Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Estimation of Shrinkage Behavior and Stress of Expansive Concrete on Buildings

실부재에 있어서의 팽창콘크리트의 수축거동 및 응력예측

  • Choi, Hyeong-Gil (Graduate School of Engineering, Muroran Institute of Technology) ;
  • Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam National University) ;
  • Noguchi, Takafumi (Department of Architecture, The University of Tokyo) ;
  • Hama, Yukio (Graduate School of Engineering, Muroran Institute of Technology)
  • Received : 2015.04.30
  • Accepted : 2015.09.14
  • Published : 2016.02.29
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, Based on the constructed model in advance, we suggested the macro prediction method of shrinkage cracking reduction in concrete using expansive additives, and the method was verified. In addition, extended application of model to building, the strain of walls and slabs on building was estimated by model and the generated stress was estimated thereby comparing this with the result by existing method to verify the model's applicability and the validation of our model. From examination of theoretical model for concrete using expansive additives to examination for building levels, furthermore suggests the macro prediction method for shrinkage reduction and cracking control effects was can be supply practical data in application of expansive concrete and utility in the future.

수축 균열의 저감 대책으로서 팽창재를 적용한 콘크리트의 모델화에 관한 연구로서 선행하여 구축한 모델을 바탕으로 팽창재에 의한 콘크리트의 수축저감 및 균열억제 효과에 대한 매크로 예측 수법을 제안하고 타당성을 검증했다. 또한, 모델의 적용을 실부재로 확장해, 실부재에 발생하는 변형을 예측하는 한편, 실부재에 발생하는 응력을 예측하여, 기존의 방법에 따른 결과와 비교 검토함으로서 본 연구에서 제안하는 모델의 타당성을 검증했다. 본 연구로부터 실시한 팽창재를 혼입한 콘크리트에 대한 이론적인 모델의 검토로부터 팽창콘크리트의 실구조물 레벨로의 검토와 함께 수축저감 및 균열억제 효과에 대한 매크로 예측수법의 제안은 향후, 팽창콘크리트의 적용 및 실용화에 있어, 실증적인 데이터를 제공할 수 있다고 생각한다.

Keywords

References

  1. Architectural Institute of Japan, "Recommendations for Practice of Crack Control in Reinforced Concrete Buildings (Design and Construction)", AIJ, 2006.
  2. Japan Concrete Institute, "Research committee report on shrinkage of concrete", 2010.
  3. Choi, H. G., "A Study on the Macro Prediction of Shrinkage-Reduction Behavior in Concrete using Expansive Additives", PhD thesis, 2013, University of Tokyo, Tokyo, Japan.
  4. Choi, H. G., Choi, H. S., and Lim, M. K., Noguchi, T., and Kitagaki, R., "Modeling of volume changes of concrete mixed with expansive additives", Construction and Building Materials, 2015, 75, pp.266-274. https://doi.org/10.1016/j.conbuildmat.2014.11.003
  5. Choi, H. G., Lim, M. K., Choi, H. S., Noguchi, T., and Kitagaki, R., "Modeling of creep of concrete mixed with expansive additives", Magazine of Concrete Research, 2015, Vol.67, No.7, pp.335-348. https://doi.org/10.1680/macr.14.00249
  6. Choi, H. G., Tsujino, M., Kitagaki, R., and Noguchi, T., "Expansion-Contraction Behaviors and Cracking Control Effects of Expansion Concrete in Buildings", The 5th International Conference of Asian Concrete Federation, 2012, ACF2012-0096, Session3-2.
  7. Hayano, H., Maruyama, I., Noguchi, T., and Tochigi, T., "Evaluation of cracking potential of high-strength concrete induced by autogeneous shrinkage under the quasi-complete restraint condition", Journal of Structural and Construction Engineering, 2008, Vol.73, No.623, pp.19-26. https://doi.org/10.3130/aijs.73.19
  8. Shiraishi, R., Nakayama, H., Takao, N., and Gotoh, T., "Effects of type of cement, admixture and aggregate on the thermal expansion coefficient of hardened cement pastes and concretes", Research paper of Mitsubishi Materials Corporation Cement Research Institute, 2010, No.11, pp.33-40.
  9. Neville, A. M., Dilger, W. H., and Brooks, J. J., "Creep of plain and structural concrete", Consrjtruction Press, Longman, 1983, pp.246-263.
  10. Noguchi, T., and Tomosawa, F., "Relationship between compressive strength and various mechanical properties of high strength concrete", Journal of Structural and Construction Engineering, 1995, No.472, pp.11-16.
  11. Mitani, Y., Tanimura, M., Matsumoto, K., and Satake, S., "Evaluation Method of Restrained Stress of Expansive Concrete under Mass Curing Temperature Hysteresis and Its Verification : Part2 Modeling of Material Model", Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan, 2006, pp.217-218.
  12. Momose, H., Kanda, T., Ishida, M., and Sakuramoto, F., "A study on resistance against cracking of concrete using expansive admixture and shrinkage reducing admixture", Journal of Structural and Construction Engineering, 2011, Vol.33, No.1, pp.557-562.
  13. Hashida, H., Kikuchi, T., Mochida, Y., and Hirai, Y., "Evaluation for strain behaviour and stress of reinforced concrete member with expansive concrete", Proceedings of the Japan Concrete Institute, 2011, Vol.33, No.1, pp.557-562.