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Hydration of High Volume Mineral Admixtures Binder with Kind of Activators

자극제 종류에 따른 혼화재 대량사용 결합재의 수화분석

  • Received : 2012.07.05
  • Published : 2012.10.25

Abstract

As the increase of concern for global warming, high volume mineral admixtures(HVMA) concrete for the reduction of carbon dioxide which is occurred production of cement has low cement, it is reported that use of inorganic activators for increase of compressive strength. As use of high content of mineral admixtures, since the matrix is different to hydration of normal cement, it was evaluated properties of microstructure of high volume mineral admixtures paste with kind of inorganic activators. The methods of hydration analysis were micro hydrate heat, x-ray diffraction, TG-DTA and scanning electron microscope image. The hydrate properties of paste with kind of activators are as follows. At the micro heat of hydration, the peak approach time of CSA and lime were rapid, and it is judged that the setting of matrix is rapid. But anhydrous gypsum was later than plain due to sulfur trioxide. The result of XRD, it was highly observed ettringite, calcium hydroxide and mono sulfate at blended activators than use of single activator. In the TG-DTA of matrix, it was confirmed that creation of hydrate according to the change of mass by thermal gravity and change of calorie by differential thermal analysis with particular temperature. Especially, the calcium hydroxide which was disassembled at $450^{\circ}C$ was possible to quantitative analysis in accordance with mixtures and ages respectively. The observation result of SEM image, it was shown calcium hydroxide, ettringite, C-S-H gel, and C-A-H gel etc., but the tendency of hydrates were not clear for the reason of low cement content. Therefore, focused on result of hydrate analysis of HVMA binder with kind of inorganic activators, it was judged that the hydrate results were usefulness to basic data for mixtures design and evaluation properties of HVMA concrete hereafter.

Keywords

Acknowledgement

Supported by : 국토해양부

References

  1. Zhang Y. M. et al, Hydration of High-Volume Fly Ash Cement Pastes, Cement and Concrete Composites, vol.22 iss.6, pp.445-452, 2000. https://doi.org/10.1016/S0958-9465(00)00044-5
  2. Wang X. Y. et al, Modeling the Hydration of Concrete Incorporating Fly Ash or Slag, Cement and Concrete Research, vol.40 iss.7, pp.984-996, 2010. https://doi.org/10.1016/j.cemconres.2010.03.001
  3. Jiang L. et al, Studies on Hydration in High-Volume Fly Ash Concrete Binders, ACI Materials Journal, vol.96 no.6, pp. 703-706, 1999.
  4. Hill J. et al, The Mineralogy and Microstructure of Three Composite Cements with High Replacement Levels, Cement and Concrete Composites, vol.24 iss.2, pp.191-199, 2002. https://doi.org/10.1016/S0958-9465(01)00041-5
  5. 문경주, 소승영, 소양섭, "무기계 산업폐기물을 자극제로 이용한 비소성 시멘트의 수화반응", 한국콘크리트학회 논문집, vol.18 no.2, pp.267-274, 2006. 4.
  6. 이한승, "자극제 종류 및 양생온도에 따른 알칼리 활성화 슬래그 모르타르의 강도특성에 관한 실험적 연구", 한양대학교대학원 석사학위논문, pp.28-29, 2006. 8.
  7. 이영재 외, "알칼리 활성화 슬래그 콘크리트의 적용에 관한 실험적 연구", 대한건축학회논문집, 제23권 2호, pp.99-106, 2007. 2.
  8. 荒井 康夫 著, 장복기, 정창주, 이종호, 임용무 譯, "시멘트 材料化學", 광주:전남대학교 출판부, p.220, 1998. 11.
  9. 송태협, "CSA를 사용한 플라이애쉬 콘크리트의 초기강도 개선에 관한 연구", 건국대학교 대학원 박사학위 청구논문, 2005. 2.
  10. 조형규 외, "미소수화 열량계를 이용한 혼합시멘트의 수화모델 검증에 관한 연구", 대한건축학회 학술발표대회논문집, 제30권 1호, pp.201-202, 2010. 10.
  11. 기초소재주식회사, "고로슬래그 미분말을 사용한 재생골재 콘크리트의 특성", 건기연 2005-047, pp.73-80, 2006. 6.