Effects of quartz sand on the electromagnetic wave absorption of cementitious materials

HIGHLIGHTS

• What: This study investigates the EMW-absorption performances within the frequency range of 2 GHz to 18 GHz of cement paste and mortar samples with different sand-to-cement ratios (S/C) water-to-cement ratios (W/C) and thicknesses. In this work, the influences of quartz sand and air in pores on the EMW-absorption performance of cementitious materials are investigated. In this study, the frequency range where the RL value is below -10 dB was designated as the effective bandwidth (Be ) for the sample being tested. Coherent loss occurs when two EMWs with the same . . .
  

   

  

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