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Mechanical properties and electromagnetic absorption characteristics of foam Cement-based absorbing materials
Highlights The “nucleation effect” of nano-carbon black can accelerate the formation of ettringite. The plasticity of fresh slurry can be improved under the “sliding plate effect” of particles. The low-density foam concrete can improve the impedance matching. The electromagnetic wave absorption performance of the foam concrete can be improved by co-doping conductive fillers.
Abstract 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 stability 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.
Mechanical properties and electromagnetic absorption characteristics of foam Cement-based absorbing materials
Highlights The “nucleation effect” of nano-carbon black can accelerate the formation of ettringite. The plasticity of fresh slurry can be improved under the “sliding plate effect” of particles. The low-density foam concrete can improve the impedance matching. The electromagnetic wave absorption performance of the foam concrete can be improved by co-doping conductive fillers.
Abstract 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 stability 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.
Mechanical properties and electromagnetic absorption characteristics of foam Cement-based absorbing materials
Bai, Ying-hua (author) / Xie, Bo (author) / Li, Huawei (author) / Tian, Ran (author) / Zhang, Qi-hang (author)
2022-03-17
Article (Journal)
Electronic Resource
English
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