대한건축학회논문집:구조계 (Journal of the Architectural Institute of Korea Structure & Construction)

  • 제28권8호
  • /
  • Pages.111-119
  • /
  • 2012
  • /
  • 1226-9107(pISSN)
  • /
  • 2384-1788(eISSN)
대한건축학회 (Architectural Institute of Korea)
권호 표지
DOI QR코드

DOI QR Code

섬유 및 혼화제를 이용한 황토 모르타르의 수축균열 제어

Shrinkage Crack Control of Hwangtoh Mortar using Fiber and Admixture

  • 문주현 (경기대 일반대학원 건축공학과) ;
  • 양근혁 (경기대 플랜트.건축공학과) ;
  • 전중규 (코오롱글로벌 R&BD센터 기반시설연구소) ;
  • 황혜주 (목포대 건축학과)
  • 투고 : 2012.03.14
  • 발행 : 2012.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

A total of 8 hwang-toh mortar mixes with no cement were tested to evaluate the effect of different fibers and admixtures on the control of shrinkage cracks of such mortars. The fiber types added were Lyocell, Poly-Amid and PVA, while, CSA and organic polymer were selected as the admixture. The shrinkage crack resistance of hwang-toh mortar were examined from the unrestrained drying shrinkage strain, restrained drying shrinkage and plastic shrinkage. Test results revealed that the unrestrained drying shrinkage strain of hwang-toh mortar sharply increased at an early age showing approximately 2.5 times higher values than predictions obtained from ACI 209, regardless of the addition of fibers and admixtures. In addition, cracks owing to the restrained drying shrinkage developed at the only age of 1.6 days in all test mixes; as a result, the cracking grade of hwang-toh mortar was evaluated to be high. On the other hand, the addition of fibers required a value of fiber spacing above 0.0003 in order to enhance the tensile resistance capacity of hwang-toh mortar under the restrained drying shrinkage and reduce the cracking area under the plastic shrinkage. Overall, it could be concluded that moist curing at an early age and the addition of fiber with fiber spacing above 0.0003 are practically effective in reducing shrinkage crack of hwang-toh mortar.

키워드

과제정보

연구 과제 주관 기관 : 국립문화재연구소

참고문헌

  1. 이현철, 고성석, "활성황토를 혼입한 모르터의 물리적 특성에 관한 연구", 대한건축학회논문집 구조계, 23(3), 2007, pp. 77-88.
  2. 최희용, 황혜주, 김무한, 김문한, "시멘트 모르터로의 적용을 위한 황토 혼화재 개발에 관한 연구", 대한건축학회논문집 구조계, 16(6), 2000, pp. 95-102.
  3. Yang, K. H., Hwang, H. J., Kim. S. Y. and Song, J. K., "Development of a Cementless Mortar using Hwangtoh Binder", Building and Environments, 42(10), 2007, pp. 3717-3725. https://doi.org/10.1016/j.buildenv.2006.09.006
  4. Yang, K. H., Hwang, H. J. and Lee, S., "Effects of Water-Binder Ratio and Fine Aggregate-Total Aggregate Ratio on the Properties of Hwangtoh-Based Alkali-Activated Concrete", Journal of Materials in Civil Engineering, ASCE, 22(9), 2010, pp. 887-896. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000091
  5. 최완철, 콘크리트 균열과 성능저하, 동화기술, 2010, 288. pp.
  6. Grazybowski M. and Shah S. P., "Shrinkage Cracking of Fiber Reinforced Concrete", ACI Materials Journal, 87(2), 1990, pp. 138-148.
  7. Chern, J. C. and Young C. H., "Study of Factors Influencing Drying Shrinkage of Steel Fiber Reinforced Concrete", ACI Materials Journal, 87(2), 1990, pp. 123-129.
  8. Shah, S. P., Karaguler, M. E. and Sarigaphuti, M., "Effects of Shrinkage-Reducing Admixtures on Restrained Shrinkage Cracking of Concrete", ACI Materials Journal, 89(3), 1992, pp. 289-295.
  9. 윤성원, 노재성, "산업폐기물을 이용한 CSA계 팽창제 제조 및 응용", 한국콘크리트학회논문집, 16(3), 2004, pp. 369-374.
  10. 박필환, 송명신, 이경희, "시멘트의 초기수화에서 폴리머의 영향", 한국세라믹학회논문집, 45(11), 2008, pp. 744-749.
  11. ACI 209R-92, Prediction of Creep, Shrinkage and Temperature Effects in Concrete Structures. ACI Manual of Concrete Practice, Part 1: Materials and General Properties of Concrete, Detroit. Michigan, 1994.
  12. ASTM C 1581, Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage, 2009, pp. 1-7.
  13. ACI 224R-01, Control of Cracking in Concrete Structures, ACI Committee 224, 2001, 46. pp.
  14. ASTM C 1579, Standard Test Method for Evaluating Plastic Shrinkage Cracking of Restrained Fiber Reinforced Conrete(Using a Steel Form Insert), 2006, pp. 1-7.
  15. IMT i-Solution Inc, 2012. 02, www. IMT-Solution.com
  16. Attiogbe, E. K., See, H. T. and Miltenberger, M. A., "Cracking Potential of Concrete Under Restrained Shrinkage", Proceedings, Advance in Cement and Concrete: Volume Changes, Cracking, and Durability, Engineering Conference International, Copper Mountatin, Co, 2003, pp. 191-200.
  17. Hossain, A. B. and Weiss, J., "Assessing Residual Stress Development and Stress Relaxation in Restrained Concrete Ring Specimens", Cement and Concrete Composites, 26(5), 2004, pp. 531-540. https://doi.org/10.1016/S0958-9465(03)00069-6
  18. Yang, K. H., "Tests on Conrete Reinforced with Hybrid or Monolithic Steel and PVA Fibers", ACI Materials Journal, 29(1), 2011, pp. 504-511.
  19. Beaudoin, J. J., Handbook of Fiber Reinforced Concrete: Principles, Properties, Developments and Applications, Noyes Publication, New Jersey, 1990.
  20. Hannant, D. J., Fibre Cements and Fibre Concrete, John Wiley & Sons, UK, 1978.
  21. Sivakumar, A. and Santhanam, M., "A Quantitative Study on the Plastic Shrinkage Cracking in High Strength Hybrid Fibre Reinforced Concrete", Cement and Concrete Composites, 29(7), 2007, pp. 575-581. https://doi.org/10.1016/j.cemconcomp.2007.03.005