• Title/Summary/Keyword: EUGENE

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Mechanical Properties of High Strength Concrete with High Volume Mineral Admixture (다량의 혼화재를 사용한 고강도 콘크리트의 역학적 특성)

  • Baek, Chul-Woo;Park, Cho-Bum;Choi, Sung-Woo;Jo, Hyun-Tae;Ryu, Deuk-Hyun
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.2 no.3
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    • pp.180-187
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    • 2014

  • The purpose of this study is to evaluate on the mechanical properties of High Volume Mineral Admixture(HVMA) high strength concrete to reduce the amount use of Ordinary Potland Cement, to discover the optimized HVMA binder and to test HVMA concrete based on the change of W/B and curing temperature. The results were shown as follows: The HVMA binder using the mixture of combined heat power plant fly ash and anhydrous gypsum known as inorganic activators with the mixture of blast furnace slag and fly ash was optimized. The mixture of HVMA high strength concrete at 26% of W/B ratio had a good result on flow characteristic and mechanical properties. High strength HVMA concrete over 50MPa is possibly manufactured over curing temperature $20^{\circ}C$.

  • https://doi.org/10.14190/JRCR.2014.2.3.180 인용 PDF KSCI

Durability Assessment of High Strength Concrete with High Volume Mineral Admixture (다량의 광물질 혼화재를 사용한 고강도 콘크리트의 내구성 평가)

  • Baek, Chul-Woo;Kim, Hoon-Sang;Choi, Sung-Woo;Jo, Hyun-Tae;Ryu, Deug-Hyun
    • Journal of the Korea Concrete Institute
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    • v.27 no.6
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    • pp.641-649
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    • 2015

  • The purpose of this study was to assess the durability of high-strength concrete with high volume mineral admixture (HVMAC) derived from previous studies within ternary blended concrete (TBC) and normal concrete (NC). Four durability evaluation types such as chloride penetration resistance, freezing and thawing resistance, carbonation resistance in two pre-treatment conditions, and sulfuric acid and sulfate resistance using 5% sulfuric acid ($H_2SO_4$), 10% sodium sulfate ($Na_2SO_4$), and 10% magnesium sulfate ($MgSO_4$) solution were selected and performed in this study. HVMAC showed the excellent chloride penetration resistance in any age and the freezing and thawing durability close to 100%. In addition, HVMAC affected more reduction in carbonation resistance than TBC. When the curing time was increased, to create a concrete internal organization densely improved resistance to carbonation. HVMAC also showed the most superior in sulfuric acid and sulfate resistance. As the reduction of calcium hydroxide and $C_3A$ to apply a large amount of admixture reduced the swelling and cracking of concrete, the strength reduction and mass change of concrete was found to be small indicated.

  • https://doi.org/10.4334/JKCI.2015.27.6.641 인용 PDF KSCI