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Title |
Durability Assessment of High Strength Concrete with High Volume Mineral Admixture
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Authors |
백철우(Chul-Woo Baek) ; 김훈상(Hoon-Sang Kim) ; 최성우(Sung-Woo Choi) ; 조현태(Hyun-Tae Jo) ; 류득현(Deug-Hyun Ryu) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.6.641 |
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Keywords |
다량의 광물질 혼화재 ; 내구성 ; 염화물 침투 저항성 ; 황산 및 황산염 침투 저항성 high volume mineral admixture ; durability ; chloride penetration resistance ; sulfuric acid and sulfate resistance |
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Abstract |
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 (H2SO4), 10% sodium sulfate (Na2SO4), and 10% magnesium sulfate (MgSO4) 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 C3A 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.
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