电磁波在混凝土材料表面的透射率研究  

Transmission rate of electromagnetic wave in concrete material surface

作　　者：周道传[1] 朱海堂[2] 

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212003 [2]郑州大学河南省电磁检测工程技术研究中心,河南郑州450002

出　　处：《功能材料》2011年第S4期635-638,643,共5页Journal of Functional Materials

基　　金：河南省重点科技攻关计划资助项目(0423034100)

摘　　要：通过建立电磁波在混凝土材料表面传播的基本理论模型,从理论上分析了混凝土表面透射率和混凝土材料电磁参数的关系,在实验室条件下,浇筑了不同混凝土材料组分的试件,利用电磁脉冲实验仪器对试件进行了电磁脉冲实验,研究了不同混凝土材料组分参数及龄期对电磁波在混凝土材料表面透射的影响规律。研究表明电磁波在混凝土表面的透射率仅与混凝土材料的介电参数有关,混凝土的相对介电常数越大,电磁波在混凝土表面的透射率越小。在混凝土材料组分中,混凝土浇筑单位体积含水量对电磁波在混凝土表面的透射率影响最为明显。在各个龄期下,混凝土单位体积用水量越大,透射率越小;20d之前,透射率随龄期增长而变大,20d后,透射率将保持在一个稳定的数值。By establishment of basic theoretical model of electromagnetic wave propagation on concrete material surface,relationship of transmission rate and concrete electromagnetic parameters was analyzed.Concrete material specimens were casted under laboratory condition and tested by electromagnetic pulse experimental apparatus.Effect and influence law of different concrete components and ages to the electromagnetic wave transmission were studied by the test result.Research shows that transmission rate in concrete material surface is only relevant with the material dielectric parameter.The greater concrete relative dielectric constant is,the smaller transmission rate in surface is.Among the concrete casting components,unit volume water content has the most obvious influence on transmission rate.The greater unit volume water content is used,the smaller transmission rate is at different ages.When concrete age is before 20d,transmission rate is growing with age rapidly;after 20d,transmission rate will be maintained at a stable value.

关 键 词：混凝土材料 表面透射率 电磁脉冲实验 相对介电常数 电磁屏蔽性能 

分 类 号：TU528[建筑科学—建筑技术科学]