Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지
DOI QR코드

DOI QR Code

Evaluating Early Age Shrinkage Behavior of Ultra High Performance Cementitious Composites (UHPCC) with CSA Expansive Admixture and Shrinkage Reducing Agent

CSA계 팽창재 및 수축 저감제의 혼입에 따른 UHPCC의 초기 수축 거동 평가

  • Yoo, Doo-Yeol (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Park, Jung-Jun (Structural Engineering & Bridges Research Division Infrastructure Research Dept., Korea Institute of Construction Technology) ;
  • Kim, Sung-Wook (Structural Engineering & Bridges Research Division Infrastructure Research Dept., Korea Institute of Construction Technology) ;
  • Yoon, Young-Soo (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 류두열 (고려대학교 건축사회환경공학부) ;
  • 박정준 (한국건설기술연구원 구조교량연구실) ;
  • 김성욱 (한국건설기술연구원 구조교량연구실) ;
  • 윤영수 (고려대학교 건축사회환경공학부)
  • Received : 2011.01.10
  • Accepted : 2011.04.19
  • Published : 2011.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, experimental tests of chemical and autogenous shrinkage were performed to evaluate the early age shrinkage behaviors of ultra high performance cementitious composites (UHPCC) with various replacement ratios of silica fume (SF), shrinkage reducing agent (SRA), expansive admixture (EA), and superplasticizer (SP). Starting time of self-desiccation, was analyzed by comparing the setting times and the deviated point of chemical and autogenous shrinkage strains. The test results indicated that both SF and SRA augment the early age chemical shrinkage, whereas SP delays the hydration reaction between cement particles and water, and reduces chemical shrinkage. About 49% of autogenous shrinkage was depleted by synergetic effect of SRA and EA. The hardening of UHPCC was catalyzed by containing EA. Self-desiccation of UHPCC occurred prior to the initial setting due to the high volume fraction of fibers and low water-binder ratio (W/B).

이 연구에서는 실리카퓸 및 수축 저감제, 팽창재, 고성능 감수제의 혼입을 변수로 한 초고성능 시멘트 복합체(UHPCC)의 초기 수축 거동을 평가하기 위하여 화학수축 및 자기수축 실험을 수행하고, 응결 측정 결과와 비교하여 UHPCC의 자기건조 시작 시점에 대하여 분석하였다. 실험 결과, 실리카퓸 및 수축 저감제는 초기 화학수축을 증가시키는 경향을 보였으며, 고성능 감수제는 시멘트와 배합수의 수화 반응을 지연시키고 화학수축을 저감시키는 것으로 나타났다. 수축 저감제와 팽창재를 조합하여 적용한 경우 약 49%의 자기수축 저감 효과를 보였으며, 팽창재는 경화를 촉진 시키는 것으로 나타났다. 또한 UHPCC는 다수의 섬유 혼입과 낮은 물-결합재비에 의해 초결 이전부터 자기건조 현상이 발생하는 것으로 나타났다.

Keywords

References

  1. 김성욱, 강수태, 한상묵, "초고성능 시멘트 복합재의 특성 및 활용 현황," 콘크리트학회지, 18권, 1호, 2006, pp. 16-21.
  2. Japan Concrete Institute, "Committee Report, Autogenous Shrinkage of Concrete," E. Tazawa Eds., E&FN Spon, 1999, pp. 3-62.
  3. Maltese, C., Pistolesi, C., Lolli, A., Bravo, A., Cerulli, T., and Salvioni, D., "Combined Effect of Expansive and Shrinkage Reducing Admixtures to Obtain Stable and Durable Mortars," Cement and Concrete Research, Vol. 35, No. 12, 2005, pp. 2244-2251. https://doi.org/10.1016/j.cemconres.2004.11.021
  4. 한천구, 김성욱, 고경택, 한민철, "팽창재와 수축 저감제를 조합 사용한 고성능 콘크리트의 기초 물성 및 수축 특성," 콘크리트학회 논문집, 16권, 5호, 2004, pp. 605-612.
  5. Bentz, D. P., "Influence of Shrinkage-Reducing Admixtures on Early-Age Properties of Cement Pastes," Journal of Advanced Concrete Technology, Vol. 4, No. 3, 2006, pp. 423-429. https://doi.org/10.3151/jact.4.423
  6. 윤성원, 노재성, "산업폐기물을 이용한 CSA계 팽창재 제조 및 응용," 콘크리트학회 논문집, 16권, 3호, 2004, pp. 369-374. https://doi.org/10.4334/JKCI.2004.16.3.369
  7. Tennis, P. D. and Jennings, H. M., "A Model for Two Types of Calcium Silicate Hydrate in the Microstructure of Portland Cement Pastes," Cement and Concrete Research, Vol. 30, No. 6, 2000, pp. 855-863. https://doi.org/10.1016/S0008-8846(00)00257-X
  8. Tazawa, E., Sato, R., Sakai, E., and Miyazawa, S., "Work of JCI Committee on Autogenous Shrinkage," Shrinkage of Concrete, Shrinkage 2000, Proceedings of the International RILEM Workshop, V. Baroghel- Bouny and P.-C. Atcin, eds., Paris, France, 2000, pp. 21-33.
  9. Hammer, T. A., Justnes, H., BjOntegaard, O., and Sellevold, E.J., "8.2 Suggestions on the Terminology and the Test Methods Proposed by JCI," Autogenous Shrinkage of Concrete, Proceedings of the International Workshop, E. Tazawa Eds., E&FN Spon, 1998, pp. 397-399.
  10. Tazawa, E. I., "Autogenous Shrinkage of Concrete," Proceedings of the International Workshop, E. Tazawa Eds., E&FN Spon., 1998, pp. 3-8.
  11. Mounanga, P., Bouasker, M., Pertue, A., Perronnet, A., and Khelidj, A., "Early-Age Autogenous Cracking of Cementitious Matrices: Physico-Chemical Analysis and Micro/Macro Investigations," Materials and Structures, Vol. 44, No. 4, 2010, pp. 749-772.
  12. Sant, G., Lura, P., and Weiss, W. J., "Measurement of Volume Change in Cementitious Materials at Early Ages: Review of Testing Protocols and Interpretation of Results," Transportation Research Record, Vol. 1979, Transportation Research Board, Washington, DC, 2006, pp. 21-29.
  13. Holt, E., "Early Age Autogenous Shrinkage of Concrete," VTT Publication 446, Technical Research Centre of Finland, 2001, pp. 1-184.
  14. Sant, G. N., "Examining Volume Changes, Stress Development and Cracking in Cement Based Materials," Master's Thesis, Purdue University, West Lafayette, 2007, pp. 1-195.
  15. ASTM International, "Standard Test Method for Chemical Shrinkage of Hydraulic Cement Paste," ASTM C1608-07, West Conshohocken, PA, 2007, 4 pp.
  16. Bouasker, M., Mounanga, P., Turcry, P., Loukili, A., and Khelidj, A., "Chemical Shrinkage of Cement Pastes and Mortars at Very Early Age: Effect of Limestone Filler and Granular Inclusions," Cement and Concrete Composites, Vol. 30, No. 1, 2008, pp. 13-22. https://doi.org/10.1016/j.cemconcomp.2007.06.004
  17. Japan Concrete Institute, Japan Concrete Institute Report on Autogenous Shrinkage, E&FN Spon., London and New York, 1998.
  18. Bentz, D. P., "A Review of Early-Age Properties of Cement-Based Materials," Cement and Concrete Research, Vol. 38, No. 2, 2008, pp. 196-204. https://doi.org/10.1016/j.cemconres.2007.09.005
  19. Jensen, O. M. and Hansen, P. F., "Water-Entrained Cement-Based Materials; I. Principles and Theoretical Backgroun," Cement and Concrete Research, Vol. 31, No. 4, 2001, pp. 647-654. https://doi.org/10.1016/S0008-8846(01)00463-X
  20. 허우영, 김화중, "고강도 콘크리트의 수화수축과 자기수축의 실험연구," 한국건축시공학회 논문집, 4권, 2호, 2004, pp. 81-88. https://doi.org/10.5345/JKIC.2004.4.2.081
  21. Mounanga, P., Khelidj, A., Loukili, A., and Bouny-Baroghel, V., "Predicting $Ca(OH)_2$ Content and Chemical Shrinkage of Hydrating Cement Pastes Using Analytical Approach," Cement and Concrete Research, Vol. 34, No. 2, 2003, pp. 255-265.
  22. Taylor, H. F. W., "A Method for Predicting Alkali Ion Concentration in Cement Pore Solutions," Advances in Cement Research, Vol. 1, No. 1, 1987, pp. 5-17. https://doi.org/10.1680/adcr.1987.1.1.5
  23. Gutteridge, W. A. and Dalziel, J. A., "Filler Cement: The Effect of the Secondary Component on the Hydration of Portland Cement-Part 1. A Fine Non-hydraulic Filler," Cement and Concrete Research, Vol. 20, No. 6, 1990, pp. 778-782. https://doi.org/10.1016/0008-8846(90)90011-L
  24. Nawa, T. and Horita, T., "Autogenous Shrinkage of High-Performance Concrete," Proceedings of the International Workshop on Microstructure and Durability to Predict Service Life of Concrete Structures Sapporo, Japan, 2004.

Cited by

  1. Tensile Stress-Crack Opening Relationship of Ultra High Performance Cementitious Composites(UHPCC) Used for Bridge Decks vol.17, pp.1, 2013, https://doi.org/10.11112/jksmi.2013.17.1.046
  2. Reduction vol.17, pp.3, 2013, https://doi.org/10.11112/jksmi.2013.17.3.089
  3. A Study for Application of 180 MPa Ultra High Performance Concrete to Compressive Members vol.16, pp.7, 2015, https://doi.org/10.5762/KAIS.2015.16.7.4930
  4. Effect of Internal Curing by Super-Absorbent Polymer (SAP) on Hydration, Autogenous Shrinkage, Durability and Mechanical Characteristics of Ultra-High Performance Concrete (UHPC) vol.28, pp.3, 2016, https://doi.org/10.4334/JKCI.2016.28.3.317