Exploring the influence and mechanisms of functionalized nanoscale wood fiber on the electromagnetic transmission performance of OPC paste

With the advent of the 5 G era, data transmission is faster, but because the concrete is a natural wave absorber agent, the signal in underground space, building groups and other areas is still poor, and there are few reports on how to improve the electromagnetic transmission performance of concrete in the 5 G frequency band and mechanism analysis. In addressing these issues, this study incorporated 0 wt%, 1 wt%, 2 wt%, and 3 wt% functionalized nanoscale wood fiber (NWF) into ordinary Portland cement (OPC) paste to assess their impact on the compressive strength and electromagnetic transmission performance (ETP). The findings reveal that while NWF reduces the OPC paste compressive strength. However, it exerts a positive influence on the molecular structure, electrostatic force, pore solution, and pore structure. Ultimately, the ETP of OPC paste can be enhanced by 10.3-47.1%. Notably, at 2 wt% NWF content, the ETP is significantly improved (boosted by 33.1%), with an impressive electromagnetic transmission coefficient of 66.8%, while the compressive strength is only reduced by 16.7%.