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

Yıldızel, Sadık Alper; Toktaş, Abdurrahim

doi:10.1016/j.mtcomm.2022.104035

Cited by 10 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, the effective compaction of the material of interpore partitions to eliminate capillary porosity in them and increase the area of phase contacts between particles was achieved using a nanomodifying microsilica additive. Microsilica acts as a filler, it provides a denser packing of particles, and also promotes the additional formation of calcium silicate hydrate (CSH) [ 36 , 49 , 50 , 51 ]. Thus, a larger amount of CSH contributes to a denser packing of particles of inert components in the material of the interpore wall as well as faster curing of foam concrete and, accordingly, higher values of compressive strength [ 30 , 52 , 53 ].…”

Section: Resultsmentioning

confidence: 99%

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

et al. 2022

View full text Add to dashboard Cite

Some of the primary problems of construction are brittleness and low the mechanical properties of good thermal insulation materials. Heat-insulating foam concrete has a low thermal conductivity. However, it is practically impossible to transport it over long distances since corners are cracked during transportation, the structure is broken, and, in principle, the fragility of this material is a big problem for modern buildings. The purpose of this study was to develop a heat-insulating foam concrete with improved characteristics by experimentally selecting the optimal dosage of polypropylene fiber and a nanomodifying microsilica additive. Standard methods for determining the characteristics of fiber foam concrete were used as well as the method of optical microscopy to study the structure of the composite. It has been established that the use of polypropylene fiber with the optimal reinforcement range from 1% to 3% allows us to achieve an improvement in the mechanical and physical characteristics of fiber foam concrete. The optimal dosage of the nanomodifier introduced instead of a part of the binder (10%) and polypropylene fiber (2%) by weight of the binder was determined. The maximum values of increments in mechanical characteristics were 44% for compressive strength and 73% for tensile strength in bending. The values of the thermal conductivity coefficient at optimal dosages of the nanomodifier and fiber decreased by 9%. The absence of microcracking at the phase boundary between the polypropylene fiber and the hardened cement–sand matrix due to nanomodification was noted.

show abstract

Section: Resultsmentioning

confidence: 99%

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Based on the transmission line principle [15,[19][20][21], when EM waves are incident perpendicular to the upper surface, the input wave impedance of each layer is as follows [17,22]. Where Z 0 ( Z 0 = µ 0 !…”

Section: The Design Of Multi-layer Absorbing Materialsmentioning

confidence: 99%

“…Computer aided technology can establish a database of materials and thicknesses and select the optimal ratio results from them. According to some literature, genetic algorithms (GA) [7][8][9], particle swarm optimization (PSO) [10][11][12], imitation based optimization (ISO) [13], winning particle optimization (WPO) [14], artificial bee colony (ABC) algorithm [15], etc. have been used to solve EM design problems [16].…”

Section: Introductionmentioning

confidence: 99%

“…Cheraghi et al [13] gather the EM parameters of 109 materials from different sources and the ISO was used to design an optimized tool for the best layer wave absorber, which can be used in various applications. Yildizel et al [15] designed a multi-layer microwave absorbing foam concrete (NMAFC) using ABC algorithm and the 4-layer MMAFC with 34.74 mm total thickness excessively satisfies the minimum requirement of 90% absorption in X band. However, due to the limitation of the thickness of cement-based materials, the complexity of their composition, and the randomness of their preparation, there are difficulties in designing cement-based EM wave absorbing materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization with a Genetic Algorithm for Multilayer Electromagnetic Wave Absorption Cement Mortar Filled with Expended Perlite

Xie

et al. 2023

J. Mater. Sci. Technol. Res.

View full text Add to dashboard Cite

Due to the complexity of the design of multilayer electromagnetic (EM) wave absorbing materials, it is difficult to establish the relationship between material parameters (type and filling ratios) and EM properties using traditional trial and error methods. Based on the measured EM parameters within a few materials and Boltzmann mixing theory, a database of EM parameters was thereafter built up. In this study, the genetic algorithm (GA) was used to design the multilayer wave-absorbing cement mortar. In order to verify this method, a multilayer mortar was fabricated and measured. The simulated and measured results are well consistent, which convincingly verifies computer-aided design. In addition, the optimized result expresses that the first layer as a matching layer guides EM waves into the interior of the material, while the other layers as absorption layers attenuate EM waves. The multilayer material may not meet the impedance gradient principle but still exhibits better EM wave absorption performance. The reflection loss (RL) of all optimized three layer sample is below –6.89 dB in the full frequency band and the minimum RL is –26.21 dB. This composite absorbing material and the GA method provide more design ideas for the design of future cement-based wave-absorbing materials and save a lot of time and material cost.

show abstract

“…With the development and application of foam concrete in many fields, its shrinkage cracking and poor mechanical strength have become obstacles. Therefore, extensive exploration has been carried out around performance optimization [ 9 , 10 , 11 , 12 , 13 ]. Numerous studies aimed at increasing the typically low compressive strengths associated with low density by the introduction of fly ash and recycled fine particles, or polymer fibers [ 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Chen

et al. 2022

Materials

View full text Add to dashboard Cite

The shield tunnel is a common solution for natural gas pipelines crossing rivers. Consequently, the development of natural gas tunnel filling materials with excellent performance is crucial to the safe operation and maintenance of pipelines. The foam concrete offers a reasonable solution. Nevertheless, since its inherent compressive strength decreases almost proportionally with the decrease in density, obstacles remain concerning obtaining the high density and relatively low strength required for natural gas tunnel filling. Here, a synergistic optimization strategy was proposed involving the orthogonal test, univariate control, and comprehensive balance method. It involves modifying the type and proportion of cementitious matrix, in particular by incorporating fly ash and PVA fibers in the mix design, and synergetic determining the best mix ratio from the aspects of compressive strength, stability, and dry density. The obtained foam concrete has a compressive strength of 4.29 MPa (FC4) and a dry density of 1060.59 kg/m3 (A11), which meets the requirements of pipeline pressure and pipeline anti-floating. This study is applied to the Yangtze River shield crossing project of the Sino-Russian Eastern Gas Pipeline, and ANSYS was used to simulate the stress and deformation of the foam concrete. This work provides an efficient foam concrete optimization mix scheme, and supports the application of foam concrete in the filling of the long-distance cross-river natural gas tunnels.

show abstract

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

Cited by 10 publications

References 40 publications

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

Insulation Foam Concrete Nanomodified with Microsilica and Reinforced with Polypropylene Fiber for the Improvement of Characteristics

Optimization with a Genetic Algorithm for Multilayer Electromagnetic Wave Absorption Cement Mortar Filled with Expended Perlite

Research on the Improving Performance of Foam Concrete Applied to the Filling of Natural Gas Pipeline Cross-River Tunnel

Contact Info

Product

Resources

About