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고성능 콘크리트의 재령에 따른 강도 및 내구성능 발현 특성 KCI 등재

Strength Development and Durability of High Performance Concrete with Age

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한국도로학회논문집 (International journal of highway engineering)
한국도로학회 (Korean Society of Road Engineers)
초록

PURPOSES: The objective of this study is to evaluate the properties of high-performance concrete and compare them with the properties of ternary blended cement (OPC 60% : BFS 30% : FA 10%) as applied to all-in-one bridge decks. High-performance concrete modified with styrene-butadiene latex (SB latex) was evaluated for strength development and durability through its compressive strength and chloride ion diffusion coefficient.
METHODS: The compressive strength test was conducted according to KS F 2405, and the average value of the three specimens was used as the result at each stage. The chloride ion diffusion test was performed at 28 days, 56 days, and 365 days according to NT BUILLD 492. The chloride ion penetration test was conducted according to ASTM C 1202.
RESULTS: For the compressive strength of the high-performance concrete, the blast furnace slag 40% replacement (BFS40) mixture had the most similar results to those of the ternary blended cement. The BFS40 mixture exhibited a lower compressive strength at 3 days than the latex modified concrete (LMC) mixture used for the bridge deck pavement, whereas it exhibited a 3.7-9.8% higher compressive strength at 7 days. In addition, the BFS40 mixture had the lowest diffusion coefficient, which was 49.1~59.0% lower than that of the LMC mixture. Mixing with latex tended to decrease in charge passed compared to Plain which is only used ternary blended cement, and showed excellent watertighness (rated “very low”), which is lower than 1,000 coulombs in all mixtures with latex.
CONCLUSIONS : The BFS40 mixture exhibited excellent compressive strength, chloride ion permeability resistance, and the lowest chloride ion diffusion coefficient although it included a small amount of latex, which makes it more expensive than the current LMC mixture. It is believed that it is possible to secure excellent economic efficiency and durability by using lesser latex than that in the LMC mixture and using a mixture of the blast furnace slag instead.

목차
ABSTRACT
 1. 서론
 2. 본론
  2.1. 실험계획
  2.2. 실험결과 및 고찰
 3. 결론
 REFERENCES
저자
  • 박성기(㈜콘텍이엔지) | Park Sungki
  • 오리온(㈜콘텍이엔지) | Oh Rion
  • 백철우(유진기업(주) 기술연구소) | Baek Chulwoo
  • 류득현(유진기업(주) 기술연구소) | Ryu Deukhyun
  • 이수진(건국대학교 아시아시설물연구센터) | Lee Sujin
  • 김황희(㈜콘텍이엔지 기술연구소) | Kim Hwanghee Corresponding Author