Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Development of Reduction Methods of Thermal Stresses Due to Hydration Heat

수화열에 의한 균열 저감 공법에 관한 연구

  • 양주경 (청운대학교 철도행정토목학과)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a program for simulating hydration heat and stresses was developed. And an effective methods were proposed for reduction of hydration heat stresses using flyash and steel fiber. It was shown that flyash replacement made reduction of peak temperature due to hydration heat. However, the effectiveness of reduction of tensile stress was not as good as it of peak temperature. Not only peak temperature but also tensile stress were reduced by the addition of steel fiber.

본 연구에서는 외기 온도의 변화를 반영하여 수화열에 의한 열전달 및 열응력 해석이 가능한 프로그램을 개발하고, 재료적 측면에서 수화열에 의한 균열 발생 가능성을 최소화하기 위하여 제5종포틀랜드시멘트를 사용하는 경우, 제5종포틀랜드시멘트와 플라이애쉬를 같이 사용하는 경우, 제5종포틀랜드시멘트와 강섬유를 같이 사용하는 경우를 실험하여 비교 검토하였다. 플라이애쉬를 대체하여 사용하면 콘크리트의 최고 온도를 낮추는 효과를 기대할 수 있지만, 인장응력의 감소 효과는 온도의 감소 효과만큼 크게 나타나지 않았다. 또한 강섬유를 혼입하여 사용하면 온도 및 인장응력의 저감 측면에서 매우 효과적인 것으로 나타났다.

Keywords

References

  1. ACI Committee 207(1993), "Cooling and Insulating Systems for Mass Concrete", (ACI 207.4R-93), ACI, Detroit, 22pp.
  2. ACI Committee 207(1994), "Mass Concrete", ACI Manual of Concrete Practice, part 1, 207.1, pp. 21.
  3. 塚山陸一(昭和 49년), "マツシフ‶鐵筋コンクリ-トの溫度上昇ならひ‶に溫度ひひ‶割れに關する基礎硏究", 東大學位論文.
  4. 日本コクリ-ト工學協會(1982), "マスコクリ-トの溫度應力發生メカニズムに 關すコロキウム", pp.112.
  5. 社團法人 日本コンクリ-ト工學協會(1985), "マスコンクリ-トの 溫度應力硏究委員會報告書", pp. 5-9.
  6. 小澤章三(1962), "マスコンクリ-トの 初期ひひ‶割 れとそ防止對策に關する硏(I)", 發電水力, No. 57.
  7. Nurse, R.W.(1949), "Steam Curing of Concrete", Magazine of Concrete Research, Vol. 1, No. 2, pp. 79-88. https://doi.org/10.1680/macr.1949.1.2.79
  8. Saul, A.G.A.(1951), "Principles Underlying the Steam Curing of Concrete at Atmospheric Pressure", Magazine of Concrete Research, Vol. 2, No. 6, pp. 127-140. https://doi.org/10.1680/macr.1951.2.6.127
  9. Bergstrom, S.G.(1953)., "Curing Temperature, Age and Strength of Concrete", Magazine of Concrete Research, Vol. 5, No. 14, pp. 61-66. https://doi.org/10.1680/macr.1953.5.14.61
  10. Plowman, J.M.(1956), "Maturity and the Strength of Concrete", Magazine of Concrete Research, Vol. 8, No. 22, pp. 13-22. https://doi.org/10.1680/macr.1956.8.22.13
  11. Chin, F. K.(1971), "Relation between Strength and Maturity of Concrete", ACI J., Vol. 68, No. 3, pp. 196-203.
  12. Carino, N.J., Lew, H.S., and Volz, C.K.(1983), "Early Age Temperature Effects on Concrete Strength Prediction by the Maturity Method", ACI Journal, V.80, No.10, March-April, pp. 93-101.
  13. 大崎幸雄 外(1985), "溫度ひびわれ發生危險度の簡易豫測手法", 間組硏究年報, pp.99-108.
  14. Bangash, Y., and England, G.L.(1980), "The Influence of Thermal Creep on the Operational Behavior of Complex Structure", International Conference on Fundamental Creep and Shrinkage, Lausanne, Switzerland.
  15. Bangash, Y., M.Y.H.(1989), "Concrete and Concrete Structures : Numerical Modeling and Applications", Elsevier Applied Science.