The influence of absorbing powder and steel fiber on the performance of wave absorbing concrete
LI Wenjing
Abstract：The study investigated the effects of the volume fractions of hematite powder,magnetite,and manganese dioxide and volume fractions of steal fiber on the electromagnetic wave absorption properties and mechanical properties of wave absorbing concrete.The results showed that as the volume fraction of the absorbing powder increased,the mechanical properties of the hematite powder were negatively correlated with the test piece;the opposite was true for magnetite;and manganese dioxide caused the mechanical properties of the test piece to rise and then fall.All the absorbing powder test pieces resulted in a decrease in the electrical resistivity of the test piece,with magnetite having the most significant effect.Its volume fraction of 10%resulted in a resistivity of 171 Ω·cm,indicating that the absorbing powder can enhance the electromagnetic wave absorption properties of concrete.As the volume fraction of the wavy steel fiber increased,the mechanical properties of the splitting test piece all showed a trend of first increasing and then decreasing.The minimum value of the compressive strength was 36.02 MPa,and the maximum value was 41.32 MPa.The minimum value of the splitting tensile strength was 1.57 MPa,and the maximum value was 1.96 MPa.The electrical resistivity of the test piece decreased from 175 Ω·cm to 19 Ω·cm.
Keywords：absorbing powdersteel fiberwave absorbing concreteelectrical resistivity
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 40-42,58 )