Effects of Carbon Fiber Length on Microwave Behavior of Hardened Cement Paste
XI Xiang
ZHAO Zijie
YIN Haotian
ZHANG Wenyi
WANG Lin
Abstract：Carbon fibers,with different lengths,were used to modify the cement paste.The effects of carbon fiber length on the microwave behavior of carbon fiber-reinforced cement paste(CFRC)were studied by analyzing how the length affects the mechanical,dielectric,and microwave behavior.The results show that the compressive strength and flexural strength of CFRC increase first and then decrease with increasing carbon fiber length,such that the highest strengths are obtained at a length of 1 mm.The electromagnetic interference shielding mechanism of CFRC is dependent on carbon fiber length:the reflection is dominant at lengths of 1,9,12 mm,while absorption is dominant at a length of 6 mm.The reflection of CFRC to electromagnetic waves is due to the mismatch of impedance,while the absorption of electromagnetic waves is due to dipolar polarization,relaxation polarization,and space-charge polarization.
Keywords：cement-based materialcarbon fibermicrowaveelectromagnetic interference shieldingdielectric property
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 573-580 )