed ice on the surface of man-made objects can ultimately lead to serious consequences in their work. When icing occurs, the quality and characteristics of equipment, instruments, and building structures deteriorate, which affects the durability of their use. Delays in the adoption of measures against icing endanger the safety of air travel and road traffic. Various methods have been developed to combat de-icing, such as mechanical de-icing, the use of salts, the application of a hydrophobic coating to the surfaces, ultrasonic treatment and electric heating. In this review, we summarize the recent advances in the field of anti-icing and analyze the role of various additives and their operating mechanisms.

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“…Using waste concrete to produce recycled coarse aggregate which is the leading trend of waste concrete disposal can reduce environmental pollution and waste of resources (Gebremariam et al 2020;Liebezeit et al 2017). The service performance of coarse aggregate was reduced because of the adhesive mortar on the surface of recycled coarse aggregate (Verian et al 2018;Wei et al 2021a;Zhang et al 2020), it has lower density and higher water absorption (Larsen et al 2020), so the mortar needs to be removed before use. Using the microwave to produce recycled coarse aggregate was first proposed in 2011 (Tsujino et al 2011), and scholars have launched a series of studies.…”

Section: Introductionmentioning

confidence: 99%

Study on Microwave-assisted Liberating Coarse Aggregate Based on the Coupling Method of Finite Element and Discrete Element

Liu

Chen³

et al. 2022

ACT

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A coupling method of finite element and discrete element was used to simulate the process of microwave liberating coarse aggregate under different power conditions, and it deals with the problem that the finite element method can not simulate the cracking process and the discrete element method can not consider the nonuniformity of microwave in the concrete specimens. The liberation ratio was proposed as the quantitative evaluation index, and the influence of microwave power on the liberating effect was analyzed based on the change of the liberation ratio. The mechanism of microwave-assisted liberation was discussed. It was found that the temperature distribution and crack distribution in the test specimens changed with irradiation time and microwave power; the optimal irradiation time and the optimal microwave power were obtained by liberation ratio under different irradiation conditions, and the simulation results were verified by preliminary tests; the coarse aggregate was under tension in both circumferential and radial, while the mortar is under compression in circumferential and under tension in radial under microwave irradiation. Cracks are produced by tensile stress at the junction of coarse aggregate and mortar, then the coarse aggregate are liberated from the mortar.

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Recent development of microwave applications for concrete treatment

Cited by 62 publications

References 156 publications

Polymer Processing under Microwaves

Polymer Processing under Microwaves

A Mini-Review on Recent Developments in Anti-Icing Methods

Study on Microwave-assisted Liberating Coarse Aggregate Based on the Coupling Method of Finite Element and Discrete Element

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