Author
Hyeong-Ki Kim
Other affiliations: KAIST
Bio: Hyeong-Ki Kim is an academic researcher from Chosun University. The author has contributed to research in topics: Compressive strength & Cement. The author has an hindex of 28, co-authored 76 publications receiving 2371 citations. Previous affiliations of Hyeong-Ki Kim include KAIST.
Topics: Compressive strength, Cement, Bottom ash, Mortar, Fly ash
Papers
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TL;DR: In this paper, a qualitative analysis using SEM images was carried out to observe the surface morphology and microstructure of cement composites with different amounts of silica fume and CNT addition.
277 citations
TL;DR: In this paper, the effects of lightweight aggregates and entrained air on the flow characteristics, density, porosity, compressive strength, and dynamic elastic modulus of the concrete were investigated.
251 citations
TL;DR: In this article, experiments have been carried out to evaluate the utilization of bottom ash (byproduct of power plant) as fine and coarse aggregates in high-strength concrete with compressive strength of 60-80 MPa.
214 citations
TL;DR: In this paper, the authors investigated the piezoresistive sensitivity and stability of CNT/cement mortar composites with low water-binder ratio and the effect of absorbed water on the composites was also investigated.
169 citations
TL;DR: In this paper, the characteristics of microbiological precipitation of calcium carbonate on normal and lightweight concrete by two types of bacteria, Sporosarcina pasteurii and Bacillus sphaericus, were investigated.
117 citations
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TL;DR: Recent progress in synthesis, characterization, processing and application of polyaniline (PANI) with the focus on the period 2010-2012 is reviewed in this paper, where new insights in the mechanism of formation of molecular/supramolecular PANI structures are discussed.
627 citations
TL;DR: In this article, the effect of incorporating nanomaterials in low dosages to the fabrication, workability, hydration, microstructure, and mechanical properties of cement-based composites are comprehensively reviewed.
512 citations
TL;DR: In this paper, a multilayer graphene/polymer composite films with good mechanical flexibility were fabricated into paraffin-based sandwich structures to evaluate electromagnetic interference (EMI) shielding.
471 citations
TL;DR: Besides the excellent high-temperature mechanical properties, Si3N4 and SiC based ceramics containing insulating or electrically conductive phase are attractive for their tunable dielectric propert...
Abstract: Besides the excellent high-temperature mechanical properties, Si3N4 and SiC based ceramics containing insulating or electrically conductive phase are attractive for their tunable dielectric propert...
466 citations
TL;DR: In this paper, a self-assembled spongelike (S) ultralight (ρ ≈ 140 mg cm−3) aerogel was fabricated through polypyrrole (PPy) and reduced graphene oxide (RGO).
Abstract: A self-assembled spongelike (S) ultralight (ρ ≈ 140 mg cm−3) aerogel was fabricated through polypyrrole (PPy) and reduced graphene oxide (RGO). First, the dispersed graphene oxide (GO) was locked homogeneously in those chains formed by the gelation of PPy. Then, a hydrothermal process was employed to reduce GO to RGO. With a trace content of RGO (0.43 wt% in aerogel), the electromagnetic absorption (EA) performance had been significantly improved. Only with a very low filler loading (10 wt%), the S-PPy/RGO aerogel based composite could reach an effective EA bandwidth (below −10 dB) of 6.76 GHz, and the highest reflection coefficient reached −54.4 dB at 12.76 GHz. It was demonstrated that this aerogel material can be considered as an effective route to design a lightweight and high performance EA material. Furthermore, the S-PPy/RGO aerogel also showed a suitable pollution treatment performance with different solvents and dyes.
360 citations