Numerical Simulation on the Influence of Reinforced Concrete on Electric field and Temperature Fields during Concrete Curing
Main Article Content
Abstract
This study aims to investigate and numerically analyze the use of 2.45 GHz microwave irradiation at a power level of 800 W to accelerate the curing process and enhance the early-age compressive strength of reinforced concrete. The research focuses on reinforced concrete using Deformed Bars (DB) and Round Bars (RB) steelwith a slab thickness of 150 mm. The influence of steel reinforcement on the distribution of electromagnetic fields and temperature fields within the concrete is examined. The results reveal that reflections of electromagnetic waves from metallic surfaces induce electromagnetic resonance inside the concrete, causing higher temperatures near the top surface and limiting heat penetration into deeper regions when compared with plain concrete under the same exposure time. In addition, it was observed that, for reinforced concrete, the time required to raise the surface temperature to 57 °C, considered optimal for accelerating strength development, is approximately 7 minutes. The findings contribute to a deeper understanding of microwave-assisted curing in reinforced and precast concrete used in roadway and standard wall construction. They also provide insights into optimal internal temperature distribution and suitable surface temperatures for reinforcing the design of electromagnetic-field control systems aimed at achieving target curing temperatures in future applications. The general model results were validated by comparison with both numerical simulations and experimental data from previous studies under identical conditions, demonstrating strong agreement.
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