Application of Low-Carbon Ecofriendly Microwave Heat Curing Technology to Concrete Structures Using General and Multicomponent Blended Binder

Koh, Taehoon; Hwang, Seonkeun; Pyo, Sukhoon; Moon, Do-Young; Yoo, Han-ju; Lee, Donggeun

doi:10.1061/(asce)mt.1943-5533.0002472

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…Specifically, the joints, a crucial part of the culverts, play a pivotal role in determining the overall safety of the structure under high temperatures. Though some research has touched upon this issue, further exploration in this realm remains essential [8,9].…”

Section: Introductionmentioning

confidence: 99%

Thermal Effects on Prefabricated Box Culverts and Implications for Joint Performance under Elevated Temperatures

Di,

Wang,

Huang

2023

IJHT

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With the rapid progression of urbanisation and the continual refinement of transportation networks, prefabricated box culverts have increasingly attracted attention as modern structural components. Their rapid construction and environmentally friendly characteristics have rendered them a favoured choice within the engineering community. However, under high-temperature conditions, such as in fires or high-temperature industrial processes, concerns remain about the temperature distribution within these culverts and the subsequent impact on joint performance. Although some studies have addressed the temperature distribution and thermal effects associated with these culverts, most have been grounded in theoretical assumptions or have only engaged in preliminary experiments. In this research, an in-depth analysis of the temperature distribution within prefabricated box culverts under high-temperature conditions and the implications for joint performance is undertaken. Advanced finite element analysis tools are utilised for simulations. The findings provide the engineering community with comprehensive and precise reference data, holding significant implications for the design, construction, and maintenance of future prefabricated box culverts.

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Section: Introductionmentioning

confidence: 99%

Thermal Effects on Prefabricated Box Culverts and Implications for Joint Performance under Elevated Temperatures

Di,

Wang,

Huang

2023

IJHT

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“…Accelerated concrete curing methods using microwave (MW) energy have also been introduced in previous research [3,[5][6][7][8][9][10][11][12]. Curing of concrete with MW energy is mainly divided into two methods: (1) direct heating of concrete in the MW oven, and (2) heating of concrete using the transferred heat generated in the steel form.…”

Section: Introductionmentioning

confidence: 99%

“…It is noted that this method uses MW ovens for curing concrete and, therefore, its utilization in the construction field is still limited due to the applicable size of concrete members is restricted by the size of the MW ovens. The second curing method using MW energy has been developed relatively recently [11,12]. In this method, specially designed steel forms incorporating MW absorbers are required and MW units are attached to these forms.…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel Concrete Curing Method Using Induction Heating System

2020

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This study aimed to develop an accelerated concrete curing method based on induction heating (IH) technology. The proposed curing method provides improved heating efficiency and safety since it directly heats only the metallic forms in a non-contacting manner. It also has the advantage of being capable of heating the concrete according to a desirable heating scenario. The effects of several parameters on its performance were evaluated using a finite element method (FEM)-based thermal analysis and heating performance tests. The FEM analysis revealed the steel form to be appropriate for the IH system. The analysis also revealed that equally spaced three-turn coils yielded increased temperature uniformity in the steel form, which was verified by results of the steel form heating experiments. Furthermore, the minimum temperature generated in the form was sufficient for concrete curing. The efficiency of the use of IH for concrete curing and the effects of curing parameters were further investigated through compression tests after applications of various curing methods and by examining the temperature distributions during curing. The test results revealed early strength development even under water freezing conditions. This demonstrated the effectiveness of IH for concrete curing in cold weather. However, the efficiency decreased when the cross-sectional dimension of the specimen increased. The test results also verified that the maximum temperature and duration of induction heat curing affect the early age strength of concrete.

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“…This study developed a new method of efficiently curing concrete using microwave (MW) heat in the minimum space. The MW heating technology provides advantages, such as rapid and uniform heating and high thermal efficiency, which can be utilized in various industrial fields [7,8,9]. Figure 2 shows the heating of a steel form using the MW heating technology.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Precast Concrete Using Microwave Heating Form

et al. 2019

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The purpose of this study is to evaluate the temperature distribution, strength development, porosity, scanning electron microscopy observation, shrinkage, and surface properties of concrete in order to apply microwave heat curing to the precast method and to analyze the CO2 emissions and economic feasibility of microwave heat curing. The heating of a steel form by microwave heating enabled concrete to be efficiently cured at a temperature within a range of ±5 °C. After the curing, demolding strength could be cleared through the densification of the concrete by decreasing the porosity of the concrete. Microwave heat curing exhibited excellent performance compared to conventional steam curing in terms of efficient temperature control, occurrence of cracks due to shrinkage, surface condition of concrete after curing, economic efficiency, and CO2 emissions. However, verification and supplementation based on actual data are necessary so that environments applicable to the various sizes and shapes of forms can be prepared.

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Application of Low-Carbon Ecofriendly Microwave Heat Curing Technology to Concrete Structures Using General and Multicomponent Blended Binder

Cited by 10 publications

References 3 publications

Thermal Effects on Prefabricated Box Culverts and Implications for Joint Performance under Elevated Temperatures

Thermal Effects on Prefabricated Box Culverts and Implications for Joint Performance under Elevated Temperatures

Development of a Novel Concrete Curing Method Using Induction Heating System

Performance Evaluation of Precast Concrete Using Microwave Heating Form

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