摘要
基于终端开路同轴探头法,利用谱域准静态模型,开发了一套建筑用混凝土块等效电参数测量系统。测量混凝土样品制作简单,只需使样品上下两面光滑平整即可,且满足宽频带要求。利用开口同轴探头法测量了两种现有混凝土块的相对复介电常数并推导出其等效电导率,其结果能够较好地符合参考值。通过对测量结果的分析得到,不同砂子和水泥比率混凝土样品的相对偏差在0.9～1.8 GHz时不超过7%,钢筋对混凝土介电特性的影响较大,在0.5～1.8 GHz时钢筋上方的测试点电容率位于8～10之间,而无钢筋测试点则为5～7之间。
Based on the terminal-opening-coaxial probe method and using spectral domain standard static model,a set of relative complex dielectric constant testing system of the building concrete blocks was developed.It was easier to make the concrete sample of the system,just to make the two sides of the concrete sample smooth and flattening.The algorithm was quite mature and met the wideband requirements.Using the open coaxial probe method,the relative complex permittivity of two reinforced concrete blocks was measured.And the equivalent conductivity was derived.The results could be well accord with the reference value.It also showed the relative deviation of concrete specimens having different sand/cement ratios did not exceed 7% at 0.9 GHz to 1.8 GHz.The dielectric properties of concrete were affected by the steels：measured permittivity between 8 and 10 at 0.5～1.8 GHz above steel,and between 5 and 7 without steel.
出处
《混凝土》
CAS
CSCD
北大核心
2012年第10期21-25,共5页
Concrete
基金
国家环保部环保公益性行业科研专项(200909106)
关键词
电磁辐射预测
等效电参数
开口同轴探头法
混凝土块
electromagnetic radiation forecast
equivalent electric parameter
open coaxial probe method
concrete block
