A Experimental Study on the Reduction of Shrinkage of High Performance Concrete

고성능 콘크리트의 수축저감에 관한 실험적 연구

Koh, Kyung-Taek;Park, Jung-Jun;Kim, Sung-Wook;Lee, Jang-Hwa
고경택;박정준;김성욱;이장화

  • Published : 2004.05.31

Abstract

Generally, high performance concrete has characteristics such as low water-cementitious material ratio, lots of unit binder powder, thus the heat of hydration, drying cracking and autogenous shrinkage are tend to be increased. This study is to investigated the effect of the expansive additive and shrinkage reducing agent on the drying shrinkage and autogenous shrinkage of high performance concrete as a study to develop the reduction technology of shrinkage of the concrete. Test results showed that the expansive additive and shrinkage reducing agent were effective the reduction of drying shrinkage and autogenous shrinkage of high performance concrete. Especially, the using method in combination with expansive additive and shrinkage reducing agent was more effective than the separately using method of that.

고성능 콘크리트는 물-결합재비를 작게하고, 단위 결합재량을 다량으로 사용하므로 콘크리트의 수화열, 건조수축 및 자기수축이 증대되는 경향이 있다 본 연구에서는 고성능 콘크리트의 수축저감 기술을 구축하는 연구의 일환으로서 팽창재와 수축저감제 사용이 고성능 콘크리트의 건조수축 및 자기수축에 미치는 영향을 검토하였다. 그 결과, 팽창재와 수축저감제는 고성능 콘크리트의 건조수축 및 자기수축을 저감하는데 효과가 뛰어나며, 특히 팽창재와 수축저감제를 병용하여 사용할 경우, 각각 단독으로 사용하는 경우보다는 수축저감 효과가 크며, 수축저감에 대한 상승효과가 있음을 알 수 있었다.

Keywords

References

  1. 대한토목학회논문집 v.23 no.6A 광물질 혼화재료를 사용한 고성능 콘크리트의 수축특성 고경택;박정준;이종석;김성욱
  2. 2002년도 학술발표회 고성능콘크리트의 자기수축 저감에 관한 연구 김성욱;박정준;고경택;이종석;이장화
  3. 한국콘크리트학회 논문집 v.11 no.1 CSA계 팽창재 및 무기질 혼화재를 이용한 고성능 콘크리트의 특성에 관한 연구 한천구;반호용;전병채;홍상희
  4. コンクリ-ト工學年次論交集 v.22 no.2 セメント系膨脹材を混和したセメントの水和反應と膨脹機構 近藤直孝;大門正機
  5. セメント?コンクリ-ト論文集 no.52 カルシウムサルホアルミネ-ト系膨脹材の水和におよほす$C_3$Aと二水セッコウの影響 盛岡實;秋原宏俊;大門正機
  6. コンクリ-トの自己收縮硏究委員會報告書 自己收縮硏究委員
  7. Proceedings of Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete New development in shrinkage-reducing admixtures;ACI SP-173 Berke, N.S.;Dallarire, M.P.;Hicks, M.C.;Kerkar, A.
  8. Proceedings of the 4th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete The influence of mix composition on mechanical properties of high-performance silica-fume concrete;ACI SP-132 De Larrard, F.;Le Roy, R.
  9. Role of expansive admixtures in high-performance concrete, High-Performance Concrete : Research to Practice, ACI SP-189 Enyi, C.;Huizhen, L.
  10. ACI Materials Journal v.93 no.6 Autogenous deformation and change of the relative humidity in silica fume modified cement paste Jensen, O.M.;Hansen, P.E.
  11. Cement and Concrete Composite no.20 Expansive admixture(mainlyettringite) Nagataki, S.;Gomi, H.
  12. ACI Materials Journal v.89 no.3 Effects of shrinkage-reducing admixtures on restrained shrinkage cracking of concrete Shah, S.P.;Karaguler, M.E.;Sarigaphuti, M.
  13. Cement and Concrete Research v.25 no.8 Experimental study on mechanism of autogenous shrinkage of concrete Tazawa, E.;Miyazawa, M.