Mechanical properties and electromagnetic absorption characteristics of foam Cement-based absorbing materials

Foam concrete was introduced into traditional wave-absorbing building materials. Experiments were carried out to investigate the influence of carbon black and carbon fiber as wave-absorbing agents on the structural stability and the wave-absorbing performance of foam concrete matrix. The results show that the addition of CB will reduce the plasticity of slurry, which can be adjusted by water reducing agent in the range of 2 wt%. According to X-ray diffraction (XRD), pore structure change and compressive strength, nano-CB can effectively promote the formation of ettringite in sulphoaluminate cement, and the "nucleation " of nano-particles can enhance the cell structure of higher density and mechanical strength. After compound carbon fiber is added, the structural sta-bility is enhanced under the synergistic action of two particles, and the wave absorbing and loss performance of the material is improved under the combined effect of wave absorbing agent and micropores.