• Title/Summary/Keyword: 흄

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A Study on the Compressive Strength Properties of the Ternary Blended Non-Cement Concrete using Ternary Diagram (삼각조성도를 통한 3성분계 무시멘트 콘크리트의 압축강도 특성 연구)

  • Jung, Yu-Jin;Kim, Young-Su
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.24 no.2
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    • pp.41-49
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    • 2020

  • To improve the problem of strength reduction of unary and binary blended non-cement concrete that occur at room temperature, comparative analysis was conducted based on the slump and compressive strength properties of ternary blended non-cement concrete in which cement was replaced with silica fume, fly ash, and blast furnace slag, and the following conclusions were drawn. The ternary blended non-cement concrete showed higher compressive strength than binary binder concrete, and the slump reduction was less when 10% silica fume was mixed. In addition, the appropriate composition ratio range of each by-product was suggested according to slump and compressive strength level based on ternary diagram.

  • https://doi.org/10.11112/jksmi.2020.24.2.41 인용 PDF KSCI

Thermal properties of silica fume-SiO2 based porous ceramic fabricated by using foaming method (직접 발포법을 이용해 제조된 실리카 흄-SiO2계 다공성 세라믹의 열적 특성)

  • Ha, Taewan;Kang, Seunggu;Kim, Kangduk
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.31 no.4
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    • pp.182-189
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    • 2021

  • Porous ceramics were manufactured using the foaming method for the development of inorganic insulating materials. Silica fume and SiO2 were used as main raw materials, and bentonite was used as a rapid setting agent for uniform structure formation of porous ceramics. The porous ceramics were sintered at 1200℃, and porosity, density, compressive strength, microstructure and thermal conductivity were analyzed. As the content of silica fume to SiO2 of the porous ceramics increased 70 to 90 %, the specific gravity increased from 0.63 to 0.69, and the compressive strength increased from 9.41 Mpa to 12.86 Mpa. But, the porosity showed a tendency to decrease from 72.07 % to 70.82 %, contrary to the specific gravity. As a result of measuring the thermal conductivity, the porous ceramic with a silica fume content of 70 % showed a thermal conductivity of 0.75 to 0.72 W/m·K at 25 to 800℃, respectively, and, another that a silica fume content of 90 % showed a 0.66~0.86 W/m·K. So the lower the silica f ume content, the lower the thermal conductivity, which was conf irmed to be consistent with porosity result. As a result of microstructure analysis using SEM (Scanning Electron Microscope), pores in the range of tens to hundreds ㎛ were observed inside and outside the porous ceramic, and it was confirmed that the pore distribution was relatively uniform.

  • https://doi.org/10.6111/JKCGCT.2021.31.4.182 인용 PDF KSCI HTML