Cement Based Composite Loaded with Medicinal Package Waste for Low Profile Electromagnetic Shielding

Suravarjhula, Venkat Kaushik; Manam, Sai Teja; Venkatesan, Jawahar; Alluri, SriCharan; Narayanan, B Sabarish

doi:10.1109/usnc-ursi.2018.8602658

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…The concept of Large Area Absorber (LAA) entails designing rugged, low cost, easily deployable electromagnetic absorbing solutions employing unconventional materials including cement, as replacement for conventional polymer and polyurethane based foam absorbers [1,2,5,7,8]. EMC solutions catering to IoT issues necessitate massive and fast deployment of conformal Large Area Absorbers.…”

Section: Electromagnetic Compatibility (Emc) Solutions For Iotmentioning

confidence: 99%

“…Engineered conductive fillers including grapheme, multi-walled carbon nano-tubes (MWCNT), graphite, taconite, carbon black, carbon fibres, and steel fibres are attractive candidates for enhancing the shielding properties of cement composites [1,2,7,8]. The emphasis on sustainable solutions has generated interest, in exploring industrial waste and byproducts including fly ash from thermal plants, medical package waste [5], and ash from steel industry [13], as conductive fillers. Important conclusion based on decade of research on enhancing EMI shielding properties of cement employing conductive fillers are [7] • Responsibility to realize sustainable solutions employing industrial waste and byproducts to reduce negative environmental impact caused by indiscriminate disposal.…”

Section: Cement Based Emc Solutionmentioning

confidence: 99%

“…Conventional EMI characterization of cement based composites requires large prototypes with measurements conducted in anechoic chambers or Open Area Test Site (OATS) [5,7], employing wideband horn antennas and associated instrumentation. The scenario is further complicated for lower frequencies with huge antenna sizes and subsequent increase in chamber dimensions.…”

Section: Requirement Of Fast Techniques To Characterize Absorption Lossmentioning

confidence: 99%

“…An entire gamut of materials ranging from fly ash from thermal plants, ash from steel industry, slags from copper smelter, carbon black, graphite, polystyrene beads have been investigated as conductive inclusions. Innovative fillers explored include CNTs [3], magnetitie gypsum plaster [4], medicinal package waste [5], and polymer based nano-composites [6]. Ocean of literature has been generated in this domain, exploring the effect of conductive fillers to enhance SE of cementitious composites [7].…”

Section: Introductionmentioning

confidence: 99%

“…Conventional SE measurement as per ASTM D-4935 mandates exposing the sample (cement mortar+conductive filler) to plane wave Transverse Electromagnetic Mode (TEM) scenario, necessitating huge sample sizes, broad band horns and anechoic chambers or Open Area Test Site (OATS) [5]. Guided wave techniques, conducted in laboratory scenario, to characterize microwave reflection/absorption properties of samples, thereby providing shielding effectiveness assessments, have been reported, to avoid sizable instrumentation required for plane wave scenario [6,8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fast Estimate of Plane Wave Attenuation of Conductive Powders for Rapid Deployment of Customized Cement Based Microwave Absorbing Solutions

Sabarish¹,

Jayakumar²

2021

PIER Letters

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Enhancing the electromagnetic absorption properties of pozzolanic cement provides scope for low cost realisation of frequency screened buildings. Electromagnetic wave attenuation attribute of conductive filler inclusions determines the absorption properties of filler loaded cement mortar. A transmission line based rapid measurement technique for the speedy estimate of microwave attenuation of conductive fillers is presented, providing quick approximates of cement mortar thickness for realizing customized absorption loss. Ash from three units of steel plant including EAF, AoD, and ARS units is investigated. Coaxial transmission line supports TEM propagation, hence is well suited for estimating plane wave characteristics. Ash filled coaxial transmission structures are subjected to scattering matrix measurements in the frequency range 800 MHz-4 GHz. Plane wave attenuation is estimated from the scattering matrix transfer coefficient (S 21). Ashes guarantee minimum 10 dB/m attenuation in the specified frequency range with ash from ARS unit providing loss over 50 dB/m. The database of customized cement mortar (composite) thickness for realizing varied absorption losses, incorporating ARS ash, is projected. The presented technique reduces the requirement of anechoic chambers, broad band horns, and liability of prototyping large mortar samples (all frequency dependent), for estimating shielding properties of conductive filler loaded cement mortar composites, over wide band Cement panels with customized absorption loss providing scope as low cost solution for managing device co-location issues encountered in evaluating EMI/EMC concerns is future IoT based systems.

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