ABC algorithm-based optimization and evaluation of nano carbon black added multi-layer microwave absorbing ultra weight foam concrete

Yildizel S. A., Toktaş A.

Materials Today Communications, cilt.32, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.mtcomm.2022.104035
  • Dergi Adı: Materials Today Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Foam, Foam concrete, Absorbance, ABC algorithm, THERMAL-CONDUCTIVITY, DESIGN, RESISTANCE, STRENGTH
  • Ankara Üniversitesi Adresli: Evet

Özet

© 2022 Elsevier LtdThis research presents a study on the nano-carbon black (NCB) added ultra-weight foam concrete by revealing its potential utilization of multi-layer microwave absorbing foam concrete (MMAFC). The fresh and hardened properties of the foam concrete samples were investigated. Four concrete samples were constituted by adding NCB with 0%, 5%, 10% and 15%. They were microwave characterized so as to achieve complex permittivity and permeability values at the range of 8.2–12.4 GHz. An ABC algorithm-based optimization was also conducted to design four MMAFC with number of layer (NL)= 1, 2, 3 and 4. The results showed that dry density of foam concrete samples varied between 167 and 218 kg /m3, the thermal conductivity between 0.067 and 0.092 W / (m K), indicating better performances compared to the conventional foam concretes within the range of ultra-weight classification. The 4-layer MMAFC with 34.74 mm total thickness excessively satisfies the minimum requirement of 90% absorption (−10 dB reflection coefficient). Therefore, the proposed optimal MMAFC can be used in building for microwave absorbing and shielding.