【摘要】 利用纳米TiO₂掺合料、TiO₂功能集料双组分复掺的方法制备得到电磁吸波混凝土。研究了纳米TiO₂掺量、匹配层以及试样厚度对混凝土电磁吸波性能的影响,结果表明,TiO₂掺量为3%、10mm吸波混凝土加10mm匹配层的结构,其吸波性能最佳。分析认为纳米TiO₂掺量、匹配层的变化影响了混凝土与自由空间的波阻抗匹配,进而影响了电磁吸波性能。制备的电磁吸波混凝土具有良好的物理、力学性能,28d抗压强度超过40 MPa,可直接用作结构材料。更多还原

【Abstract】 Electromagnetic wave absorbing concrete was prepared by using nano TiO₂ admixture and TiO₂-containingfunctional aggregate as the electromagnetic wave absorbents.The effects of the TiO₂ content,matching layer and the thickness of the specimen on the electromagnetic wave absorption of concrete were investigated.Results show that the electromagnetic wave absorption was optimal,when the content of nano TiO₂ was 3%and its structurewas consisted of 10 mm thick matching layer plus 10 mm thick concrete layer.It is analyzed that the TiO₂ content and matching layer affected the wave impedance matching between concrete and free space,and in further affected the electromagnetic wave absorption.The prepared electromagnetic wave absorbing concrete has good physical and mechanical properties.The 28 dcompressive strength of the prepared concrete was more than40 MPa,which could be used as structural material directly.更多还原