摘要
针对传统单一微波加载下谐振波腔体中的混凝土表浅层温度低于中心的问题,本文提出一种微波-红外协同辐射降低混凝土温度不均匀性的新技术。构建微波-红外协同辐射下混凝土数值分析模型,对比分析单一微波辐射和微波-红外协同辐射下的混凝土温度演化规律。结果表明:单一微波辐射下混凝土中心温度显著高于表浅层,并随辐射时间增加,深部与表浅层温差不断拉大;红外波长较短能够实现对混凝土表浅层温度的补偿,在科学微波-红外辐射参数下混凝土表浅层与中心温差最大为2.3℃,且可实现同步升温,在加载90 s时表里温差距仅为0.7℃。本文可为微波改性混凝土技术提供一种新思路。
For the problem that the temperature of the shallow⁃surface layer of concrete in a resonant wave cavity is lower than that of the center under traditional single microwave treatment,this study proposesd a new technology of microwave⁃infrared synergistic radiation to reduce the temperature inhomogeneity of concrete.A numerical analysis model of concrete under microwave and infrared synergistic radiation was established,and the concrete temperature evolution laws under single microwave and microwave⁃infrared synergistic treatment were compared and analyzed.The results show that the central temperature of concrete under single microwave treatment is significantly higher than that of the shallow⁃surface layer.And as the treatment time increases,the temperature difference between the deep layer and the shallow⁃surface layer continues to widen.The short infrared wavelength can compensate the temperature of the shallow⁃surface layer of concrete.Under scientific microwave⁃infrared treatment parameters,the maximum temperature difference between the shallow⁃surface layer and the center of concrete is 2.3℃,and synchronous heating can be achieved.When loaded for 90 s,the temperature difference between the surface and the interior is only 0.7℃.This study can provide a new idea for the microwave⁃modified concrete technology.
作者
何文瑞
潘锦辉
祝言睿
HE Wenrui;PAN Jinhui;ZHU Yanrui(School of Architectural Engineering,Jiaxing Nanhu University,Jiaxing 314001,Zhejiang,China)
出处
《上海建材》
2025年第6期79-82,共4页
Shanghai Building Materials
基金
博士后面上基金项目(2024M763553)
浙江省教育厅一般项目(Y202352229)
浙江省住建厅科研项目(2024K266)
嘉兴市青年科研计划项目(2024AY40014)。
关键词
微波
红外
协同辐射
温度
深层
表浅层
microwave
infrared
synergistic radiation
temperature
deep layer
shallow⁃surface layer
