Electromagnetic Shielding Effectiveness of Nickel Fiber-Reinforced Cement Composites

Yao, Wei; Yang, Ying

doi:10.4028/www.scientific.net/msf.898.2065

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…EMI-absorbing concrete is more convenient than EM-reflecting concrete because the reflected wave may interact with the incident wave [ 291 , 292 ]. The electromagnetic shielding effectiveness of concretes with different chemical admixtures are given in Table 9 [ 271 , 293 , 294 , 295 , 296 , 297 , 298 , 299 , 300 , 301 , 302 , 303 , 304 , 305 ]. It can be observed from Table 9 that carbon-based materials are the main focused of electromagnetic shielding properties in concrete.…”

Section: Chemical Additives/admixturesmentioning

confidence: 99%

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

et al. 2021

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Supplementary cementitious materials (SCMs) and chemical additives (CA) are incorporated to modify the properties of concrete. In this paper, SCMs such as fly ash (FA), ground granulated blast furnace slag (GGBS), silica fume (SF), rice husk ash (RHA), sugarcane bagasse ash (SBA), and tire-derived fuel ash (TDFA) admixed concretes are reviewed. FA (25–30%), GGBS (50–55%), RHA (15–20%), and SBA (15%) are safely used to replace Portland cement. FA requires activation, while GGBS has undergone in situ activation, with other alkalis present in it. The reactive silica in RHA and SBA readily reacts with free Ca(OH)2 in cement matrix, which produces the secondary C-S-H gel and gives strength to the concrete. SF addition involves both physical contribution and chemical action in concrete. TDFA contains 25–30% SiO2 and 30–35% CaO, and is considered a suitable secondary pozzolanic material. In this review, special emphasis is given to the various chemical additives and their role in protecting rebar from corrosion. Specialized concrete for novel applications, namely self-curing, self-healing, superhydrophobic, electromagnetic (EM) wave shielding and self-temperature adjusting concretes, are also discussed.

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Section: Chemical Additives/admixturesmentioning

confidence: 99%

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

et al. 2021

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“…2) Wipe off the water on the surface of the test piece with a rag, and cover the surface of the test piece with a wet rag to prevent the water from evaporating [12].…”

Section: Orthogonal Test Of Glass Fiber Reinforced Cementmentioning

confidence: 99%

Application of Glass Fiber Reinforced Composite Materials in Construction Engineering

Chen¹,

Ueharo

2020

KEM

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Glass fiber reinforced cement (GRC) is a new type of composite material formed by using alkali-resistant glass fiber as a reinforcing material and cement paste or cement mortar as a matrix. GRC is widely used in construction engineering. However, the durability of GRC is still a major problem in engineering applications, especially GRC materials have been in the hot and humid building engineering environment for a long time. The alkaline environment of the cement matrix will cause serious erosion of the glass fiber, and Will significantly reduce the mechanical properties such as flexural strength and toughness of GRC. In this paper, ordinary Portland cement is mixed with active mineral admixtures such as fly ash and silica fume to reduce the alkaline environment of GRC matrix, and to delay the erosion rate of glass fiber and increase the flexural strength and compressive strength of GRC; At the same time, the effects of different hot and humid building engineering environments on the mechanical properties of GRC were studied.

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“…Another material that is promising with regard to microwave radiation absorption effectiveness is nickel [30]. It was shown in [31] that, owing to this material's high magnetic transformation temperature, a stable electromagnetic wave absorption capacity is achieved.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Properties and HPM Pulse Shielding Effectiveness of Cement-Based Composites

et al. 2023

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In today’s world, protection against electromagnetic waves, including high-power microwave (HPM) pulses, is becoming increasingly important. Hence, the aim of this research was to select an absorbing admixture, which, when used in an appropriate quantity, improves the effectiveness of shielding against electromagnetic waves and, at the same time, satisfies the requirements that are important from a construction engineering point of view. Altogether, eighteen admixtures (including two types of fibers), added in different quantities, and three types of aggregate have been tested. The compressive and flexural strength test results show that the greatest improvement in the tested mechanical properties was achieved in the case of admixtures such as steel fibers, carbon black P803, ferrite, and fly ash. Regarding the effect of the admixtures on shielding effectiveness, the best results were obtained for graphite in the form of flakes, graphite in the form of powder, carbon black N990 and P803, polypropylene and steel fibers, and hybrid admixtures, i.e., ashporite aggregate with carbon black and ashporite aggregate with graphite flakes. Regarding both mechanical properties and HPM pulse shielding effectiveness, the best effects were achieved in the case of the specimens with a high steel fiber content.

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Electromagnetic Shielding Effectiveness of Nickel Fiber-Reinforced Cement Composites

Cited by 12 publications

References 13 publications

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Review of the Effects of Supplementary Cementitious Materials and Chemical Additives on the Physical, Mechanical and Durability Properties of Hydraulic Concrete

Application of Glass Fiber Reinforced Composite Materials in Construction Engineering

Evaluation of Mechanical Properties and HPM Pulse Shielding Effectiveness of Cement-Based Composites

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