콘크리트학회논문집 (Journal of the Korea Concrete Institute)

  • 제27권4호
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  • Pages.343-351
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  • 2015
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  • 1229-5515(pISSN)
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  • 2234-2842(eISSN)
한국콘크리트학회 (Korea Concrete Institute)
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Rice Husk Ash와 실리카퓸을 혼입한 초기재령 콘크리트의 내구성능 평가

Durability Performance Evaluation On Early-Aged Concrete with Rice Husk Ash and Silica Fume

  • ;
  • 권성준 (한남대학교 건설시스템 공학과)
  • Saraswathy, Velu (Corrosion Protection Division, Central Elctro Chemical Research Institute) ;
  • Kwon, Seung-Jun (Dept. of Civil Engineering, Hannam University)
  • 투고 : 2014.07.25
  • 심사 : 2015.04.29
  • 발행 : 2015.08.30
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초록

최근들어 $CO_2$ 증가에 따른 사회적, 공학적 문제가 증가하면서 시멘트 사용량을 줄이려는 연구가 진행되고 있다. 플라이 애쉬, 고로 슬래그, 실리카퓸 등의 혼화재료가 시멘트 대체재로 많이 사용되고 있는데, 최근 들어 Rice Husk Ash (RHA)를 혼화재료로 사용하여 콘크리트의 성능을 개선시키려는 연구가 활발하게 진행 중이다. 본 연구에서는 RHA와 가장 뛰어난 혼화재료로 알려진 실리카퓸을 혼입한 콘크리트를 제조하여 초기재령 콘크리트에 대한 염해저항성을 평가하였다. 이를 위해 10~30%의 RHA 치환률과 2~8%의 실리카퓸 치환률을 가진 콘크리트를 제조하여, 역학적 실험과 밀도, 공극률, 염화물 확산계수, 부식전류 측정등의 내구성 실험을 수행하였다. RHA 10~15% 수준의 치환은 SF 2~4% 수준보다 초기재령 콘크리트에서의 높은 강도 및 염해저항성을 확보하였으며, 미래에 유용하게 사용될 수 있는 혼화재료의 가능성을 나타내었다.

Currently, lots of researches have been performed for reducing cement usages due to increasing social/engineering problems caused by $CO_2$ emission. Supplementary cement materials like fly ash, slag, and silca fume are usually employed for cement replacement, and nowadays rice husk ash (RHA) is widely studied for enhancement of concrete performance as mineral admixture. In this paper, concrete samples with RHA and SF which is known for its engineering advantages are prepared and a resistance to chloride attack is evaluated in early-aged concrete. For the work, replacement ratios of 10~30% for RHA concrete and 2~8% for SF concrete are considered, and various durability tests such as density, void, sorptivity, current measurement, and chloride diffusion coefficient are performed including mechanical test like compressive and tensile strength. Replacement of RHA 10~15% shows better improvement of corrosion resistance and strength than that of SF 2~4% and normal concrete, which shows a strong applicability for utilization as construction materials.

키워드

참고문헌

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피인용 문헌

  1. Effects of Silica Fume Content and Polymer-Binder Ratio on Properties of Ultrarapid-Hardening Polymer-Modified Mortars vol.10, pp.2, 2016, https://doi.org/10.1007/s40069-016-0136-9